/*
* Copyright 2010 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.ruleeditor;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.drools.factconstraints.client.ConstraintConfiguration;
import org.drools.factconstraints.client.helper.ConstraintsContainer;
import org.drools.guvnor.client.common.FormStylePopup;
import org.drools.guvnor.client.common.ImageButton;
import org.drools.guvnor.client.common.SmallLabel;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.packages.SuggestionCompletionCache;
import org.drools.guvnor.client.resources.Images;
import org.drools.guvnor.client.rpc.RuleAsset;
import org.drools.guvnor.client.rpc.WorkingSetConfigData;
import org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.VerticalPanel;
/**
*
* @author esteban
*/
public class FactsConstraintsEditorPanel extends Composite {
private Constants constants = GWT.create( Constants.class );
private static Images images = GWT.create( Images.class );
private static int idGenerator = 0;
private ListBox factsCombo = new ListBox( false );
private ListBox fieldsCombo = new ListBox( false );
private ListBox constraintsCombo = new ListBox( false );
private VerticalPanel vpConstraintConf = new VerticalPanel();
private boolean validFactsChanged = true;
private Map<String, ConstraintConfiguration> contraintsMap = new HashMap<String, ConstraintConfiguration>();
private final RuleAsset workingSet;
private final WorkingSetEditor workingSetEditor;
public FactsConstraintsEditorPanel(WorkingSetEditor workingSetEditor) {
this.workingSetEditor = workingSetEditor;
this.workingSet = workingSetEditor.getWorkingSet();
factsCombo.setVisibleItemCount( 1 );
fieldsCombo.setVisibleItemCount( 1 );
constraintsCombo.setVisibleItemCount( 5 );
factsCombo.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
fillSelectedFactFields();
}
} );
fieldsCombo.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
fillFieldConstrains();
}
} );
Image addNewConstraint = new ImageButton( images.newItem() );
addNewConstraint.setTitle( constants.AddNewConstraint() );
addNewConstraint.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
showNewConstrainPop();
}
} );
Image removeConstraint = new Image( images.trash() );
removeConstraint.setTitle( constants.removeConstraint() );
removeConstraint.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
removeConstraint();
}
} );
final FlexTable table = new FlexTable();
VerticalPanel vp = new VerticalPanel();
vp.add( new SmallLabel( constants.FactTypes() ) );
vp.add( factsCombo );
table.setWidget( 0,
0,
vp );
vp = new VerticalPanel();
vp.add( new SmallLabel( constants.Field() ) );
vp.add( fieldsCombo );
table.setWidget( 1,
0,
vp );
vp = new VerticalPanel();
HorizontalPanel hp = new HorizontalPanel();
vp.add( new SmallLabel( constants.Constraints() ) );
hp.add( constraintsCombo );
VerticalPanel btnPanel = new VerticalPanel();
btnPanel.add( addNewConstraint );
btnPanel.add( removeConstraint );
hp.add( btnPanel );
vp.add( hp );
table.setWidget( 2,
0,
vp );
table.getFlexCellFormatter().setRowSpan( 2,
0,
3 );
constraintsCombo.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
showConstraintConfig();
}
} );
vpConstraintConf.add( new SmallLabel( constants.ConstraintsParameters() ) );
vpConstraintConf.add( new SmallLabel( "" ) );
table.setWidget( 0,
1,
vpConstraintConf );
table.getFlexCellFormatter().setRowSpan( 0,
1,
5 );
fillSelectedFacts();
fillSelectedFactFields();
fillFieldConstrains();
showConstraintConfig();
this.initWidget( table );
}
protected final void fillSelectedFacts() {
if ( validFactsChanged ) {
String s = factsCombo.getSelectedIndex() != -1 ? factsCombo.getItemText( factsCombo.getSelectedIndex() ) : "";
factsCombo.clear();
validFactsChanged = false;
for ( int i = 0; i < workingSetEditor.getValidFactsListBox().getItemCount(); i++ ) {
String itemText = workingSetEditor.getValidFactsListBox().getItemText( i );
factsCombo.addItem( itemText );
if ( s.equals( itemText ) ) {
factsCombo.setSelectedIndex( i );
}
}
if ( factsCombo.getSelectedIndex() == -1 && factsCombo.getItemCount() > 0 ) {
factsCombo.setSelectedIndex( 0 );
}
fillSelectedFactFields();
}
}
private void fillSelectedFactFields() {
if ( factsCombo.getSelectedIndex() != -1 ) {
String fact = factsCombo.getItemText( factsCombo.getSelectedIndex() );
fieldsCombo.clear();
for ( String field : getCompletionEngine().getFieldCompletions( fact ) ) {
fieldsCombo.addItem( field );
}
}
if ( fieldsCombo.getSelectedIndex() == -1 && fieldsCombo.getItemCount() > 0 ) {
fieldsCombo.setSelectedIndex( 0 );
}
fillFieldConstrains();
}
private void fillFieldConstrains() {
if ( fieldsCombo.getSelectedIndex() != -1 ) {
String fieldName = fieldsCombo.getItemText( fieldsCombo.getSelectedIndex() );
String factField = factsCombo.getItemText( factsCombo.getSelectedIndex() );
constraintsCombo.clear();
contraintsMap.clear();
for ( ConstraintConfiguration c : this.workingSetEditor.getConstraintsConstrainer().getConstraints( factField,
fieldName ) ) {
constraintsCombo.addItem( c.getConstraintName(),
addContrainsMap( c ) );
}
vpConstraintConf.remove( vpConstraintConf.getWidgetCount() - 1 );
vpConstraintConf.add( new SmallLabel() );
}
showConstraintConfig();
}
synchronized private String addContrainsMap(ConstraintConfiguration c) {
String constraintId = String.valueOf( idGenerator++ );
contraintsMap.put( constraintId,
c );
return constraintId;
}
protected void removeConstraint() {
if ( constraintsCombo.getSelectedIndex() != -1 ) {
ConstraintConfiguration c = contraintsMap.get( constraintsCombo.getValue( constraintsCombo.getSelectedIndex() ) );
((WorkingSetConfigData) workingSet.content).constraints = this.workingSetEditor.getConstraintsConstrainer().removeConstraint( c );
}
fillFieldConstrains();
}
private void showConstraintConfig() {
if ( constraintsCombo.getItemCount() == 0 ) {
vpConstraintConf.remove( vpConstraintConf.getWidgetCount() - 1 );
vpConstraintConf.add( new SmallLabel() );
return;
}
if ( constraintsCombo.getSelectedIndex() != -1 ) {
ConstraintConfiguration c = contraintsMap.get( constraintsCombo.getValue( constraintsCombo.getSelectedIndex() ) );
ConstraintEditor editor = new ConstraintEditor( c );
vpConstraintConf.remove( vpConstraintConf.getWidgetCount() - 1 );
vpConstraintConf.add( editor );
}
}
private void showNewConstrainPop() {
final FormStylePopup pop = new FormStylePopup( images.config(),
constants.AddNewConstraint() );
final Button addbutton = new Button( constants.OK() );
final ListBox consDefsCombo = new ListBox( false );
consDefsCombo.setVisibleItemCount( 5 );
addbutton.setTitle( constants.AddNewConstraint() );
List<String> names = new ArrayList<String>( ConstraintsContainer.getAllConfigurations().keySet() );
Collections.sort( names );
for ( String name : names ) {
consDefsCombo.addItem( name );
}
addbutton.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
String name = consDefsCombo.getItemText( consDefsCombo.getSelectedIndex() );
ConstraintConfiguration config = ConstraintsContainer.getEmptyConfiguration( name );
if ( config != null ) {
String factName = factsCombo.getItemText( factsCombo.getSelectedIndex() );
String fieldName = fieldsCombo.getItemText( fieldsCombo.getSelectedIndex() );
config.setFactType( factName );
config.setFieldName( fieldName );
if ( ((WorkingSetConfigData) workingSet.content).constraints == null ) {
((WorkingSetConfigData) workingSet.content).constraints = new ArrayList<ConstraintConfiguration>();
}
((WorkingSetConfigData) workingSet.content).constraints.add( config );
constraintsCombo.addItem( config.getConstraintName(),
addContrainsMap( config ) );
workingSetEditor.getConstraintsConstrainer().addConstraint( config );
}
pop.hide();
}
} );
pop.addAttribute( constants.WillExtendTheFollowingRuleCalled(),
consDefsCombo );
pop.addAttribute( "",
addbutton );
pop.show();
}
private SuggestionCompletionEngine getCompletionEngine() {
return SuggestionCompletionCache.getInstance().getEngineFromCache( workingSet.metaData.packageName );
}
public void notifyValidFactsChanged() {
this.validFactsChanged = true;
}
}