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/*
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* JBind
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*
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* Copyright (c) by Stefan Wachter. All rights reserved.
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*
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* Usage, modification, and redistribution is subject to license terms that are
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* available at 'http://www.jbind.org'. The JBind license is like the
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* 'Apache Software License V 1.1'.
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*/
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package org.jbind.xml.facade;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.Map;
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import javax.xml.transform.TransformerException;
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import org.apache.xml.utils.PrefixResolver;
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import org.apache.xpath.XPathAPI;
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import org.apache.xpath.objects.XObject;
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import org.jbind.xml.core.bridge.IDataImpl;
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import org.jbind.xml.core.bridge.IXPath;
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import org.jbind.xml.core.bridge.IXPathFactory;
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import org.jbind.xml.core.bridge.XPath;
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import org.jbind.xml.dom3.types.IDomAttrOrElm;
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import org.jbind.xml.dom3.types.IDomNode;
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import org.jbind.xml.msg.XmlException;
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import org.jbind.xml.msg.XmlMessages;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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public class XalanXPathFactory implements IXPathFactory {
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public XalanXPathFactory() {}
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public IXPath createXPath(String anXPath, Map aPrefixMappings, boolean aRestrictedForm) throws Exception {
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return new XalanXPath(anXPath, aPrefixMappings);
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}
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private static class XalanXPath extends XPath implements IXPath, PrefixResolver {
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private Map myPrefixMappings = null;
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public XalanXPath(String anXPath, Map aPrefixMappings) throws Exception {
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super(anXPath);
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myPrefixMappings = aPrefixMappings;
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}
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public Iterator select(IDataImpl aContext) throws XmlException {
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Iterator res = null;
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IDomNode node = (IDomNode)aContext;
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try {
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XObject xObject = XPathAPI.eval(node, getXPath(), this);
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NodeList nodeList = xObject.nodelist();
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ArrayList l = new ArrayList();
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for (int i = 0; i < nodeList.getLength(); i++) {
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IDomAttrOrElm n = (IDomAttrOrElm)nodeList.item(i);
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l.add(n);
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}
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res = l.iterator();
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} catch (TransformerException e) {
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throw new XmlException(XmlMessages.xPathException(getXPath(), e, node));
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}
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return res;
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}
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public boolean test(IDataImpl aContext) throws XmlException {
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boolean res;
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try {
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XObject xObject = eval(aContext);
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res = xObject.bool();
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} catch (TransformerException e) {
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throw new XmlException(XmlMessages.xPathException(getXPath(), e, aContext));
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}
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return res;
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}
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public double number(IDataImpl aContext) throws XmlException {
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double res;
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try {
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XObject xObject = eval(aContext);
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res = xObject.num();
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} catch (TransformerException e) {
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throw new XmlException(XmlMessages.xPathException(getXPath(), e, aContext));
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}
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return res;
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}
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public String string(IDataImpl aContext) throws XmlException {
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String res;
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try {
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XObject xObject = eval(aContext);
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res = xObject.str();
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} catch (TransformerException e) {
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throw new XmlException(XmlMessages.xPathException(getXPath(), e, aContext));
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}
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return res;
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}
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private XObject eval(IDataImpl aContext) throws TransformerException {
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IDomNode node = (IDomNode)aContext;
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return XPathAPI.eval(node, getXPath(), this);
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}
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//
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// Implementation of prefix resolver
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//
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public String getBaseIdentifier() {
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return null;
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}
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public String getNamespaceForPrefix(String aPrefix) {
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String res = (String)myPrefixMappings.get(aPrefix);
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return res;
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}
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public String getNamespaceForPrefix(String aPrefix, Node aNode) {
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String res = ((IDomNode)aNode).lookupNamespaceURI(aPrefix);
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return res;
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}
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public boolean handlesNullPrefixes() {
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return false;
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}
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}
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}
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