/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.kernel.exps;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.lib.util.SimpleRegex;
import serp.util.Strings;
/**
* Expression that compares two others.
*
* @author Abe White
*/
class MatchesExpression
extends CompareExpression {
private static final Localizer _loc = Localizer.forPackage(
MatchesExpression.class);
private final String _single;
private final String _multi;
private final boolean _affirmation;
/**
* Constructor. Supply values to compare.
*/
public MatchesExpression(Val val1, Val val2,
String single, String multi, String escape, boolean affirmation) {
super(val1, val2);
_single = single;
_multi = multi;
if (escape != null)
throw new IllegalArgumentException(_loc.get(
"escape-for-inmem-query-not-supported").getMessage());
_affirmation = affirmation;
}
protected boolean compare(Object o1, Object o2) {
if (o1 == null || o2 == null)
return false;
// case insensitive?
String str = o2.toString();
int idx = str.indexOf("(?i)");
boolean uncase = false;
if (idx != -1) {
uncase = true;
if (idx + 4 < str.length())
str = str.substring(0, idx) + str.substring(idx + 4);
else
str = str.substring(0, idx);
}
// now translate from the single and multi character escape
// sequences into an escape that conforms to the regexp syntax
str = Strings.replace(str, _multi, ".*");
str = Strings.replace(str, _single, ".");
SimpleRegex re = new SimpleRegex(str, uncase);
boolean matches = re.matches(o1.toString());
return _affirmation ? matches : !matches;
}
}