package org.drools.rule.builder.dialect.mvel;
import java.util.Map;
import org.drools.base.mvel.MVELCompilationUnit;
import org.drools.base.mvel.MVELSalienceExpression;
import org.drools.compiler.DescrBuildError;
import org.drools.compiler.Dialect;
import org.drools.rule.Declaration;
import org.drools.rule.MVELDialectRuntimeData;
import org.drools.rule.builder.RuleBuildContext;
import org.drools.rule.builder.SalienceBuilder;
public class MVELSalienceBuilder
implements
SalienceBuilder {
public void build(RuleBuildContext context) {
// pushing consequence LHS into the stack for variable resolution
context.getBuildStack().push( context.getRule().getLhs() );
try {
// This builder is re-usable in other dialects, so specify by name
MVELDialect dialect = (MVELDialect) context.getDialect( "mvel" );
Dialect.AnalysisResult analysis = dialect.analyzeExpression( context,
context.getRuleDescr(),
(String) context.getRuleDescr().getSalience(),
new Map[]{context.getDeclarationResolver().getDeclarationClasses(context.getRule()), context.getPackageBuilder().getGlobals()} );
Declaration[] previousDeclarations = (Declaration[]) context.getDeclarationResolver().getDeclarations(context.getRule()).values().toArray( new Declaration[context.getDeclarationResolver().getDeclarations(context.getRule()).size()] );
MVELCompilationUnit unit = dialect.getMVELCompilationUnit( (String) context.getRuleDescr().getSalience(),
analysis,
previousDeclarations,
null,
null,
context );
MVELSalienceExpression expr = new MVELSalienceExpression( unit,
dialect.getId() );
context.getRule().setSalience( expr );
MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData(dialect.getId() );
data.addCompileable( context.getRule(),
expr );
expr.compile( context.getPackageBuilder().getRootClassLoader() );
} catch ( final Exception e ) {
context.getErrors().add( new DescrBuildError( context.getParentDescr(),
context.getRuleDescr(),
null,
"Unable to build expression for 'salience' : " + e.getMessage() + "'" + context.getRuleDescr().getSalience() + "'" ) );
}
}
}