/*
* 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.client.widget;
import java.util.List;
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.event.shared.EventBus;
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;
import org.drools.workbench.models.datamodel.oracle.DropDownData;
import org.drools.workbench.models.datamodel.oracle.MethodInfo;
import org.drools.workbench.models.datamodel.rule.ActionCallMethod;
import org.drools.workbench.models.datamodel.rule.ActionFieldFunction;
import org.drools.workbench.models.datamodel.rule.ActionInsertFact;
import org.drools.workbench.models.datamodel.rule.FactPattern;
import org.drools.workbench.models.datamodel.rule.SingleFieldConstraint;
import org.drools.workbench.screens.guided.rule.client.editor.MethodParameterValueEditor;
import org.drools.workbench.screens.guided.rule.client.editor.RuleModeller;
import org.drools.workbench.screens.guided.rule.client.resources.GuidedRuleEditorResources;
import org.drools.workbench.screens.guided.rule.client.resources.images.GuidedRuleEditorImages508;
import org.drools.workbench.screens.guided.rule.client.util.FieldNatureUtil;
import org.kie.uberfire.client.common.DirtyableFlexTable;
import org.kie.uberfire.client.common.SmallLabel;
import org.kie.uberfire.client.common.popups.FormStylePopup;
import org.kie.workbench.common.widgets.client.datamodel.AsyncPackageDataModelOracle;
import org.kie.workbench.common.widgets.client.resources.HumanReadable;
import org.uberfire.client.callbacks.Callback;
/**
* This widget is for modifying facts bound to a variable.
*/
public class ActionCallMethodWidget extends RuleModellerWidget {
final private ActionCallMethod model;
final private DirtyableFlexTable layout = new DirtyableFlexTable();
private final AsyncPackageDataModelOracle oracle;
private boolean isBoundFact = false;
private String[] fieldCompletionTexts;
private String[] fieldCompletionValues;
private String variableClass;
private boolean readOnly;
private boolean isFactTypeKnown = false;
private static final String READ_ONLY_STYLE_NAME = "editor-disabled-widget";
public ActionCallMethodWidget( final RuleModeller mod,
final EventBus eventBus,
final ActionCallMethod actionCallMethod,
final Boolean readOnly ) {
super( mod,
eventBus );
model = actionCallMethod;
oracle = this.getModeller().getDataModelOracle();
layout.setStyleName( "model-builderInner-Background" ); // NON-NLS
getMethodInfos();
checkIfReadOnly( readOnly );
initWidget( layout );
}
private void getMethodInfos() {
if ( oracle.isGlobalVariable( model.getVariable() ) ) {
getMethodInfosForGlobalVariable();
} else {
getMethodInfosForBasicFactType();
}
}
private void checkIfReadOnly( Boolean readOnly ) {
if ( readOnly == null ) {
this.readOnly = !this.isFactTypeKnown;
} else {
this.readOnly = readOnly;
}
if ( this.readOnly ) {
layout.addStyleName( READ_ONLY_STYLE_NAME );
} else {
layout.removeStyleName( READ_ONLY_STYLE_NAME );
}
doLayout();
}
private void getMethodInfosForBasicFactType() {
String factType = getFactTypeLHS();
if ( factType == null ) {
factType = getFactTypeFromRHS();
}
if ( factType == null ) {
factType = getFactTypeFromLHSField();
}
if ( factType != null ) {
setMethodInfos( factType );
} else {
checkIfReadOnly( null );
}
}
private String getFactTypeFromLHSField() {
SingleFieldConstraint lhsBoundField = modeller.getModel().getLHSBoundField( model.getVariable() );
if ( lhsBoundField != null ) {
return oracle.getFieldClassName( lhsBoundField.getFactType(), lhsBoundField.getFieldName() );
} else {
return null;
}
}
private String getFactTypeFromRHS() {
ActionInsertFact rhsBoundFact = modeller.getModel().getRHSBoundFact( model.getVariable() );
if ( rhsBoundFact != null ) {
return rhsBoundFact.getFactType();
}
return null;
}
private String getFactTypeLHS() {
FactPattern lhsBoundFact = modeller.getModel().getLHSBoundFact( model.getVariable() );
if ( lhsBoundFact != null ) {
return lhsBoundFact.getFactType();
}
return null;
}
private void setMethodInfos( final String factType ) {
oracle.getMethodInfos( factType,
new Callback<List<MethodInfo>>() {
@Override
public void callback( final List<MethodInfo> methodInfos ) {
checkIfFactTypeKnown( methodInfos );
checkIfReadOnly( null );
setMethodInfos( methodInfos, factType );
isBoundFact = true;
}
} );
}
private void checkIfFactTypeKnown( List<MethodInfo> methodInfos ) {
if ( methodInfos != null ) {
isFactTypeKnown = true;
}
if ( !isFactTypeKnown ) {
this.isFactTypeKnown = oracle.isFactTypeRecognized( this.variableClass );
}
fireEvent( new FactTypeKnownValueChangeEvent() );
}
private void setMethodInfos( List<MethodInfo> methodInfos,
String factType ) {
this.fieldCompletionTexts = new String[ methodInfos.size() ];
this.fieldCompletionValues = new String[ methodInfos.size() ];
int i = 0;
for ( MethodInfo methodInfo : methodInfos ) {
this.fieldCompletionTexts[ i ] = methodInfo.getName();
this.fieldCompletionValues[ i ] = methodInfo.getNameWithParameters();
i++;
}
this.variableClass = factType;
}
private void getMethodInfosForGlobalVariable() {
oracle.getMethodInfosForGlobalVariable( model.getVariable(),
new Callback<List<MethodInfo>>() {
@Override
public void callback( final List<MethodInfo> methodInfos ) {
if ( methodInfos != null ) {
checkIfFactTypeKnown( methodInfos );
setMethodInfos( methodInfos, oracle.getGlobalVariable( model.getVariable() ) );
checkIfReadOnly( null );
} else {
ActionCallMethodWidget.this.fieldCompletionTexts = new String[ 0 ];
ActionCallMethodWidget.this.fieldCompletionValues = new String[ 0 ];
checkIfReadOnly( true );
}
}
} );
}
private void doLayout() {
layout.clear();
layout.setWidget( 0,
0,
getSetterLabel() );
DirtyableFlexTable inner = new DirtyableFlexTable();
for ( int i = 0; i < model.getFieldValues().length; i++ ) {
ActionFieldFunction val = model.getFieldValue( i );
inner.setWidget( i,
0,
typeLabel( val.getType() ) );
inner.setWidget( i,
1,
valueEditor( val ) );
}
layout.setWidget( 0,
1,
inner );
}
private Widget getSetterLabel() {
HorizontalPanel horiz = new HorizontalPanel();
if ( model.getState() == ActionCallMethod.TYPE_UNDEFINED ) {
Image edit = GuidedRuleEditorImages508.INSTANCE.AddFieldToFact();
edit.setAltText( GuidedRuleEditorResources.CONSTANTS.AddAnotherFieldToThisSoYouCanSetItsValue() );
edit.setTitle( GuidedRuleEditorResources.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.getVariable() + "]" ) ); // NON-NLS
if ( !this.readOnly ) {
horiz.add( edit );
}
} else {
horiz.add( new SmallLabel( HumanReadable.getActionDisplayName( "call" ) + " [" + model.getVariable() + "." + model.getMethodName() + "]" ) ); // NON-NLS
}
return horiz;
}
protected void showAddFieldPopup( Widget w ) {
final AsyncPackageDataModelOracle oracle = this.getModeller().getDataModelOracle();
final FormStylePopup popup = new FormStylePopup( GuidedRuleEditorImages508.INSTANCE.Wizard(),
GuidedRuleEditorResources.CONSTANTS.ChooseAMethodToInvoke() );
final ListBox box = new ListBox();
box.addItem( "..." );
for ( int i = 0; i < fieldCompletionTexts.length; i++ ) {
box.addItem( fieldCompletionValues[ i ],
fieldCompletionTexts[ i ] );
}
box.setSelectedIndex( 0 );
popup.addAttribute( GuidedRuleEditorResources.CONSTANTS.ChooseAMethodToInvoke(),
box );
box.addChangeHandler( new ChangeHandler() {
public void onChange( ChangeEvent event ) {
final String methodNameWithParams = box.getItemText( box.getSelectedIndex() );
oracle.getMethodParams( variableClass,
methodNameWithParams,
new Callback<List<String>>() {
@Override
public void callback( final List<String> methodParameters ) {
final String methodName = box.getValue( box.getSelectedIndex() );
model.setMethodName( methodName );
model.setState( ActionCallMethod.TYPE_DEFINED );
for ( String methodParameter : methodParameters ) {
model.addFieldValue(
new ActionFieldFunction( methodName,
null,
methodParameter ) );
}
getModeller().refreshWidget();
popup.hide();
}
} );
}
} );
popup.show();
}
private Widget valueEditor( final ActionFieldFunction val ) {
return new MethodParameterValueEditor(
oracle,
val,
getEnums( val.getField() ),
this.getModeller(),
new Command() {
public void execute() {
setModified( true );
}
} );
}
private String getVariableType() {
String type;
if ( oracle.isGlobalVariable( this.model.getVariable() ) ) {
type = oracle.getGlobalVariable( this.model.getVariable() );
} else {
type = this.getModeller().getModel().getLHSBindingType( this.model.getVariable() );
if ( type == null ) {
type = this.getModeller().getModel().getRHSBoundFact( this.model.getVariable() ).getFactType();
}
}
return type;
}
private DropDownData getEnums( String field ) {
return oracle.getEnums( getVariableType(),
field,
FieldNatureUtil.toMap( this.model.getFieldValues() ) );
}
private Widget typeLabel( String type ) {
return new SmallLabel( 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;
}
@Override
public boolean isFactTypeKnown() {
return this.isFactTypeKnown;
}
}