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package com.sun.org.apache.xml.internal.utils;

import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

This class implements a generic PrefixResolver that can be used to perform prefix-to-namespace lookup for the XPath object.
@xsl.usagegeneral
/** * This class implements a generic PrefixResolver that * can be used to perform prefix-to-namespace lookup * for the XPath object. * @xsl.usage general */
public class PrefixResolverDefault implements PrefixResolver {
The context to resolve the prefix from, if the context is not given.
/** * The context to resolve the prefix from, if the context * is not given. */
Node m_context;
Construct a PrefixResolverDefault object.
Params:
  • xpathExpressionContext – The context from which XPath expression prefixes will be resolved. Warning: This will not work correctly if xpathExpressionContext is an attribute node.
/** * Construct a PrefixResolverDefault object. * @param xpathExpressionContext The context from * which XPath expression prefixes will be resolved. * Warning: This will not work correctly if xpathExpressionContext * is an attribute node. */
public PrefixResolverDefault(Node xpathExpressionContext) { m_context = xpathExpressionContext; }
Given a namespace, get the corrisponding prefix. This assumes that the PrevixResolver hold's it's own namespace context, or is a namespace context itself.
Params:
  • prefix – Prefix to resolve.
Returns:Namespace that prefix resolves to, or null if prefix is not bound.
/** * Given a namespace, get the corrisponding prefix. This assumes that * the PrevixResolver hold's it's own namespace context, or is a namespace * context itself. * @param prefix Prefix to resolve. * @return Namespace that prefix resolves to, or null if prefix * is not bound. */
public String getNamespaceForPrefix(String prefix) { return getNamespaceForPrefix(prefix, m_context); }
Given a namespace, get the corrisponding prefix. 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 namespace, get the corrisponding prefix. * 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 = Constants.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) { if (parent.getNodeName().indexOf(prefix+":") == 0) return parent.getNamespaceURI(); 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; }
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; } }