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package com.sun.org.apache.xpath.internal.jaxp;

import org.w3c.dom.Node;
import org.w3c.dom.NamedNodeMap;
import com.sun.org.apache.xml.internal.utils.PrefixResolver;

import javax.xml.namespace.NamespaceContext;

This class implements a Default PrefixResolver which can be used to perform prefix-to-namespace lookup for the XPath object. This class delegates the resolution to the passed NamespaceContext
/** * <meta name="usage" content="general"/> * This class implements a Default PrefixResolver which * can be used to perform prefix-to-namespace lookup * for the XPath object. * This class delegates the resolution to the passed NamespaceContext */
public class JAXPPrefixResolver implements PrefixResolver { private NamespaceContext namespaceContext; public JAXPPrefixResolver ( NamespaceContext nsContext ) { this.namespaceContext = nsContext; } public String getNamespaceForPrefix( String prefix ) { return namespaceContext.getNamespaceURI( prefix ); }
Return the base identifier.
Returns:null
/** * Return the base identifier. * * @return null */
public String getBaseIdentifier() { return null; }
See Also:
  • handlesNullPrefixes.handlesNullPrefixes()
/** * @see PrefixResolver#handlesNullPrefixes() */
public boolean handlesNullPrefixes() { return false; }
The URI for the XML namespace. (Duplicate of that found in com.sun.org.apache.xpath.internal.XPathContext).
/** * The URI for the XML namespace. * (Duplicate of that found in com.sun.org.apache.xpath.internal.XPathContext). */
public static final String S_XMLNAMESPACEURI = "http://www.w3.org/XML/1998/namespace";
Given a prefix and a Context Node, get the corresponding namespace. Warning: This will not work correctly if namespaceContext is an attribute node.
Params:
  • prefix – Prefix to resolve.
  • namespaceContext – Node from which to start searching for a xmlns attribute that binds a prefix to a namespace.
Returns:Namespace that prefix resolves to, or null if prefix is not bound.
/** * Given a prefix and a Context Node, get the corresponding namespace. * Warning: This will not work correctly if namespaceContext * is an attribute node. * @param prefix Prefix to resolve. * @param namespaceContext Node from which to start searching for a * xmlns attribute that binds a prefix to a namespace. * @return Namespace that prefix resolves to, or null if prefix * is not bound. */
public String getNamespaceForPrefix(String prefix, org.w3c.dom.Node namespaceContext) { Node parent = namespaceContext; String namespace = null; if (prefix.equals("xml")) { namespace = S_XMLNAMESPACEURI; } else { int type; while ((null != parent) && (null == namespace) && (((type = parent.getNodeType()) == Node.ELEMENT_NODE) || (type == Node.ENTITY_REFERENCE_NODE))) { if (type == Node.ELEMENT_NODE) { NamedNodeMap nnm = parent.getAttributes(); for (int i = 0; i < nnm.getLength(); i++) { Node attr = nnm.item(i); String aname = attr.getNodeName(); boolean isPrefix = aname.startsWith("xmlns:"); if (isPrefix || aname.equals("xmlns")) { int index = aname.indexOf(':'); String p =isPrefix ?aname.substring(index + 1) :""; if (p.equals(prefix)) { namespace = attr.getNodeValue(); break; } } } } parent = parent.getParentNode(); } } return namespace; } }