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114 lines
3.8 KiB
114 lines
3.8 KiB
/*
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* Copyright (c) 2005, 2011, 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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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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/*
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* $Id: RetrievalMethod.java,v 1.8 2005/05/10 16:35:35 mullan Exp $
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*/
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package javax.xml.crypto.dsig.keyinfo;
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import javax.xml.crypto.Data;
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import javax.xml.crypto.URIReference;
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import javax.xml.crypto.URIReferenceException;
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import javax.xml.crypto.XMLCryptoContext;
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import javax.xml.crypto.XMLStructure;
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import javax.xml.crypto.dsig.Transform;
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import java.util.List;
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/**
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* A representation of the XML <code>RetrievalMethod</code> element as
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* defined in the <a href="http://www.w3.org/TR/xmldsig-core/">
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* W3C Recommendation for XML-Signature Syntax and Processing</a>.
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* A <code>RetrievalMethod</code> object is used to convey a reference to
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* <code>KeyInfo</code> information that is stored at another location.
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* The XML schema definition is defined as:
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*
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* <pre>
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* <element name="RetrievalMethod" type="ds:RetrievalMethodType"/>
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* <complexType name="RetrievalMethodType">
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* <sequence>
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* <element name="Transforms" type="ds:TransformsType" minOccurs="0"/>
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* </sequence>
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* <attribute name="URI" type="anyURI"/>
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* <attribute name="Type" type="anyURI" use="optional"/>
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* </complexType>
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* </pre>
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*
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* A <code>RetrievalMethod</code> instance may be created by invoking one of the
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* {@link KeyInfoFactory#newRetrievalMethod newRetrievalMethod} methods
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* of the {@link KeyInfoFactory} class, and passing it the URI
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* identifying the location of the KeyInfo, an optional type URI identifying
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* the type of KeyInfo, and an optional list of {@link Transform}s; for example:
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* <pre>
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* KeyInfoFactory factory = KeyInfoFactory.getInstance("DOM");
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* RetrievalMethod rm = factory.newRetrievalMethod
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* ("#KeyValue-1", KeyValue.DSA_TYPE, Collections.singletonList(Transform.BASE64));
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* </pre>
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*
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* @author Sean Mullan
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* @author JSR 105 Expert Group
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* @since 1.6
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* @see KeyInfoFactory#newRetrievalMethod(String)
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* @see KeyInfoFactory#newRetrievalMethod(String, String, List)
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*/
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public interface RetrievalMethod extends URIReference, XMLStructure {
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/**
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* Returns an {@link java.util.Collections#unmodifiableList unmodifiable
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* list} of {@link Transform}s of this <code>RetrievalMethod</code>.
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*
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* @return an unmodifiable list of <code>Transform</code> objects (may be
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* empty but never <code>null</code>).
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*/
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@SuppressWarnings("rawtypes")
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List getTransforms();
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/**
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* Returns the URI of the referenced <code>KeyInfo</code> information.
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*
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* @return the URI of the referenced <code>KeyInfo</code> information in
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* RFC 2396 format (never <code>null</code>)
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*/
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String getURI();
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/**
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* Dereferences the <code>KeyInfo</code> information referenced by this
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* <code>RetrievalMethod</code> and applies the specified
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* <code>Transform</code>s.
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*
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* @param context an <code>XMLCryptoContext</code> that may contain
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* additional useful information for dereferencing the URI. The
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* context's <code>baseURI</code> and <code>dereferencer</code>
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* parameters (if specified) are used to resolve and dereference this
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* <code>RetrievalMethod</code>
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* @return a <code>Data</code> object representing the raw contents of the
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* <code>KeyInfo</code> information referenced by this
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* <code>RetrievalMethod</code>. It is the caller's responsibility to
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* convert the returned data to an appropriate
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* <code>KeyInfo</code> object.
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* @throws NullPointerException if <code>context</code> is <code>null</code>
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* @throws URIReferenceException if there is an error while dereferencing
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*/
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Data dereference(XMLCryptoContext context) throws URIReferenceException;
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}
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