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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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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.commons.configuration;
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import java.util.Iterator;
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* Strict comparator for configurations.
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* @author <a href="mailto:herve.quiroz@esil.univ-mrs.fr">Herve Quiroz</a>
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* @author <a href="mailto:shapira@mpi.com">Yoav Shapira</a>
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* @version $Revision: 439648 $, $Date: 2006-09-02 22:42:10 +0200 (Sa, 02. Sep 2006) $
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public class StrictConfigurationComparator implements ConfigurationComparator
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* Create a new strict comparator.
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public StrictConfigurationComparator()
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* Compare two configuration objects.
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* @param a the first configuration
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* @param b the second configuration
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* @return true if keys from a are found in b and keys from b are
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* found in a and for each key in a, the corresponding value
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* is the sale in for the same key in b
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public boolean compare(Configuration a, Configuration b)
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if (a == null && b == null)
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else if (a == null || b == null)
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for (Iterator keys = a.getKeys(); keys.hasNext();)
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String key = (String) keys.next();
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Object value = a.getProperty(key);
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if (!value.equals(b.getProperty(key)))
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for (Iterator keys = b.getKeys(); keys.hasNext();)
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String key = (String) keys.next();
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Object value = b.getProperty(key);
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if (!value.equals(a.getProperty(key)))