001/*
002 *  Copyright 2016 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.plugins.repository.activities;
017
018import org.ametys.plugins.repository.AmetysRepositoryException;
019import org.ametys.plugins.repository.query.expression.Expression;
020import org.ametys.plugins.repository.query.expression.MetadataExpression;
021
022/**
023 * Constructs an {@link Expression} corresponding to a activity'type comparison.
024 */
025public class ActivityTypeExpression implements Expression
026{
027    private static final String __METADATA_EXPRESSION = new MetadataExpression(ActivityFactory.TYPE).build();
028    private Operator _operator;
029    private String[] _values;
030
031    /**
032     * Creates the expression.
033     * @param operator the operator to make the comparison (only Operator.EQ and Operator.NE allowed)
034     * @param value the activity type id value 
035     */
036    public ActivityTypeExpression(Operator operator, String value)
037    {
038        if (Operator.EQ != operator && Operator.NE != operator)
039        {
040            throw new AmetysRepositoryException("Test operator '" + "' is unknown for test's expression.");
041        }
042
043        _operator = operator;
044        _values = new String[]{value};
045    }
046    
047    /**
048     * Creates the expression.
049     * @param operator the operator to make the comparison (only Operator.EQ and Operator.NE allowed)
050     * @param values the activity' type values 
051     */
052    public ActivityTypeExpression(Operator operator, String... values)
053    {
054        _operator = operator;
055        _values = values;
056    }
057    
058    @Override
059    public String build()
060    {
061        StringBuilder xpath = new StringBuilder();
062        
063        if (_values.length == 1)
064        {
065            xpath.append(__METADATA_EXPRESSION)
066                 .append(' ').append(_operator).append(" '").append(_values[0].replaceAll("'", "''")).append("'");
067            
068            return xpath.toString();
069        }
070        
071        xpath.append(Operator.EQ.equals(_operator) ? '(' : "not(");
072        
073        for (int i = 0; i < _values.length; i++)
074        {
075            if (i > 0)
076            {
077                xpath.append(" or ");
078            }
079            
080            xpath.append(__METADATA_EXPRESSION)
081                 .append(" = '").append(_values[i].replaceAll("'", "''")).append("'");
082        }
083        
084        xpath.append(')');
085        
086        return xpath.toString();
087    }
088}