001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.servicemix.soap.util;
018    
019    import java.util.Collection;
020    import java.util.Iterator;
021    
022    import javax.xml.namespace.QName;
023    
024    import org.w3c.dom.Attr;
025    import org.w3c.dom.Element;
026    
027    /**
028     * Utilities for converting QNames into different representations
029     * 
030     * @author Alex Boisvert
031     * @version $Revision: 1.5 $
032     * @since 3.0
033     */
034    public class QNameUtil {
035    
036        /**
037         * Convert QName to the Clark notation, e.g., {namespace}localName
038         */
039        public static String toString(QName qname) {
040            if (qname.getNamespaceURI() == null) {
041                return "{}" + qname.getLocalPart();
042            } else {
043                return "{" + qname.getNamespaceURI() + "}" + qname.getLocalPart();
044            }
045        }
046    
047        /**
048         * Convert QName to the Clark notation, e.g., {namespace}localName
049         */
050        public static String toString(Element element) {
051            if (element.getNamespaceURI() == null) {
052                return "{}" + element.getLocalName();
053            } else {
054                return "{" + element.getNamespaceURI() + "}" + element.getLocalName();
055            }
056        }
057    
058        /**
059         * Convert QName to the Clark notation, e.g., {namespace}localName
060         */
061        public static String toString(Attr attr) {
062            if (attr.getNamespaceURI() == null) {
063                return "{}" + attr.getLocalName();
064            } else {
065                return "{" + attr.getNamespaceURI() + "}" + attr.getLocalName();
066            }
067        }
068    
069        public static String toString(Collection collection) {
070            StringBuffer buf = new StringBuffer();
071            Iterator iter = collection.iterator();
072            while (iter.hasNext()) {
073                QName qname = (QName) iter.next();
074                buf.append(toString(qname));
075                if (iter.hasNext()) {
076                    buf.append(", ");
077                }
078            }
079            return buf.toString();
080        }
081        
082        /**
083         * Convert a String back into a QName following the Clark notation
084         */
085        public static QName parse(String name) {
086            int pos = name.indexOf('}');
087            if (name.startsWith("{") && pos > 0) {
088                String ns = name.substring(1, pos);
089                String lname = name.substring(pos + 1, name.length());
090                return new QName(ns, lname);
091            }
092            return null;
093        }
094    
095    }