/*
* 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.rule.builder;
import java.util.Stack;
import org.drools.compiler.Dialect;
import org.drools.compiler.DialectCompiletimeRegistry;
import org.drools.compiler.PackageBuilder;
import org.drools.lang.descr.QueryDescr;
import org.drools.lang.descr.RuleDescr;
import org.drools.rule.Package;
import org.drools.rule.Query;
import org.drools.rule.Rule;
import org.drools.rule.RuleConditionElement;
import org.drools.spi.DeclarationScopeResolver;
/**
* A context for the current build
*/
public class RuleBuildContext extends PackageBuildContext {
// current rule
private Rule rule;
// a stack for the rule building used
// for declarations resolution
private Stack<RuleConditionElement> buildStack;
// current Rule descriptor
private RuleDescr ruleDescr;
// available declarationResolver
private DeclarationScopeResolver declarationResolver;
// a simple counter for patterns
private int patternId = -1;
private DroolsCompilerComponentFactory compilerFactory;
/**
* Default constructor
*/
public RuleBuildContext(final PackageBuilder pkgBuilder,
final RuleDescr ruleDescr,
final DialectCompiletimeRegistry dialectCompiletimeRegistry,
final Package pkg,
final Dialect defaultDialect) {
this.buildStack = new Stack<RuleConditionElement>();
this.declarationResolver = new DeclarationScopeResolver( pkgBuilder.getGlobals(),
this.buildStack );
this.declarationResolver.setPackage( pkg );
this.ruleDescr = ruleDescr;
if ( ruleDescr instanceof QueryDescr ) {
this.rule = new Query( ruleDescr.getName() );
} else {
this.rule = new Rule( ruleDescr.getName() );
}
this.rule.setPackage( pkg.getName() );
this.rule.setDialect( ruleDescr.getDialect() );
init(pkgBuilder, pkg, ruleDescr, dialectCompiletimeRegistry, defaultDialect, this.rule );
if ( this.rule.getDialect() == null ) {
this.rule.setDialect( getDialect().getId() );
}
Dialect dialect = getDialect();
if ( dialect != null ) {
dialect.init( ruleDescr );
}
compilerFactory = pkgBuilder.getPackageBuilderConfiguration().getComponentFactory();
}
/**
* Returns the current Rule being built
* @return
*/
public Rule getRule() {
return this.rule;
}
/**
* Returns the current RuleDescriptor
* @return
*/
public RuleDescr getRuleDescr() {
return this.ruleDescr;
}
/**
* Returns the available declarationResolver instance
* @return
*/
public DeclarationScopeResolver getDeclarationResolver() {
return this.declarationResolver;
}
/**
* Sets the available declarationResolver instance
* @param variables
*/
public void setDeclarationResolver(final DeclarationScopeResolver variables) {
this.declarationResolver = variables;
}
public int getPatternId() {
return this.patternId;
}
public int getNextPatternId() {
return ++this.patternId;
}
public void setPatternId(final int patternId) {
this.patternId = patternId;
}
public Stack<RuleConditionElement> getBuildStack() {
return this.buildStack;
}
public DroolsCompilerComponentFactory getCompilerFactory() {
return compilerFactory;
}
public void setCompilerFactory(DroolsCompilerComponentFactory compilerFactory) {
this.compilerFactory = compilerFactory;
}
}