/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.exoplatform.services.jcr.impl.core.query;
import org.exoplatform.services.jcr.core.NamespaceAccessor;
import java.util.Enumeration;
import java.util.Properties;
import java.util.Set;
import javax.jcr.NamespaceException;
import javax.jcr.NamespaceRegistry;
import javax.jcr.RepositoryException;
/**
* A simple namespace resolver implementation, that uses the additional
* namespaces declared in an XML element.
*/
public class AdditionalNamespaceResolver implements NamespaceAccessor {
/** Map from namespace prefixes to namespace URIs. */
private final Properties prefixToURI = new Properties();
/** Map from namespace URIs to namespace prefixes. */
private final Properties uriToPrefix = new Properties();
/**
* Creates a namespace resolver using the namespaces defined in
* the given prefix-to-URI property set.
*
* @param namespaces namespace properties
*/
public AdditionalNamespaceResolver(Properties namespaces) {
Enumeration<?> prefixes = namespaces.propertyNames();
while (prefixes.hasMoreElements()) {
String prefix = (String) prefixes.nextElement();
addNamespace(prefix, namespaces.getProperty(prefix));
}
addNamespace("", "");
}
/**
* Creates a namespace resolver using the namespaces declared
* in the given namespace registry.
*
* @param registry namespace registry
* @throws RepositoryException on repository errors
*/
public AdditionalNamespaceResolver(NamespaceRegistry registry)
throws RepositoryException {
String[] prefixes = registry.getPrefixes();
for (int i = 0; i < prefixes.length; i++) {
addNamespace(prefixes[i], registry.getURI(prefixes[i]));
}
}
/**
* Adds the given namespace declaration to this resolver.
*
* @param prefix namespace prefix
* @param uri namespace URI
*/
private void addNamespace(String prefix, String uri) {
prefixToURI.put(prefix, uri);
uriToPrefix.put(uri, prefix);
}
/** {@inheritDoc} */
public String getURI(String prefix) throws NamespaceException {
String uri = prefixToURI.getProperty(prefix);
if (uri != null) {
return uri;
} else {
throw new NamespaceException(
"Unknown namespace prefix " + prefix + ".");
}
}
/** {@inheritDoc} */
public String getPrefix(String uri) throws NamespaceException {
String prefix = uriToPrefix.getProperty(uri);
if (prefix != null) {
return prefix;
} else {
throw new NamespaceException(
"Unknown namespace URI " + uri + ".");
}
}
public String[] getAllNamespacePrefixes() throws RepositoryException
{
Set<Object> keySet = prefixToURI.keySet();
return (String[])keySet.toArray(new String[keySet.size()]);
}
public String getNamespacePrefixByURI(String uri) throws NamespaceException, RepositoryException
{
return getPrefix(uri);
}
public String getNamespaceURIByPrefix(String prefix) throws NamespaceException, RepositoryException
{
return getURI(prefix);
}
}