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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package org.apache.harmony.xml.dom;
     18 
     19 import org.w3c.dom.Attr;
     20 import org.w3c.dom.DOMException;
     21 import org.w3c.dom.Element;
     22 import org.w3c.dom.Node;
     23 import org.w3c.dom.TypeInfo;
     24 
     25 /**
     26  * Provides a straightforward implementation of the corresponding W3C DOM
     27  * interface. The class is used internally only, thus only notable members that
     28  * are not in the original interface are documented (the W3C docs are quite
     29  * extensive). Hope that's ok.
     30  * <p>
     31  * Some of the fields may have package visibility, so other classes belonging to
     32  * the DOM implementation can easily access them while maintaining the DOM tree
     33  * structure.
     34  */
     35 public final class AttrImpl extends NodeImpl implements Attr {
     36 
     37     // Maintained by ElementImpl.
     38     ElementImpl ownerElement;
     39     boolean isId;
     40 
     41     boolean namespaceAware;
     42     String namespaceURI;
     43     String prefix;
     44     String localName;
     45 
     46     private String value = "";
     47 
     48     AttrImpl(DocumentImpl document, String namespaceURI, String qualifiedName) {
     49         super(document);
     50         setNameNS(this, namespaceURI, qualifiedName);
     51     }
     52 
     53     AttrImpl(DocumentImpl document, String name) {
     54         super(document);
     55         setName(this, name);
     56     }
     57 
     58     @Override
     59     public String getLocalName() {
     60         return namespaceAware ? localName : null;
     61     }
     62 
     63     public String getName() {
     64         return prefix != null
     65                 ? prefix + ":" + localName
     66                 : localName;
     67     }
     68 
     69     @Override
     70     public String getNamespaceURI() {
     71         return namespaceURI;
     72     }
     73 
     74     @Override
     75     public String getNodeName() {
     76         return getName();
     77     }
     78 
     79     public short getNodeType() {
     80         return Node.ATTRIBUTE_NODE;
     81     }
     82 
     83     @Override
     84     public String getNodeValue() {
     85         return getValue();
     86     }
     87 
     88     public Element getOwnerElement() {
     89         return ownerElement;
     90     }
     91 
     92     @Override
     93     public String getPrefix() {
     94         return prefix;
     95     }
     96 
     97     public boolean getSpecified() {
     98         return value != null;
     99     }
    100 
    101     public String getValue() {
    102         return value;
    103     }
    104 
    105     @Override
    106     public void setPrefix(String prefix) {
    107         this.prefix = validatePrefix(prefix, namespaceAware, namespaceURI);
    108     }
    109 
    110     public void setValue(String value) throws DOMException {
    111         this.value = value;
    112     }
    113 
    114     public TypeInfo getSchemaTypeInfo() {
    115         // TODO: populate this when we support XML Schema
    116         return NULL_TYPE_INFO;
    117     }
    118 
    119     public boolean isId() {
    120         return isId;
    121     }
    122 }
    123