001    // Copyright 2009 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.tapestry5.internal.pageload;
016    
017    /**
018     * Used to construct component names.
019     */
020    public class ComponentName
021    {
022        private final String pageName;
023    
024        final String nestedId;
025    
026        final String completeId;
027    
028        ComponentName(String pageName)
029        {
030            this.pageName = pageName;
031            this.nestedId = null;
032            this.completeId = pageName;
033        }
034    
035        private ComponentName(String pageName, String nestedId, String completeId)
036        {
037            this.completeId = completeId;
038            this.nestedId = nestedId;
039            this.pageName = pageName;
040        }
041    
042        ComponentName child(String embeddedId)
043        {
044            String newNestedId = nestedId == null
045                                 ? embeddedId
046                                 : nestedId + "." + embeddedId;
047    
048            return new ComponentName(pageName, newNestedId, pageName + ":" + newNestedId);
049        }
050    }