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696 lines
25 KiB
696 lines
25 KiB
/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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*/
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/*
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* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*/
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// Resolver.java - Represents an extension of OASIS Open Catalog files.
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/*
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* Copyright 2001-2004 The Apache Software Foundation or its licensors,
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* as applicable.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.sun.org.apache.xml.internal.resolver;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.FileNotFoundException;
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import java.util.Enumeration;
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import java.util.Vector;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.MalformedURLException;
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import javax.xml.parsers.SAXParserFactory;
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import com.sun.org.apache.xerces.internal.utils.SecuritySupport;
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import com.sun.org.apache.xml.internal.resolver.readers.SAXCatalogReader;
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import com.sun.org.apache.xml.internal.resolver.readers.OASISXMLCatalogReader;
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import com.sun.org.apache.xml.internal.resolver.readers.TR9401CatalogReader;
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import jdk.xml.internal.JdkXmlUtils;
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/**
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* An extension to OASIS Open Catalog files, this class supports
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* suffix-based matching and an external RFC2483 resolver.
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*
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* @see Catalog
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*
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* @author Norman Walsh
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* <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a>
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*
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* @version 1.0
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*/
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public class Resolver extends Catalog {
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/**
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* The URISUFFIX Catalog Entry type.
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*
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* <p>URI suffix entries match URIs that end in a specified suffix.</p>
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*/
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public static final int URISUFFIX = CatalogEntry.addEntryType("URISUFFIX", 2);
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/**
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* The SYSTEMSUFFIX Catalog Entry type.
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*
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* <p>System suffix entries match system identifiers that end in a
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* specified suffix.</p>
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*/
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public static final int SYSTEMSUFFIX = CatalogEntry.addEntryType("SYSTEMSUFFIX", 2);
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/**
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* The RESOLVER Catalog Entry type.
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*
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* <p>A hook for providing support for web-based backup resolvers.</p>
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*/
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public static final int RESOLVER = CatalogEntry.addEntryType("RESOLVER", 1);
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/**
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* The SYSTEMREVERSE Catalog Entry type.
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*
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* <p>This is a bit of a hack. There's no actual SYSTEMREVERSE entry,
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* but this entry type is used to indicate that a reverse lookup is
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* being performed. (This allows the Resolver to implement
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* RFC2483 I2N and I2NS.)
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*/
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public static final int SYSTEMREVERSE
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= CatalogEntry.addEntryType("SYSTEMREVERSE", 1);
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/**
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* Setup readers.
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*/
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public void setupReaders() {
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SAXParserFactory spf = JdkXmlUtils.getSAXFactory(catalogManager.overrideDefaultParser());
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spf.setValidating(false);
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SAXCatalogReader saxReader = new SAXCatalogReader(spf);
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saxReader.setCatalogParser(null, "XMLCatalog",
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"com.sun.org.apache.xml.internal.resolver.readers.XCatalogReader");
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saxReader.setCatalogParser(OASISXMLCatalogReader.namespaceName,
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"catalog",
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"com.sun.org.apache.xml.internal.resolver.readers.ExtendedXMLCatalogReader");
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addReader("application/xml", saxReader);
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TR9401CatalogReader textReader = new TR9401CatalogReader();
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addReader("text/plain", textReader);
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}
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/**
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* Cleanup and process a Catalog entry.
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*
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* <p>This method processes each Catalog entry, changing mapped
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* relative system identifiers into absolute ones (based on the current
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* base URI), and maintaining other information about the current
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* catalog.</p>
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*
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* @param entry The CatalogEntry to process.
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*/
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public void addEntry(CatalogEntry entry) {
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int type = entry.getEntryType();
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if (type == URISUFFIX) {
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String suffix = normalizeURI(entry.getEntryArg(0));
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String fsi = makeAbsolute(normalizeURI(entry.getEntryArg(1)));
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entry.setEntryArg(1, fsi);
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catalogManager.debug.message(4, "URISUFFIX", suffix, fsi);
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} else if (type == SYSTEMSUFFIX) {
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String suffix = normalizeURI(entry.getEntryArg(0));
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String fsi = makeAbsolute(normalizeURI(entry.getEntryArg(1)));
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entry.setEntryArg(1, fsi);
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catalogManager.debug.message(4, "SYSTEMSUFFIX", suffix, fsi);
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}
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super.addEntry(entry);
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}
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/**
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* Return the applicable URI.
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*
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* <p>If a URI entry exists in the Catalog
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* for the URI specified, return the mapped value.</p>
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*
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* <p>In the Resolver (as opposed to the Catalog) class, if the
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* URI isn't found by the usual algorithm, URISUFFIX entries are
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* considered.</p>
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*
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* <p>URI comparison is case sensitive.</p>
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*
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* @param uri The URI to locate in the catalog.
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*
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* @return The resolved URI.
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*
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* @throws MalformedURLException The system identifier of a
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* subordinate catalog cannot be turned into a valid URL.
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* @throws IOException Error reading subordinate catalog file.
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*/
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public String resolveURI(String uri)
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throws MalformedURLException, IOException {
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String resolved = super.resolveURI(uri);
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if (resolved != null) {
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return resolved;
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}
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Enumeration en = catalogEntries.elements();
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while (en.hasMoreElements()) {
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CatalogEntry e = (CatalogEntry) en.nextElement();
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if (e.getEntryType() == RESOLVER) {
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resolved = resolveExternalSystem(uri, e.getEntryArg(0));
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if (resolved != null) {
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return resolved;
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}
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} else if (e.getEntryType() == URISUFFIX) {
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String suffix = e.getEntryArg(0);
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String result = e.getEntryArg(1);
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if (suffix.length() <= uri.length()
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&& uri.substring(uri.length()-suffix.length()).equals(suffix)) {
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return result;
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}
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}
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}
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// Otherwise, look in the subordinate catalogs
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return resolveSubordinateCatalogs(Catalog.URI,
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null,
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null,
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uri);
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}
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/**
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* Return the applicable SYSTEM system identifier, resorting
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* to external RESOLVERs if necessary.
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*
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* <p>If a SYSTEM entry exists in the Catalog
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* for the system ID specified, return the mapped value.</p>
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*
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* <p>In the Resolver (as opposed to the Catalog) class, if the
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* URI isn't found by the usual algorithm, SYSTEMSUFFIX entries are
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* considered.</p>
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*
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* <p>On Windows-based operating systems, the comparison between
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* the system identifier provided and the SYSTEM entries in the
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* Catalog is case-insensitive.</p>
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*
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* @param systemId The system ID to locate in the catalog.
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*
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* @return The system identifier to use for systemId.
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*
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* @throws MalformedURLException The formal system identifier of a
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* subordinate catalog cannot be turned into a valid URL.
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* @throws IOException Error reading subordinate catalog file.
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*/
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public String resolveSystem(String systemId)
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throws MalformedURLException, IOException {
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String resolved = super.resolveSystem(systemId);
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if (resolved != null) {
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return resolved;
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}
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Enumeration en = catalogEntries.elements();
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while (en.hasMoreElements()) {
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CatalogEntry e = (CatalogEntry) en.nextElement();
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if (e.getEntryType() == RESOLVER) {
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resolved = resolveExternalSystem(systemId, e.getEntryArg(0));
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if (resolved != null) {
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return resolved;
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}
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} else if (e.getEntryType() == SYSTEMSUFFIX) {
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String suffix = e.getEntryArg(0);
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String result = e.getEntryArg(1);
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if (suffix.length() <= systemId.length()
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&& systemId.substring(systemId.length()-suffix.length()).equals(suffix)) {
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return result;
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}
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}
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}
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return resolveSubordinateCatalogs(Catalog.SYSTEM,
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null,
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null,
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systemId);
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}
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/**
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* Return the applicable PUBLIC or SYSTEM identifier, resorting
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* to external resolvers if necessary.
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*
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* <p>This method searches the Catalog and returns the system
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* identifier specified for the given system or
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* public identifiers. If
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* no appropriate PUBLIC or SYSTEM entry is found in the Catalog,
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* null is returned.</p>
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*
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* <p>Note that a system or public identifier in the current catalog
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* (or subordinate catalogs) will be used in preference to an
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* external resolver. Further, if a systemId is present, the external
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* resolver(s) will be queried for that before the publicId.</p>
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*
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* @param publicId The public identifier to locate in the catalog.
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* Public identifiers are normalized before comparison.
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* @param systemId The nominal system identifier for the entity
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* in question (as provided in the source document).
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*
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* @throws MalformedURLException The formal system identifier of a
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* subordinate catalog cannot be turned into a valid URL.
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* @throws IOException Error reading subordinate catalog file.
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*
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* @return The system identifier to use.
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* Note that the nominal system identifier is not returned if a
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* match is not found in the catalog, instead null is returned
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* to indicate that no match was found.
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*/
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public String resolvePublic(String publicId, String systemId)
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throws MalformedURLException, IOException {
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String resolved = super.resolvePublic(publicId, systemId);
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if (resolved != null) {
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return resolved;
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}
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Enumeration en = catalogEntries.elements();
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while (en.hasMoreElements()) {
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CatalogEntry e = (CatalogEntry) en.nextElement();
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if (e.getEntryType() == RESOLVER) {
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if (systemId != null) {
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resolved = resolveExternalSystem(systemId,
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e.getEntryArg(0));
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if (resolved != null) {
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return resolved;
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}
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}
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resolved = resolveExternalPublic(publicId, e.getEntryArg(0));
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if (resolved != null) {
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return resolved;
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}
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}
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}
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return resolveSubordinateCatalogs(Catalog.PUBLIC,
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null,
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publicId,
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systemId);
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}
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/**
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* Query an external RFC2483 resolver for a system identifier.
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*
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* @param systemId The system ID to locate.
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* @param resolver The name of the resolver to use.
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*
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* @return The system identifier to use for the systemId.
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*/
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protected String resolveExternalSystem(String systemId, String resolver)
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throws MalformedURLException, IOException {
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Resolver r = queryResolver(resolver, "i2l", systemId, null);
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if (r != null) {
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return r.resolveSystem(systemId);
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} else {
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return null;
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}
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}
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/**
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* Query an external RFC2483 resolver for a public identifier.
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*
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* @param publicId The system ID to locate.
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* @param resolver The name of the resolver to use.
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*
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* @return The system identifier to use for the systemId.
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*/
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protected String resolveExternalPublic(String publicId, String resolver)
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throws MalformedURLException, IOException {
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Resolver r = queryResolver(resolver, "fpi2l", publicId, null);
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if (r != null) {
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return r.resolvePublic(publicId, null);
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} else {
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return null;
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}
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}
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/**
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* Query an external RFC2483 resolver.
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*
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* @param resolver The URL of the RFC2483 resolver.
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* @param command The command to send the resolver.
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* @param arg1 The first argument to the resolver.
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* @param arg2 The second argument to the resolver, usually null.
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*
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* @return The Resolver constructed.
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*/
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protected Resolver queryResolver(String resolver,
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String command,
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String arg1,
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String arg2) {
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InputStream iStream = null;
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String RFC2483 = resolver + "?command=" + command
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+ "&format=tr9401&uri=" + arg1
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+ "&uri2=" + arg2;
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String line = null;
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try {
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URL url = new URL(RFC2483);
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URLConnection urlCon = url.openConnection();
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urlCon.setUseCaches(false);
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Resolver r = (Resolver) newCatalog();
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String cType = urlCon.getContentType();
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// I don't care about the character set or subtype
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if (cType.indexOf(";") > 0) {
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cType = cType.substring(0, cType.indexOf(";"));
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}
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r.parseCatalog(cType, urlCon.getInputStream());
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return r;
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} catch (CatalogException cex) {
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if (cex.getExceptionType() == CatalogException.UNPARSEABLE) {
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catalogManager.debug.message(1, "Unparseable catalog: " + RFC2483);
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} else if (cex.getExceptionType()
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== CatalogException.UNKNOWN_FORMAT) {
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catalogManager.debug.message(1, "Unknown catalog format: " + RFC2483);
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}
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return null;
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} catch (MalformedURLException mue) {
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catalogManager.debug.message(1, "Malformed resolver URL: " + RFC2483);
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return null;
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} catch (IOException ie) {
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catalogManager.debug.message(1, "I/O Exception opening resolver: " + RFC2483);
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return null;
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}
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}
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/**
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* Append two vectors, returning the result.
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*
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* @param vec The first vector
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* @param appvec The vector to be appended
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* @return The vector vec, with appvec's elements appended to it
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*/
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private Vector appendVector(Vector vec, Vector appvec) {
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if (appvec != null) {
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for (int count = 0; count < appvec.size(); count++) {
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vec.addElement(appvec.elementAt(count));
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}
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}
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return vec;
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}
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/**
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* Find the URNs for a given system identifier in all catalogs.
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*
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* @param systemId The system ID to locate.
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*
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* @return A vector of URNs that map to the systemId.
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*/
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public Vector resolveAllSystemReverse(String systemId)
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throws MalformedURLException, IOException {
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Vector resolved = new Vector();
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// If there's a SYSTEM entry in this catalog, use it
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if (systemId != null) {
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Vector localResolved = resolveLocalSystemReverse(systemId);
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resolved = appendVector(resolved, localResolved);
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}
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// Otherwise, look in the subordinate catalogs
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Vector subResolved = resolveAllSubordinateCatalogs(SYSTEMREVERSE,
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null,
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null,
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systemId);
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return appendVector(resolved, subResolved);
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}
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/**
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* Find the URN for a given system identifier.
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*
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* @param systemId The system ID to locate.
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*
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* @return A (single) URN that maps to the systemId.
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*/
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public String resolveSystemReverse(String systemId)
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throws MalformedURLException, IOException {
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Vector resolved = resolveAllSystemReverse(systemId);
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if (resolved != null && resolved.size() > 0) {
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return (String) resolved.elementAt(0);
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} else {
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return null;
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}
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}
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|
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/**
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* Return the applicable SYSTEM system identifiers.
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*
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* <p>If one or more SYSTEM entries exists in the Catalog
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* for the system ID specified, return the mapped values.</p>
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*
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* <p>The caller is responsible for doing any necessary
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* normalization of the system identifier before calling
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* this method. For example, a relative system identifier in
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* a document might be converted to an absolute system identifier
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* before attempting to resolve it.</p>
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*
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* <p>Note that this function will force all subordinate catalogs
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* to be loaded.</p>
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*
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|
* <p>On Windows-based operating systems, the comparison between
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* the system identifier provided and the SYSTEM entries in the
|
|
* Catalog is case-insensitive.</p>
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|
*
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|
* @param systemId The system ID to locate in the catalog.
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|
*
|
|
* @return The system identifier to use for the notation.
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|
*
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|
* @throws MalformedURLException The formal system identifier of a
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* subordinate catalog cannot be turned into a valid URL.
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|
* @throws IOException Error reading subordinate catalog file.
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*/
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public Vector resolveAllSystem(String systemId)
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throws MalformedURLException, IOException {
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Vector resolutions = new Vector();
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// If there are SYSTEM entries in this catalog, start with them
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if (systemId != null) {
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Vector localResolutions = resolveAllLocalSystem(systemId);
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resolutions = appendVector(resolutions, localResolutions);
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}
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// Then look in the subordinate catalogs
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Vector subResolutions = resolveAllSubordinateCatalogs(SYSTEM,
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null,
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null,
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systemId);
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resolutions = appendVector(resolutions, subResolutions);
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if (resolutions.size() > 0) {
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return resolutions;
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} else {
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return null;
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}
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}
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|
|
/**
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* Return all applicable SYSTEM system identifiers in this
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* catalog.
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*
|
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* <p>If one or more SYSTEM entries exists in the catalog file
|
|
* for the system ID specified, return the mapped values.</p>
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|
*
|
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* @param systemId The system ID to locate in the catalog
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*
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* @return A vector of the mapped system identifiers or null
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*/
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private Vector resolveAllLocalSystem(String systemId) {
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Vector map = new Vector();
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String osname = SecuritySupport.getSystemProperty("os.name");
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boolean windows = (osname.indexOf("Windows") >= 0);
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Enumeration en = catalogEntries.elements();
|
|
while (en.hasMoreElements()) {
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CatalogEntry e = (CatalogEntry) en.nextElement();
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if (e.getEntryType() == SYSTEM
|
|
&& (e.getEntryArg(0).equals(systemId)
|
|
|| (windows
|
|
&& e.getEntryArg(0).equalsIgnoreCase(systemId)))) {
|
|
map.addElement(e.getEntryArg(1));
|
|
}
|
|
}
|
|
if (map.size() == 0) {
|
|
return null;
|
|
} else {
|
|
return map;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find the URNs for a given system identifier in the current catalog.
|
|
*
|
|
* @param systemId The system ID to locate.
|
|
*
|
|
* @return A vector of URNs that map to the systemId.
|
|
*/
|
|
private Vector resolveLocalSystemReverse(String systemId) {
|
|
Vector map = new Vector();
|
|
String osname = SecuritySupport.getSystemProperty("os.name");
|
|
boolean windows = (osname.indexOf("Windows") >= 0);
|
|
Enumeration en = catalogEntries.elements();
|
|
while (en.hasMoreElements()) {
|
|
CatalogEntry e = (CatalogEntry) en.nextElement();
|
|
if (e.getEntryType() == SYSTEM
|
|
&& (e.getEntryArg(1).equals(systemId)
|
|
|| (windows
|
|
&& e.getEntryArg(1).equalsIgnoreCase(systemId)))) {
|
|
map.addElement(e.getEntryArg(0));
|
|
}
|
|
}
|
|
if (map.size() == 0) {
|
|
return null;
|
|
} else {
|
|
return map;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Search the subordinate catalogs, in order, looking for all
|
|
* match.
|
|
*
|
|
* <p>This method searches the Catalog and returns all of the system
|
|
* identifiers specified for the given entity type with the given
|
|
* name, public, and system identifiers. In some contexts, these
|
|
* may be null.</p>
|
|
*
|
|
* @param entityType The CatalogEntry type for which this query is
|
|
* being conducted. This is necessary in order to do the approprate
|
|
* query on a subordinate catalog.
|
|
* @param entityName The name of the entity being searched for, if
|
|
* appropriate.
|
|
* @param publicId The public identifier of the entity in question
|
|
* (as provided in the source document).
|
|
* @param systemId The nominal system identifier for the entity
|
|
* in question (as provided in the source document).
|
|
*
|
|
* @throws MalformedURLException The formal system identifier of a
|
|
* delegated catalog cannot be turned into a valid URL.
|
|
* @throws IOException Error reading delegated catalog file.
|
|
*
|
|
* @return The system identifier to use.
|
|
* Note that the nominal system identifier is not returned if a
|
|
* match is not found in the catalog, instead null is returned
|
|
* to indicate that no match was found.
|
|
*/
|
|
private synchronized Vector resolveAllSubordinateCatalogs(int entityType,
|
|
String entityName,
|
|
String publicId,
|
|
String systemId)
|
|
throws MalformedURLException, IOException {
|
|
|
|
Vector resolutions = new Vector();
|
|
|
|
for (int catPos = 0; catPos < catalogs.size(); catPos++) {
|
|
Resolver c = null;
|
|
|
|
try {
|
|
c = (Resolver) catalogs.elementAt(catPos);
|
|
} catch (ClassCastException e) {
|
|
String catfile = (String) catalogs.elementAt(catPos);
|
|
c = (Resolver) newCatalog();
|
|
|
|
try {
|
|
c.parseCatalog(catfile);
|
|
} catch (MalformedURLException mue) {
|
|
catalogManager.debug.message(1, "Malformed Catalog URL", catfile);
|
|
} catch (FileNotFoundException fnfe) {
|
|
catalogManager.debug.message(1, "Failed to load catalog, file not found",
|
|
catfile);
|
|
} catch (IOException ioe) {
|
|
catalogManager.debug.message(1, "Failed to load catalog, I/O error", catfile);
|
|
}
|
|
|
|
catalogs.setElementAt(c, catPos);
|
|
}
|
|
|
|
String resolved = null;
|
|
|
|
// Ok, now what are we supposed to call here?
|
|
if (entityType == DOCTYPE) {
|
|
resolved = c.resolveDoctype(entityName,
|
|
publicId,
|
|
systemId);
|
|
if (resolved != null) {
|
|
// Only find one DOCTYPE resolution
|
|
resolutions.addElement(resolved);
|
|
return resolutions;
|
|
}
|
|
} else if (entityType == DOCUMENT) {
|
|
resolved = c.resolveDocument();
|
|
if (resolved != null) {
|
|
// Only find one DOCUMENT resolution
|
|
resolutions.addElement(resolved);
|
|
return resolutions;
|
|
}
|
|
} else if (entityType == ENTITY) {
|
|
resolved = c.resolveEntity(entityName,
|
|
publicId,
|
|
systemId);
|
|
if (resolved != null) {
|
|
// Only find one ENTITY resolution
|
|
resolutions.addElement(resolved);
|
|
return resolutions;
|
|
}
|
|
} else if (entityType == NOTATION) {
|
|
resolved = c.resolveNotation(entityName,
|
|
publicId,
|
|
systemId);
|
|
if (resolved != null) {
|
|
// Only find one NOTATION resolution
|
|
resolutions.addElement(resolved);
|
|
return resolutions;
|
|
}
|
|
} else if (entityType == PUBLIC) {
|
|
resolved = c.resolvePublic(publicId, systemId);
|
|
if (resolved != null) {
|
|
// Only find one PUBLIC resolution
|
|
resolutions.addElement(resolved);
|
|
return resolutions;
|
|
}
|
|
} else if (entityType == SYSTEM) {
|
|
Vector localResolutions = c.resolveAllSystem(systemId);
|
|
resolutions = appendVector(resolutions, localResolutions);
|
|
break;
|
|
} else if (entityType == SYSTEMREVERSE) {
|
|
Vector localResolutions = c.resolveAllSystemReverse(systemId);
|
|
resolutions = appendVector(resolutions, localResolutions);
|
|
}
|
|
}
|
|
|
|
if (resolutions != null) {
|
|
return resolutions;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
}
|