001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.util.xml;
016    
017    import org.apache.hivemind.HiveMind;
018    import org.xml.sax.Attributes;
019    
020    /**
021     * Base implementation of {@link org.apache.tapestry.util.xml.IRule}that does nothing.
022     * 
023     * @author Howard Lewis Ship
024     * @since 3.0
025     */
026    public class BaseRule implements IRule
027    {
028        protected String getAttribute(Attributes attributes, String name)
029        {
030            int count = attributes.getLength();
031    
032            for (int i = 0; i < count; i++)
033            {
034                String attributeName = attributes.getLocalName(i);
035    
036                if (HiveMind.isBlank(attributeName))
037                    attributeName = attributes.getQName(i);
038    
039                if (attributeName.equals(name))
040                    return attributes.getValue(i);
041            }
042    
043            return null;
044        }
045    
046        public void startElement(RuleDirectedParser parser, Attributes attributes)
047        {
048    
049        }
050    
051        public void endElement(RuleDirectedParser parser)
052        {
053    
054        }
055    
056        public void content(RuleDirectedParser parser, String content)
057        {
058    
059        }
060    
061    }