/*
* Copyright 2006 Red Hat, Inc. and/or its affiliates.
*
* 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.dialect.java;
import org.drools.compiler.rule.builder.RuleClassBuilder;
import org.drools.core.util.StringUtils;
import org.drools.compiler.lang.descr.RuleDescr;
import org.drools.compiler.rule.builder.RuleBuildContext;
import org.drools.core.spi.KnowledgeHelper;
public class JavaRuleClassBuilder
implements
RuleClassBuilder {
/* (non-Javadoc)
* @see org.kie.rule.builder.dialect.java.RuleClassBuilder#buildRule(org.kie.rule.builder.BuildContext, org.kie.rule.builder.dialect.java.BuildUtils, org.kie.lang.descr.RuleDescr)
*/
public String buildRule(final RuleBuildContext context) {
// If there is no compiled code, return
if ( context.getMethods().isEmpty() ) {
return null;
}
final String lineSeparator = System.getProperty( "line.separator" );
final StringBuilder buffer = new StringBuilder();
buffer.append("package ").append(context.getPkg().getName()).append(";").append(lineSeparator);
for (String s : context.getPkg().getImports().keySet()) {
buffer.append("import ").append(s).append(";");
}
buffer.append("import ").append(KnowledgeHelper.class.getName()).append(";");
for (String s : context.getPkg().getStaticImports()) {
buffer.append("import static ").append(s).append(";");
}
buffer.append( lineSeparator );
final RuleDescr ruleDescr = context.getRuleDescr();
buffer.append("public class ").append(StringUtils.ucFirst(ruleDescr.getClassName())).append(" {").append(lineSeparator);
buffer.append(" private static final long serialVersionUID = 510l;").append(lineSeparator);
for ( int i = 0, size = context.getMethods().size() - 1; i < size; i++ ) {
buffer.append(context.getMethods().get(i)).append(lineSeparator);
}
final String[] lines = buffer.toString().split( lineSeparator, -1 );
ruleDescr.setConsequenceOffset( lines.length );
buffer.append(context.getMethods().get(context.getMethods().size() - 1)).append(lineSeparator);
buffer.append( "}" );
return buffer.toString();
}
}