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96 lines
2.8 KiB
96 lines
2.8 KiB
/*
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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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/*
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* Copyright 1999-2004 The Apache Software Foundation.
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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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/*
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* $Id: ExpressionContext.java,v 1.2.4.1 2005/09/10 19:34:03 jeffsuttor Exp $
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*/
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package com.sun.org.apache.xalan.internal.extensions;
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import javax.xml.transform.ErrorListener;
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import com.sun.org.apache.xpath.internal.objects.XObject;
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import org.w3c.dom.Node;
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import org.w3c.dom.traversal.NodeIterator;
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/**
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* An object that implements this interface can supply
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* information about the current XPath expression context.
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*/
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public interface ExpressionContext
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{
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/**
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* Get the current context node.
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* @return The current context node.
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*/
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public Node getContextNode();
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/**
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* Get the current context node list.
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* @return An iterator for the current context list, as
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* defined in XSLT.
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*/
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public NodeIterator getContextNodes();
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/**
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* Get the error listener.
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* @return The registered error listener.
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*/
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public ErrorListener getErrorListener();
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/**
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* Get the value of a node as a number.
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* @param n Node to be converted to a number. May be null.
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* @return value of n as a number.
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*/
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public double toNumber(Node n);
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/**
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* Get the value of a node as a string.
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* @param n Node to be converted to a string. May be null.
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* @return value of n as a string, or an empty string if n is null.
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*/
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public String toString(Node n);
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/**
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* Get a variable based on it's qualified name.
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*
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* @param qname The qualified name of the variable.
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*
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* @return The evaluated value of the variable.
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*
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* @throws javax.xml.transform.TransformerException
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*/
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public XObject getVariableOrParam(com.sun.org.apache.xml.internal.utils.QName qname)
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throws javax.xml.transform.TransformerException;
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/**
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* Get the XPathContext that owns this ExpressionContext.
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*
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* Note: exslt:function requires the XPathContext to access
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* the variable stack and TransformerImpl.
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*
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* @return The current XPathContext.
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* @throws javax.xml.transform.TransformerException
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*/
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public com.sun.org.apache.xpath.internal.XPathContext getXPathContext()
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throws javax.xml.transform.TransformerException;
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}
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