/*
* Copyright 2015 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.
*
* 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.jbpm.process.builder.dialect.mvel;
import org.drools.compiler.compiler.DescrBuildError;
import org.drools.compiler.compiler.ReturnValueDescr;
import org.drools.compiler.rule.builder.PackageBuildContext;
import org.drools.compiler.rule.builder.dialect.mvel.MVELAnalysisResult;
import org.drools.compiler.rule.builder.dialect.mvel.MVELDialect;
import org.drools.core.base.mvel.MVELCompilationUnit;
import org.drools.core.rule.MVELDialectRuntimeData;
import org.jbpm.process.builder.ProcessBuildContext;
import org.jbpm.process.builder.ReturnValueEvaluatorBuilder;
import org.jbpm.process.core.ContextResolver;
import org.jbpm.process.core.context.variable.VariableScope;
import org.jbpm.process.instance.impl.MVELReturnValueEvaluator;
import org.jbpm.process.instance.impl.ReturnValueConstraintEvaluator;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class MVELReturnValueEvaluatorBuilder extends AbstractMVELBuilder
implements
ReturnValueEvaluatorBuilder {
public MVELReturnValueEvaluatorBuilder() {
}
public void build(final PackageBuildContext context,
final ReturnValueConstraintEvaluator constraintNode,
final ReturnValueDescr descr,
final ContextResolver contextResolver) {
String text = descr.getText();
Map<String, Class<?>> variables = new HashMap<String,Class<?>>();
try {
MVELDialect dialect = (MVELDialect) context.getDialect( "mvel" );
MVELAnalysisResult analysis = getAnalysis(context, descr, dialect, text, variables);
if ( analysis == null ) {
// not possible to get the analysis results
return;
}
buildReturnValueEvaluator(context,
constraintNode,
descr,
contextResolver,
dialect,
analysis,
text,
variables);
} catch ( final Exception e ) {
context.getErrors().add( new DescrBuildError( context.getParentDescr(),
descr,
null,
"Unable to build expression for 'constraint' " + descr.getText() + "': " + e ) );
}
}
public void buildReturnValueEvaluator(final PackageBuildContext context,
final ReturnValueConstraintEvaluator constraintNode,
final ReturnValueDescr descr,
final ContextResolver contextResolver,
final MVELDialect dialect,
final MVELAnalysisResult analysis,
final String text,
Map<String, Class<?>> variables) throws Exception {
Set<String> variableNames = analysis.getNotBoundedIdentifiers();
if (contextResolver != null) {
for (String variableName: variableNames) {
if ( analysis.getMvelVariables().keySet().contains( variableName ) || variableName.equals( "kcontext" ) || variableName.equals( "context" ) ) {
continue;
}
VariableScope variableScope = (VariableScope) contextResolver.resolveContext(VariableScope.VARIABLE_SCOPE, variableName);
if (variableScope == null) {
context.getErrors().add(
new DescrBuildError(
context.getParentDescr(),
descr,
null,
"Could not find variable '" + variableName + "' for action '" + descr.getText() + "'" ) );
} else {
variables.put(variableName,
context.getDialect().getTypeResolver().resolveType(variableScope.findVariable(variableName).getType().getStringType()));
}
}
}
MVELCompilationUnit unit = dialect.getMVELCompilationUnit( text,
analysis,
null,
null,
variables,
context,
"context",
org.kie.api.runtime.process.ProcessContext.class,
false,
MVELCompilationUnit.Scope.EXPRESSION);
// MVELReturnValueExpression expr = new MVELReturnValueExpression( unit, context.getDialect().getId() );
MVELReturnValueEvaluator expr = new MVELReturnValueEvaluator( unit,
dialect.getId() );
// expr.setVariableNames(variableNames);
constraintNode.setEvaluator( expr );
MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData( dialect.getId() );
data.addCompileable( constraintNode,
expr );
expr.compile( data );
collectTypes("MVELReturnValue", analysis, (ProcessBuildContext) context);
}
}