/*
* Copyright 2014 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.workbench.screens.guided.dtree.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.guided.dtree.shared.model.GuidedDecisionTree;
import org.drools.workbench.models.guided.dtree.shared.model.nodes.ActionInsertNode;
import org.drools.workbench.models.guided.dtree.shared.model.nodes.Node;
import org.drools.workbench.models.guided.dtree.shared.model.nodes.TypeNode;
import org.uberfire.commons.validation.PortablePreconditions;
/**
* A GuidedDecisionTree Visitor to identify fully qualified class names used by the GuidedDecisionTree
*/
public class GuidedDecisionTreeModelVisitor {
private final GuidedDecisionTree model;
private final String packageName;
private final Imports imports;
public GuidedDecisionTreeModelVisitor( final GuidedDecisionTree 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
factTypes.addAll( visitNode( model.getRoot() ) );
//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;
}
private Set<String> visitNode( final Node node ) {
if ( node == null ) {
return Collections.EMPTY_SET;
}
final Set<String> factTypes = new HashSet<String>();
if ( node instanceof TypeNode ) {
final TypeNode tn = (TypeNode) node;
factTypes.add( tn.getClassName() );
} else if ( node instanceof ActionInsertNode ) {
final ActionInsertNode an = (ActionInsertNode) node;
factTypes.add( an.getClassName() );
}
for ( Node child : node.getChildren() ) {
factTypes.addAll( visitNode( child ) );
}
return factTypes;
}
//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;
}
}