001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    
021    package org.sonar.squid.indexer;
022    
023    import org.sonar.squid.api.Query;
024    import org.sonar.squid.api.SourceCode;
025    
026    public class QueryByType implements Query {
027    
028      private final Class<? extends SourceCode> resourceType;
029    
030      public QueryByType(Class<? extends SourceCode> resourceType) {
031        if (resourceType == null) {
032          throw new IllegalStateException("The type of resource can't be null !");
033        }
034        this.resourceType = resourceType;
035      }
036    
037      public boolean match(SourceCode unit) {
038        return unit.isType(resourceType);
039      }
040    
041      @Override
042      public boolean equals(Object o) {
043        if (this == o) {
044          return true;
045        }
046        if (!(o instanceof QueryByType)) {
047          return false;
048        }
049    
050        QueryByType that = (QueryByType) o;
051    
052        if (resourceType != null ? !resourceType.equals(that.resourceType) : that.resourceType != null) {
053          return false;
054        }
055    
056        return true;
057      }
058    
059      @Override
060      public int hashCode() {
061        return resourceType != null ? resourceType.hashCode() : 0;
062      }
063    }