/*
* Copyright 2011 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.guvnor.client.widgets.wizards.assets.decisiontable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.Map;
import org.drools.guvnor.client.factmodel.ModelNameHelper;
import org.drools.guvnor.client.widgets.wizards.assets.NewAssetWizardContext;
import org.drools.guvnor.client.widgets.wizards.assets.decisiontable.events.ActionInsertFactFieldsDefinedEvent;
import org.drools.guvnor.client.widgets.wizards.assets.decisiontable.events.ActionInsertFactPatternsDefinedEvent;
import org.drools.guvnor.client.widgets.wizards.assets.decisiontable.events.DuplicatePatternsEvent;
import org.drools.ide.common.client.modeldriven.brl.BaseSingleFieldConstraint;
import org.drools.ide.common.client.modeldriven.dt52.ActionCol52;
import org.drools.ide.common.client.modeldriven.dt52.ActionInsertFactCol52;
import org.drools.ide.common.client.modeldriven.dt52.GuidedDecisionTable52;
import org.drools.ide.common.client.modeldriven.dt52.Pattern52;
import com.google.gwt.event.shared.EventBus;
/**
* A page for the guided Decision Table Wizard to define new Facts and fields.
* This page does not use the GuidedDecisionTable model directly; instead
* maintaining its own Pattern-to-Action associations.
*/
public class ActionInsertFactFieldsPage extends AbstractGuidedDecisionTableWizardPage
implements
ActionInsertFactFieldsPageView.Presenter,
DuplicatePatternsEvent.Handler,
ActionInsertFactPatternsDefinedEvent.Handler,
ActionInsertFactFieldsDefinedEvent.Handler {
private final ModelNameHelper modelNameHelper = new ModelNameHelper();
private ActionInsertFactFieldsPageView view;
//GuidedDecisionTable52 maintains a single collection of Actions, linked to patterns by boundName. Thus if multiple
//patterns are bound to the same name we cannot distinguish which Actions relate to which Patterns. The Wizard therefore
//maintains it's own internal association of Patterns to Actions. IdentityHashMap is used as it is possible to have two
//identically defined Patterns (i.e. they have the same property values) although they represent different instances.
//A WeakIdentityHashMap would have been more appropriate, however JavaScript has no concept of a weak reference, and so
//it can't be implement in GWT. In the absence of such a Map an Event is raised by FactPatternsPage when a Pattern is
//removed that is handled here to synchronise the Pattern lists.
private Map<ActionInsertFactFieldsPattern, List<ActionInsertFactCol52>> patternToActionsMap = new IdentityHashMap<ActionInsertFactFieldsPattern, List<ActionInsertFactCol52>>();
public ActionInsertFactFieldsPage(NewAssetWizardContext context,
GuidedDecisionTable52 dtable,
EventBus eventBus,
Validator validator) {
super( context,
dtable,
eventBus,
validator );
//Set-up validator for the pattern-to-action mapping voodoo
getValidator().setPatternToActionInsertFactFieldsMap( patternToActionsMap );
this.view = new ActionInsertFactFieldsPageViewImpl( getValidator() );
//Wire-up the events
eventBus.addHandler( DuplicatePatternsEvent.TYPE,
this );
eventBus.addHandler( ActionInsertFactFieldsDefinedEvent.TYPE,
this );
eventBus.addHandler( ActionInsertFactPatternsDefinedEvent.TYPE,
this );
}
public String getTitle() {
return constants.DecisionTableWizardActionInsertFacts();
}
public void initialise() {
if ( sce == null ) {
return;
}
view.setPresenter( this );
//Available types
List<String> availableTypes = Arrays.asList( sce.getFactTypes() );
view.setAvailableFactTypes( availableTypes );
//Existing ActionInsertFactCols (should be empty for a new Decision Table)
for ( ActionCol52 a : dtable.getActionCols() ) {
if ( a instanceof ActionInsertFactCol52 ) {
ActionInsertFactCol52 aif = (ActionInsertFactCol52) a;
ActionInsertFactFieldsPattern p = lookupExistingInsertFactPattern( aif.getBoundName() );
List<ActionInsertFactCol52> actions = patternToActionsMap.get( p );
getValidator().addActionPattern( p );
actions.add( aif );
}
}
view.setChosenPatterns( new ArrayList<ActionInsertFactFieldsPattern>( patternToActionsMap.keySet() ) );
content.setWidget( view );
}
private ActionInsertFactFieldsPattern lookupExistingInsertFactPattern(String boundName) {
for ( ActionInsertFactFieldsPattern p : patternToActionsMap.keySet() ) {
if ( p.getBoundName().equals( boundName ) ) {
return p;
}
}
ActionInsertFactFieldsPattern p = new ActionInsertFactFieldsPattern();
patternToActionsMap.put( p,
new ArrayList<ActionInsertFactCol52>() );
return p;
}
public void prepareView() {
//Nothing to do here, this page is self-contained
}
public boolean isComplete() {
//Do all Patterns have unique bindings?
boolean arePatternBindingsUnique = getValidator().arePatternBindingsUnique();
//Signal duplicates to other pages
DuplicatePatternsEvent event = new DuplicatePatternsEvent( arePatternBindingsUnique );
eventBus.fireEvent( event );
//Are all Patterns defined?
boolean areActionInsertPatternsDefined = true;
for ( Pattern52 p : patternToActionsMap.keySet() ) {
if ( !getValidator().isPatternValid( p ) ) {
areActionInsertPatternsDefined = false;
break;
}
}
//Signal Action Insert Fact Patterns to other pages
ActionInsertFactPatternsDefinedEvent eventFactPatterns = new ActionInsertFactPatternsDefinedEvent( areActionInsertPatternsDefined );
eventBus.fireEvent( eventFactPatterns );
//Are all Actions defined?
boolean areActionInsertFieldsDefined = true;
for ( List<ActionInsertFactCol52> actions : patternToActionsMap.values() ) {
for ( ActionInsertFactCol52 a : actions ) {
if ( !getValidator().isActionValid( a ) ) {
areActionInsertFieldsDefined = false;
break;
}
}
}
//Signal Action Insert Fact Fields to other pages
ActionInsertFactFieldsDefinedEvent eventFactFields = new ActionInsertFactFieldsDefinedEvent( areActionInsertFieldsDefined );
eventBus.fireEvent( eventFactFields );
return arePatternBindingsUnique && areActionInsertPatternsDefined && areActionInsertFieldsDefined;
}
public void onDuplicatePatterns(DuplicatePatternsEvent event) {
view.setArePatternBindingsUnique( event.getArePatternBindingsUnique() );
}
public void onActionInsertFactPatternsDefined(ActionInsertFactPatternsDefinedEvent event) {
view.setAreActionInsertFactPatternsDefined( event.getAreActionInsertFactPatternsDefined() );
}
public void onActionInsertFactFieldsDefined(ActionInsertFactFieldsDefinedEvent event) {
view.setAreActionInsertFactFieldsDefined( event.getAreActionInsertFactFieldsDefined() );
}
public void addPattern(ActionInsertFactFieldsPattern pattern) {
patternToActionsMap.put( pattern,
new ArrayList<ActionInsertFactCol52>() );
getValidator().addActionPattern( pattern );
}
public void removePattern(ActionInsertFactFieldsPattern pattern) {
patternToActionsMap.remove( pattern );
getValidator().removeActionPattern( pattern );
}
public void selectPattern(ActionInsertFactFieldsPattern pattern) {
//Add fields available
String type = pattern.getFactType();
String[] fieldNames = sce.getFieldCompletions( type );
List<AvailableField> availableFields = new ArrayList<AvailableField>();
for ( String fieldName : fieldNames ) {
String fieldType = modelNameHelper.getUserFriendlyTypeName( sce.getFieldClassName( type,
fieldName ) );
AvailableField field = new AvailableField( fieldName,
fieldType,
BaseSingleFieldConstraint.TYPE_LITERAL );
availableFields.add( field );
}
view.setAvailableFields( availableFields );
//Set fields already chosen
List<ActionInsertFactCol52> actionsForPattern = patternToActionsMap.get( pattern );
if ( actionsForPattern == null ) {
actionsForPattern = new ArrayList<ActionInsertFactCol52>();
patternToActionsMap.put( pattern,
actionsForPattern );
}
view.setChosenFields( actionsForPattern );
}
@Override
public void makeResult(GuidedDecisionTable52 dtable) {
for ( ActionInsertFactFieldsPattern p : patternToActionsMap.keySet() ) {
String factType = p.getFactType();
String boundName = p.getBoundName();
boolean isLogicalInsert = p.isInsertedLogically();
for ( ActionInsertFactCol52 aif : patternToActionsMap.get( p ) ) {
aif.setFactType( factType );
aif.setBoundName( boundName );
aif.setInsertLogical( isLogicalInsert );
dtable.getActionCols().add( aif );
}
}
}
}