Java XML QName getMatchingExtensionProvider(Map<QName, T> extensionMap, String namespaceURI, String prefix, String localName)

Description

returns the matching Extension provider for a given QName/namespaceURI+prefix+localName combination

License

Apache License

Parameter

Parameter	Description
extensionMap	registered extension Map for the corresponding extension provider
namespaceURI	binding namespace in xpath expression
prefix	binding prefix string in xpath expression
localName	binding localname string in xpath expression
T	Variable/Function Context Provider Type

Return

matching Extension provider. returns null if no extension is found for the given combination

Declaration

private static <T> T getMatchingExtensionProvider(Map<QName, T> extensionMap, String namespaceURI,
        String prefix, String localName)

Method Source Code


//package com.java2s;
/*//from  w  w w . j  a va 2  s .  c  o m
 *  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.
 */

import javax.xml.namespace.QName;
import java.util.*;

public class Main {
    /**
     * returns the matching Extension provider for a given QName/namespaceURI+prefix+localName
     * combination
     *
     * @param extensionMap registered extension Map for the corresponding extension provider
     * @param namespaceURI binding namespace in xpath expression
     * @param prefix       binding prefix string in xpath expression
     * @param localName    binding localname string in xpath expression
     * @param <T>          Variable/Function Context Provider Type
     * @return matching Extension provider. returns null if no extension is found for the given
     *         combination
     */
    private static <T> T getMatchingExtensionProvider(Map<QName, T> extensionMap, String namespaceURI,
            String prefix, String localName) {
        QName subject;
        if (localName != null && prefix != null) {
            subject = new QName(namespaceURI, localName, prefix);
        } else if (localName != null) {
            subject = new QName(namespaceURI, localName);
        } else {
            //can't resolve xpath extensions - invalid combination
            return null;
        }

        Set<QName> qNames = extensionMap.keySet();
        for (QName qName : qNames) {
            //check for a match for the given combination for QName registered
            if (subject.equals(qName)) {
                return extensionMap.get(qName);
            }
        }
        //no match found
        return null;

    }
}

Java XML QName getMatchingExtensionProvider(Map extensionMap, String namespaceURI, String prefix, String localName)