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package org.apache.camel.builder.xml; |
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import org.w3c.dom.Element; |
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import org.w3c.dom.NamedNodeMap; |
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import org.w3c.dom.Node; |
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import org.w3c.dom.Attr; |
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import javax.xml.namespace.NamespaceContext; |
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import javax.xml.xpath.XPathFactory; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.Map; |
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import java.util.Set; |
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public class DefaultNamespaceContext implements NamespaceContext { |
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private final Map map; |
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private final NamespaceContext parent; |
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public DefaultNamespaceContext() { |
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this(XPathFactory.newInstance()); |
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} |
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public DefaultNamespaceContext(XPathFactory factory) { |
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this.parent = factory.newXPath().getNamespaceContext(); |
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this.map = new HashMap(); |
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} |
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public DefaultNamespaceContext(NamespaceContext parent, Map map) { |
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this.parent = parent; |
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this.map = map; |
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} |
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public DefaultNamespaceContext add(String prefix, String uri) { |
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map.put(prefix, uri); |
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return this; |
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} |
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public String getNamespaceURI(String prefix) { |
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String answer = (String) map.get(prefix); |
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if (answer == null && parent != null) { |
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return parent.getNamespaceURI(prefix); |
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} |
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return answer; |
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} |
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public String getPrefix(String namespaceURI) { |
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for (Iterator iter = map.entrySet().iterator(); iter.hasNext();) { |
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Map.Entry entry = (Map.Entry) iter.next(); |
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if (namespaceURI.equals(entry.getValue())) { |
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return (String) entry.getKey(); |
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} |
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} |
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if (parent != null) { |
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return parent.getPrefix(namespaceURI); |
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} |
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return null; |
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} |
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public Iterator getPrefixes(String namespaceURI) { |
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Set set = new HashSet(); |
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for (Iterator iter = map.entrySet().iterator(); iter.hasNext();) { |
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Map.Entry entry = (Map.Entry) iter.next(); |
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if (namespaceURI.equals(entry.getValue())) { |
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set.add(entry.getKey()); |
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} |
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} |
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if (parent != null) { |
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Iterator iter = parent.getPrefixes(namespaceURI); |
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while (iter.hasNext()) { |
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set.add(iter.next()); |
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} |
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} |
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return set.iterator(); |
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} |
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public void setNamespacesFromDom(Element element) { |
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Node parentNode = element.getParentNode(); |
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if (parentNode instanceof Element) { |
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setNamespacesFromDom((Element) parentNode); |
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} |
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NamedNodeMap attributes = element.getAttributes(); |
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for (int i = 0, size = attributes.getLength(); i < size; i++) { |
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Attr node = (Attr) attributes.item(i); |
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String name = node.getName(); |
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if (name.startsWith("xmlns:")) { |
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String prefix = name.substring("xmlns:".length()); |
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String uri = node.getValue(); |
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add(prefix, uri); |
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} |
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} |
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} |
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} |