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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
DelegatingPropertySource.java | 100% | 100% | 75% | 94.4% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.util;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.tapestry.engine.IPropertySource;
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/**
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* An implementation of {@link IPropertySource}
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* that delegates to a list of other implementations. This makes
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* it possible to create a search path for property values.
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*
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* @author Howard Lewis Ship
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* @since 2.3
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*
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**/
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public class DelegatingPropertySource implements IPropertySource |
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{ |
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private List _sources = new ArrayList(); |
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public DelegatingPropertySource()
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{ |
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} |
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public DelegatingPropertySource(IPropertySource delegate)
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{ |
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addSource(delegate); |
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} |
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/**
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* Adds another source to the list of delegate property sources.
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* This is typically only done during initialization
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* of this DelegatingPropertySource.
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*
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**/
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public void addSource(IPropertySource source) |
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{ |
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_sources.add(source); |
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} |
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/**
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* Re-invokes the method on each delegate property source,
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* in order, return the first non-null value found.
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*
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**/
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public String getPropertyValue(String propertyName)
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{ |
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String result = null;
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int count = _sources.size();
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for (int i = 0; i < count; i++) |
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{ |
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IPropertySource source = (IPropertySource)_sources.get(i); |
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result = source.getPropertyValue(propertyName); |
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if (result != null) |
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break;
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} |
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return result;
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} |
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} |
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