001/*
002 *  Copyright 2010 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.cms.repository;
017
018import org.ametys.plugins.repository.AmetysRepositoryException;
019import org.ametys.plugins.repository.RepositoryConstants;
020import org.ametys.plugins.repository.query.expression.Expression;
021
022/**
023 * Constructs an {@link Expression} testing the content type.
024 */
025public class ContentTypeOrMixinExpression implements Expression
026{
027    private Operator _operator;
028    private String[] _values;
029
030    /**
031     * Creates the expression.
032     * @param operator the operator to make the comparison (only Operator.EQ and Operator.NE allowed)
033     * @param value the content type value
034     */
035    public ContentTypeOrMixinExpression(Operator operator, String... value)
036    {
037        if (Operator.EQ != operator && Operator.NE != operator)
038        {
039            throw new AmetysRepositoryException("Test operator '" + "' is unknown for test's expression.");
040        }
041        
042        _operator = operator;
043        _values = value;
044    }
045    
046    public String build()
047    {
048        StringBuilder xpath = new StringBuilder();
049        
050        if (_values.length == 1)
051        {
052            xpath.append("(");
053            xpath.append('@').append(RepositoryConstants.NAMESPACE_PREFIX_INTERNAL).append(':').append(DefaultContent.METADATA_CONTENTTYPE)
054                 .append(' ').append(_operator).append(" '").append(_values[0].replaceAll("'", "''")).append("'");
055            
056            xpath.append(" or ");
057            
058            xpath.append('@').append(RepositoryConstants.NAMESPACE_PREFIX_INTERNAL).append(':').append(DefaultContent.METADATA_MIXINCONTENTTYPES)
059            .append(' ').append(_operator).append(" '").append(_values[0].replaceAll("'", "''")).append("'");
060            xpath.append(")");
061            return xpath.toString();
062        }
063        
064        xpath.append(Operator.EQ.equals(_operator) ? '(' : "not(");
065        
066        for (int i = 0; i < _values.length; i++)
067        {
068            if (i > 0)
069            {
070                xpath.append(" or ");
071            }
072            
073            xpath.append('@').append(RepositoryConstants.NAMESPACE_PREFIX_INTERNAL).append(':').append(DefaultContent.METADATA_CONTENTTYPE)
074                 .append(" = '").append(_values[i].replaceAll("'", "''")).append("'");
075            xpath.append(" or ");
076            xpath.append('@').append(RepositoryConstants.NAMESPACE_PREFIX_INTERNAL).append(':').append(DefaultContent.METADATA_MIXINCONTENTTYPES)
077            .append(" = '").append(_values[i].replaceAll("'", "''")).append("'");
078        }
079        
080        xpath.append(')');
081        
082        return xpath.toString();
083    }
084}