/*
* Copyright 2012 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.workbench.screens.guided.rule.backend.server;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.drools.workbench.models.datamodel.imports.Import;
import org.drools.workbench.models.datamodel.imports.Imports;
import org.drools.workbench.models.datamodel.rule.ActionInsertFact;
import org.drools.workbench.models.datamodel.rule.CompositeFactPattern;
import org.drools.workbench.models.datamodel.rule.CompositeFieldConstraint;
import org.drools.workbench.models.datamodel.rule.ConnectiveConstraint;
import org.drools.workbench.models.datamodel.rule.ExpressionFormLine;
import org.drools.workbench.models.datamodel.rule.ExpressionPart;
import org.drools.workbench.models.datamodel.rule.FactPattern;
import org.drools.workbench.models.datamodel.rule.FieldConstraint;
import org.drools.workbench.models.datamodel.rule.FromAccumulateCompositeFactPattern;
import org.drools.workbench.models.datamodel.rule.FromCollectCompositeFactPattern;
import org.drools.workbench.models.datamodel.rule.FromCompositeFactPattern;
import org.drools.workbench.models.datamodel.rule.IAction;
import org.drools.workbench.models.datamodel.rule.IFactPattern;
import org.drools.workbench.models.datamodel.rule.IPattern;
import org.drools.workbench.models.datamodel.rule.RuleModel;
import org.drools.workbench.models.datamodel.rule.SingleFieldConstraint;
import org.drools.workbench.models.datamodel.rule.SingleFieldConstraintEBLeftSide;
import org.uberfire.commons.validation.PortablePreconditions;
/**
* A RuleModel Visitor to identify fully qualified class names used by the RuleModel
*/
public class GuidedRuleModelVisitor {
private final RuleModel model;
private final String packageName;
private final Imports imports;
public GuidedRuleModelVisitor( final RuleModel model ) {
this.model = PortablePreconditions.checkNotNull( "model",
model );
this.packageName = model.getPackageName();
this.imports = model.getImports();
}
public Set<String> getConsumedModelClasses() {
final Set<String> factTypes = new HashSet<String>();
//Extract Fact Types from model
if ( model.lhs != null ) {
for ( int i = 0; i < model.lhs.length; i++ ) {
IPattern pattern = model.lhs[ i ];
factTypes.addAll( visit( pattern ) );
}
}
if ( model.rhs != null ) {
for ( int i = 0; i < model.rhs.length; i++ ) {
IAction action = model.rhs[ i ];
factTypes.addAll( visit( action ) );
}
}
//Convert Fact Types into Fully Qualified Class Names
final Set<String> fullyQualifiedClassNames = new HashSet<String>();
for ( String factType : factTypes ) {
fullyQualifiedClassNames.add( convertToFullyQualifiedClassName( factType ) );
}
return fullyQualifiedClassNames;
}
//Get the fully qualified class name of the fact type
private String convertToFullyQualifiedClassName( final String factType ) {
if ( factType.contains( "." ) ) {
return factType;
}
String fullyQualifiedClassName = null;
for ( Import imp : imports.getImports() ) {
if ( imp.getType().endsWith( factType ) ) {
fullyQualifiedClassName = imp.getType();
break;
}
}
if ( fullyQualifiedClassName == null ) {
fullyQualifiedClassName = packageName + "." + factType;
}
return fullyQualifiedClassName;
}
private Set<String> visit( Object o ) {
if ( o == null ) {
return Collections.EMPTY_SET;
}
if ( o instanceof FactPattern ) {
return visitFactPattern( (FactPattern) o );
} else if ( o instanceof CompositeFieldConstraint ) {
return visitCompositeFieldConstraint( (CompositeFieldConstraint) o );
} else if ( o instanceof SingleFieldConstraintEBLeftSide ) {
return visitSingleFieldConstraint( (SingleFieldConstraintEBLeftSide) o );
} else if ( o instanceof SingleFieldConstraint ) {
return visitSingleFieldConstraint( (SingleFieldConstraint) o );
} else if ( o instanceof ExpressionFormLine ) {
return visitExpressionFormLine( (ExpressionFormLine) o );
} else if ( o instanceof ConnectiveConstraint ) {
return visitConnectiveConstraint( (ConnectiveConstraint) o );
} else if ( o instanceof CompositeFactPattern ) {
return visitCompositeFactPattern( (CompositeFactPattern) o );
} else if ( o instanceof FromAccumulateCompositeFactPattern ) {
return visitFromAccumulateCompositeFactPattern( (FromAccumulateCompositeFactPattern) o );
} else if ( o instanceof FromCollectCompositeFactPattern ) {
return visitFromCollectCompositeFactPattern( (FromCollectCompositeFactPattern) o );
} else if ( o instanceof FromCompositeFactPattern ) {
return visitFromCompositeFactPattern( (FromCompositeFactPattern) o );
} else if ( o instanceof ActionInsertFact ) {
return visitActionInsertFact( (ActionInsertFact) o );
}
return Collections.EMPTY_SET;
}
private Set<String> visitActionInsertFact( ActionInsertFact afl ) {
final Set<String> factTypes = new HashSet<String>();
factTypes.add( afl.getFactType() );
return factTypes;
}
private Set<String> visitCompositeFactPattern( CompositeFactPattern pattern ) {
final Set<String> factTypes = new HashSet<String>();
if ( pattern.getPatterns() != null ) {
for ( IFactPattern fp : pattern.getPatterns() ) {
factTypes.addAll( visit( fp ) );
}
}
return factTypes;
}
private Set<String> visitCompositeFieldConstraint( CompositeFieldConstraint cfc ) {
final Set<String> factTypes = new HashSet<String>();
if ( cfc.getConstraints() != null ) {
for ( int i = 0; i < cfc.getConstraints().length; i++ ) {
FieldConstraint fc = cfc.getConstraints()[ i ];
factTypes.addAll( visit( fc ) );
}
}
return factTypes;
}
private Set<String> visitFactPattern( FactPattern pattern ) {
final Set<String> factTypes = new HashSet<String>();
factTypes.add( pattern.getFactType() );
for ( FieldConstraint fc : pattern.getFieldConstraints() ) {
factTypes.addAll( visit( fc ) );
}
return factTypes;
}
private Set<String> visitFromAccumulateCompositeFactPattern( FromAccumulateCompositeFactPattern pattern ) {
final Set<String> factTypes = new HashSet<String>();
factTypes.addAll( visit( pattern.getFactPattern() ) );
factTypes.addAll( visit( pattern.getSourcePattern() ) );
return factTypes;
}
private Set<String> visitFromCollectCompositeFactPattern( FromCollectCompositeFactPattern pattern ) {
final Set<String> factTypes = new HashSet<String>();
factTypes.addAll( visit( pattern.getFactPattern() ) );
factTypes.addAll( visit( pattern.getRightPattern() ) );
factTypes.addAll( visit( pattern.getExpression() ) );
return factTypes;
}
private Set<String> visitFromCompositeFactPattern( FromCompositeFactPattern pattern ) {
final Set<String> factTypes = new HashSet<String>();
factTypes.addAll( visit( pattern.getFactPattern() ) );
factTypes.addAll( visit( pattern.getExpression() ) );
return factTypes;
}
private Set<String> visitSingleFieldConstraint( SingleFieldConstraint sfc ) {
final Set<String> factTypes = new HashSet<String>();
if ( sfc.getFactType() != null ) {
factTypes.add( sfc.getFactType() );
}
factTypes.addAll( visit( sfc.getExpressionValue() ) );
if ( sfc.getConnectives() != null ) {
for ( int i = 0; i < sfc.getConnectives().length; i++ ) {
factTypes.addAll( visit( sfc.getConnectives()[ i ] ) );
}
}
return factTypes;
}
private Set<String> visitExpressionFormLine( ExpressionFormLine efl ) {
final Set<String> factTypes = new HashSet<String>();
for ( ExpressionPart part : efl.getParts() ) {
if ( part.getClassType() != null ) {
factTypes.add( part.getClassType() );
}
}
return factTypes;
}
private Set<String> visitConnectiveConstraint( ConnectiveConstraint cc ) {
final Set<String> factTypes = new HashSet<String>();
if ( cc.getFactType() != null ) {
factTypes.add( cc.getFactType() );
}
return factTypes;
}
private Set<String> visitSingleFieldConstraint( SingleFieldConstraintEBLeftSide sfexp ) {
final Set<String> factTypes = new HashSet<String>();
if ( sfexp.getFactType() != null ) {
factTypes.add( sfexp.getFactType() );
}
factTypes.addAll( visit( sfexp.getExpressionValue() ) );
factTypes.addAll( visit( sfexp.getExpressionLeftSide() ) );
if ( sfexp.getConnectives() != null ) {
for ( int i = 0; i < sfexp.getConnectives().length; i++ ) {
factTypes.addAll( visit( sfexp.getConnectives()[ i ] ) );
}
}
return factTypes;
}
}