001    // Copyright 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.pageload;
016    
017    import org.apache.tapestry.TapestryConstants;
018    
019    /**
020     * Returns the namespace property for the
021     * {@link org.apache.tapestry.TapestryConstants#PAGE_CLASS_NAME} key.
022     * 
023     * @author Howard M. Lewis Ship
024     * @since 4.0
025     */
026    public class NamespaceDefaultPageClassProvider implements
027            ComponentClassProvider
028    {
029    
030        public String provideComponentClassName(
031                ComponentClassProviderContext context)
032        {
033            // This may be null, if the namespace fails to define this meta data
034            // value.
035    
036            return context.getNamespace().getPropertyValue(
037                    TapestryConstants.PAGE_CLASS_NAME);
038        }
039    
040    }