001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
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    package org.sonar.squid.indexer;
021    
022    import org.sonar.squid.api.SourceCode;
023    
024    public class QueryByType implements Query {
025    
026      private final Class<? extends SourceCode> resourceType;
027    
028      public QueryByType(Class<? extends SourceCode> resourceType) {
029        if (resourceType == null) {
030          throw new IllegalStateException("The type of resource can't be null !");
031        }
032        this.resourceType = resourceType;
033      }
034    
035      public boolean match(SourceCode unit) {
036        return unit.isType(resourceType);
037      }
038    }