/*
******************************************************************
Copyright (c) 2001-2007,2015 Jeff Martin, Tim Bacon
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modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
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* Redistributions in binary form must reproduce the above
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with the distribution.
* Neither the name of the XMLUnit nor the names
of its contributors may be used to endorse or promote products
derived from this software without specific prior written
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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*/
package org.custommonkey.xmlunit;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.traversal.DocumentTraversal;
import org.w3c.dom.traversal.NodeFilter;
import org.w3c.dom.traversal.NodeIterator;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* Encapsulation of the Node-by-Node testing of a DOM Document
* Uses a nodetype-specific <code>NodeFilter</code> to pass the DOM Nodes
* to a NodeTester instance that performs the acual Node validation.
* @see NodeTester
*/
public class NodeTest {
private final DocumentTraversal documentTraversal;
private final Node rootNode;
/**
* Construct a NodeTest for the DOM built using the String and JAXP
*/
public NodeTest(String xmlString)
throws SAXException, IOException {
this(new StringReader(xmlString));
}
/**
* Construct a NodeTest for the DOM built using the Reader and JAXP
*/
public NodeTest(Reader reader) throws SAXException,
IOException {
this(XMLUnit.buildDocument(XMLUnit.newControlParser(), reader));
}
/**
* Construct a NodeTest for the DOM built using the InputSource.
*/
public NodeTest(InputSource src) throws SAXException,
IOException {
this(XMLUnit.buildDocument(XMLUnit.newControlParser(), src));
}
/**
* Construct a NodeTest for the specified Document
* @exception IllegalArgumentException if the Document does not support the DOM
* DocumentTraversal interface (most DOM implementations should provide this
* support)
*/
public NodeTest(Document document) {
this(getDocumentTraversal(document),
document.getDocumentElement());
}
/**
* Try to cast a Document into a DocumentTraversal
* @param document
* @return DocumentTraversal interface if the DOM implementation supports it
*/
private static DocumentTraversal getDocumentTraversal(Document document) {
try {
return (DocumentTraversal) document;
} catch (ClassCastException e) {
throw new IllegalArgumentException("DOM Traversal not supported by "
+ document.getImplementation().getClass().getName()
+ ". To use this class you will need to switch to a DOM implementation that supports Traversal.");
}
}
/**
* Construct a NodeTest using the specified DocumentTraversal, starting at
* the specified root node
*/
public NodeTest(DocumentTraversal documentTraversal, Node rootNode) {
this.documentTraversal = documentTraversal;
this.rootNode = rootNode;
}
/**
* Does this NodeTest pass using the specified NodeTester instance?
* @param tester
* @param singleNodeType note <code>Node.ATTRIBUTE_NODE</code> is not
* exposed by the DocumentTraversal node iterator unless the root node
* is itself an attribute - so a NodeTester that needs to test attributes
* should obtain those attributes from <code>Node.ELEMENT_NODE</code>
* nodes
* @exception NodeTestException if test fails
*/
public void performTest(NodeTester tester, short singleNodeType)
throws NodeTestException {
performTest(tester, new short[] {singleNodeType});
}
/**
* Does this NodeTest pass using the specified NodeTester instance?
* @param tester
* @param nodeTypes note <code>Node.ATTRIBUTE_NODE</code> is not
* exposed by the DocumentTraversal node iterator unless the root node
* is itself an attribute - so a NodeTester that needs to test attributes
* should obtain those attributes from <code>Node.ELEMENT_NODE</code>
* nodes instead
* @exception NodeTestException if test fails
*/
public void performTest(NodeTester tester, short[] nodeTypes)
throws NodeTestException {
NodeIterator iter = documentTraversal.createNodeIterator(rootNode,
NodeFilter.SHOW_ALL, new NodeTypeNodeFilter(nodeTypes), true);
for (Node nextNode = iter.nextNode(); nextNode != null;
nextNode = iter.nextNode()) {
tester.testNode(nextNode, this);
}
tester.noMoreNodes(this);
}
/**
* Node type specific Node Filter: accepts Nodes of those types specified
* in constructor, rejects all others
*/
private static class NodeTypeNodeFilter implements NodeFilter {
private final short[] nodeTypes;
/**
* Construct filter for specific node types
* @param nodeTypes note <code>Node.ATTRIBUTE_NODE</code> is not
* exposed by the DocumentTraversal node iterator unless the root node
* is itself an attribute - so a NodeTester that needs to test attributes
* should obtain those attributes from <code>Node.ELEMENT_NODE</code>
* nodes
*/
public NodeTypeNodeFilter(short[] nodeTypes) {
this.nodeTypes = nodeTypes;
}
/**
* NodeFilter method.
* @param aNode
* @return
*/
public short acceptNode(Node aNode) {
if (acceptNodeType(aNode.getNodeType())) {
return NodeFilter.FILTER_ACCEPT;
}
return NodeFilter.FILTER_REJECT;
}
/**
* Does this instance accept nodes with the node type value
* @param shortVal
* @return
*/
private boolean acceptNodeType(short shortVal) {
for (int i=0; i < nodeTypes.length; ++i) {
if (nodeTypes[i] == shortVal) {
return true;
}
}
return false;
}
}
}