/*
* Copyright 2006 JBoss Inc
*
* Licensed 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.drools.compiler.rule.builder;
import org.drools.compiler.lang.descr.BaseDescr;
import org.drools.compiler.lang.descr.CollectDescr;
import org.drools.compiler.lang.descr.PatternDescr;
import org.drools.core.rule.Collect;
import org.drools.core.rule.Pattern;
import org.drools.core.rule.RuleConditionElement;
public class CollectBuilder
implements
RuleConditionBuilder {
public RuleConditionElement build(final RuleBuildContext context,
final BaseDescr descr) {
return build( context,
descr,
null );
}
public RuleConditionElement build(final RuleBuildContext context,
final BaseDescr descr,
final Pattern prefixPattern) {
final CollectDescr collectDescr = (CollectDescr) descr;
final PatternBuilder patternBuilder = (PatternBuilder) context.getDialect().getBuilder( PatternDescr.class );
final Pattern sourcePattern = (Pattern) patternBuilder.build( context,
collectDescr.getInputPattern() );
if ( sourcePattern == null ) {
return null;
}
final String className = "collect" + context.getNextId();
collectDescr.setClassMethodName( className );
Pattern resultPattern = (Pattern) context.getBuildStack().peek();
final Collect collect = new Collect( sourcePattern,
resultPattern );
return collect;
}
}