/*
* 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.modeldriven.ui;
import java.util.ArrayList;
import java.util.List;
import org.drools.guvnor.client.common.DirtyableFlexTable;
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.modeldriven.HumanReadable;
import org.drools.guvnor.client.resources.Images;
import org.drools.ide.common.client.modeldriven.DropDownData;
import org.drools.ide.common.client.modeldriven.MethodInfo;
import org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine;
import org.drools.ide.common.client.modeldriven.brl.ActionCallMethod;
import org.drools.ide.common.client.modeldriven.brl.ActionFieldFunction;
import org.drools.ide.common.client.modeldriven.brl.ActionInsertFact;
import org.drools.ide.common.client.modeldriven.brl.FactPattern;
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.Command;
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.Widget;
/**
* This widget is for modifying facts bound to a variable.
*
* @author isabel
*
*/
public class ActionCallMethodWidget extends RuleModellerWidget {
private Constants constants = GWT.create( Constants.class );
private static Images images = (Images) GWT.create( Images.class );
final private ActionCallMethod model;
final private DirtyableFlexTable layout;
private boolean isBoundFact = false;
private String[] fieldCompletionTexts;
private String[] fieldCompletionValues;
private String variableClass;
private boolean readOnly;
public ActionCallMethodWidget(RuleModeller mod,
ActionCallMethod set) {
this( mod,
set,
null );
}
public ActionCallMethodWidget(RuleModeller mod,
ActionCallMethod set,
Boolean readOnly) {
super( mod );
this.model = set;
this.layout = new DirtyableFlexTable();
layout.setStyleName( "model-builderInner-Background" ); // NON-NLS
SuggestionCompletionEngine completions = this.getModeller().getSuggestionCompletions();
if ( completions.isGlobalVariable( set.variable ) ) {
List<MethodInfo> infos = completions.getMethodInfosForGlobalVariable( set.variable );
this.fieldCompletionTexts = new String[infos.size()];
this.fieldCompletionValues = new String[infos.size()];
int i = 0;
for ( MethodInfo info : infos ) {
this.fieldCompletionTexts[i] = info.getName();
this.fieldCompletionValues[i] = info.getNameWithParameters();
i++;
}
this.variableClass = (String) completions.getGlobalVariable( set.variable );
} else {
FactPattern pattern = mod.getModel().getBoundFact( set.variable );
if ( pattern != null ) {
List<String> methodList = completions.getMethodNames( pattern.factType );
fieldCompletionTexts = new String[methodList.size()];
fieldCompletionValues = new String[methodList.size()];
int i = 0;
for ( String methodName : methodList ) {
fieldCompletionTexts[i] = methodName;
fieldCompletionValues[i] = methodName;
i++;
}
this.variableClass = pattern.factType;
this.isBoundFact = true;
} else {
/*
* if the call method is applied on a bound variable created in the rhs
*/
ActionInsertFact patternRhs = mod.getModel().getRhsBoundFact( set.variable );
if ( patternRhs != null ) {
List<String> methodList = completions.getMethodNames( patternRhs.factType );
fieldCompletionTexts = new String[methodList.size()];
fieldCompletionValues = new String[methodList.size()];
int i = 0;
for ( String methodName : methodList ) {
fieldCompletionTexts[i] = methodName;
fieldCompletionValues[i] = methodName;
i++;
}
this.variableClass = patternRhs.factType;
this.isBoundFact = true;
}
}
}
if ( readOnly == null ) {
this.readOnly = !completions.containsFactType( this.variableClass );
} else {
this.readOnly = readOnly;
}
if ( this.readOnly ) {
layout.addStyleName( "editor-disabled-widget" );
}
doLayout();
initWidget( this.layout );
}
private void doLayout() {
layout.clear();
layout.setWidget( 0,
0,
getSetterLabel() );
DirtyableFlexTable inner = new DirtyableFlexTable();
for ( int i = 0; i < model.fieldValues.length; i++ ) {
ActionFieldFunction val = model.getFieldValue( i );
inner.setWidget( i,
0,
fieldSelector( val ) );
inner.setWidget( i,
1,
valueEditor( val ) );
}
layout.setWidget( 0,
1,
inner );
}
private Widget getSetterLabel() {
HorizontalPanel horiz = new HorizontalPanel();
if ( model.state == ActionCallMethod.TYPE_UNDEFINED ) {
Image edit = new ImageButton( images.addFieldToFact() );
edit.setTitle( constants.AddAnotherFieldToThisSoYouCanSetItsValue() );
edit.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
Widget w = (Widget) event.getSource();
showAddFieldPopup( w );
}
} );
horiz.add( new SmallLabel( HumanReadable.getActionDisplayName( "call" ) + " [" + model.variable + "]" ) ); // NON-NLS
if ( !this.readOnly ) {
horiz.add( edit );
}
} else {
horiz.add( new SmallLabel( HumanReadable.getActionDisplayName( "call" ) + " [" + model.variable + "." + model.methodName + "]" ) ); // NON-NLS
}
return horiz;
}
protected void showAddFieldPopup(Widget w) {
final SuggestionCompletionEngine completions = this.getModeller().getSuggestionCompletions();
final FormStylePopup popup = new FormStylePopup( images.newexWiz(),
constants.ChooseAMethodToInvoke() );
final ListBox box = new ListBox();
box.addItem( "..." );
for ( int i = 0; i < fieldCompletionTexts.length; i++ ) {
box.addItem( fieldCompletionTexts[i],
fieldCompletionValues[i] );
}
box.setSelectedIndex( 0 );
popup.addAttribute( constants.ChooseAMethodToInvoke(),
box );
box.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
model.state = ActionCallMethod.TYPE_DEFINED;
String methodName = box.getItemText( box.getSelectedIndex() );
String methodNameWithParams = box.getValue( box.getSelectedIndex() );
model.methodName = methodName;
List<String> fieldList = new ArrayList<String>();
fieldList.addAll( completions.getMethodParams( variableClass,
methodNameWithParams ) );
int i = 0;
for ( String fieldParameter : fieldList ) {
model.addFieldValue( new ActionFieldFunction( methodName,
String.valueOf( i ),
fieldParameter ) );
i++;
}
getModeller().refreshWidget();
popup.hide();
}
} );
popup.setPopupPosition( w.getAbsoluteLeft(),
w.getAbsoluteTop() );
popup.show();
}
private Widget valueEditor(final ActionFieldFunction val) {
SuggestionCompletionEngine completions = this.getModeller().getSuggestionCompletions();
String type = "";
if ( completions.isGlobalVariable( this.model.variable ) ) {
type = completions.getGlobalVariable( this.model.variable );
} else {
type = this.getModeller().getModel().getBindingType( this.model.variable );
if ( type == null ) {
type = this.getModeller().getModel().getRhsBoundFact( this.model.variable ).factType;
}
}
DropDownData enums = completions.getEnums( type,
this.model.fieldValues,
val.field );
return new MethodParameterValueEditor( val,
enums,
this.getModeller(),
val.type,
new Command() {
public void execute() {
setModified( true );
}
} );
}
private Widget fieldSelector(final ActionFieldFunction val) {
return new SmallLabel( val.type );
}
/**
* This returns true if the values being set are on a fact.
*/
public boolean isBoundFact() {
return isBoundFact;
}
public boolean isDirty() {
return layout.hasDirty();
}
@Override
public boolean isReadOnly() {
return this.readOnly;
}
}