/*
* 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.drools.wizards.assets.decisiontable;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.drools.guvnor.client.asseteditor.drools.modeldriven.ui.CEPOperatorsDropdown;
import org.drools.guvnor.client.asseteditor.drools.modeldriven.ui.OperatorSelection;
import org.drools.guvnor.client.decisiontable.DTCellValueWidgetFactory;
import org.drools.guvnor.client.decisiontable.Validator;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.resources.DroolsGuvnorImages;
import org.drools.guvnor.client.resources.WizardCellListResources;
import org.drools.guvnor.client.resources.WizardResources;
import org.drools.guvnor.client.widgets.drools.wizards.assets.decisiontable.cells.AvailableFieldCell;
import org.drools.guvnor.client.widgets.drools.wizards.assets.decisiontable.cells.ConditionCell;
import org.drools.guvnor.client.widgets.drools.wizards.assets.decisiontable.cells.ConditionPatternCell;
import org.drools.ide.common.client.modeldriven.brl.BaseSingleFieldConstraint;
import org.drools.ide.common.client.modeldriven.dt52.ConditionCol52;
import org.drools.ide.common.client.modeldriven.dt52.GuidedDecisionTable52.TableFormat;
import org.drools.ide.common.client.modeldriven.dt52.LimitedEntryConditionCol52;
import org.drools.ide.common.client.modeldriven.dt52.Pattern52;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PushButton;
import com.google.gwt.user.client.ui.RadioButton;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.MultiSelectionModel;
import com.google.gwt.view.client.SelectionChangeEvent;
import com.google.gwt.view.client.SingleSelectionModel;
/**
* An implementation of the Fact Patterns Constraints page
*/
public class FactPatternConstraintsPageViewImpl extends Composite
implements
FactPatternConstraintsPageView {
private Presenter presenter;
private Validator validator;
private List<Pattern52> availablePatterns;
private Pattern52 availablePatternsSelection;
private MinimumWidthCellList<Pattern52> availablePatternsWidget;
private Set<AvailableField> availableFieldsSelections;
private MinimumWidthCellList<AvailableField> availableFieldsWidget;
private List<ConditionCol52> chosenConditions;
private ConditionCol52 chosenConditionsSelection;
private Set<ConditionCol52> chosenConditionsSelections;
private MinimumWidthCellList<ConditionCol52> chosenConditionsWidget;
private boolean isOperatorValid;
private DTCellValueWidgetFactory factory;
@UiField
protected ScrollPanel availablePatternsContainer;
@UiField
protected ScrollPanel availableFieldsContainer;
@UiField
protected ScrollPanel chosenConditionsContainer;
@UiField
protected PushButton btnAdd;
@UiField
protected PushButton btnRemove;
@UiField
VerticalPanel conditionDefinition;
@UiField
HorizontalPanel calculationType;
@UiField
RadioButton optLiteral;
@UiField
RadioButton optFormula;
@UiField
RadioButton optPredicate;
@UiField
TextBox txtColumnHeader;
@UiField
HorizontalPanel columnHeaderContainer;
@UiField
TextBox txtPredicateExpression;
@UiField
HorizontalPanel predicateExpressionContainer;
@UiField
HorizontalPanel operatorContainer;
@UiField
SimplePanel ddOperatorContainer;
@UiField
TextBox txtValueList;
@UiField
HorizontalPanel msgDuplicateBindings;
@UiField
HorizontalPanel msgIncompleteConditions;
@UiField
VerticalPanel criteriaExtendedEntry;
@UiField
VerticalPanel criteriaLimitedEntry;
@UiField
HorizontalPanel limitedEntryValueContainer;
@UiField
SimplePanel limitedEntryValueWidgetContainer;
@UiField
HorizontalPanel defaultValueContainer;
@UiField
SimplePanel defaultValueWidgetContainer;
@UiField(provided = true)
PushButton btnMoveUp = new PushButton( AbstractImagePrototype.create( DroolsGuvnorImages.INSTANCE.shuffleUp() ).createImage() );
@UiField(provided = true)
PushButton btnMoveDown = new PushButton( AbstractImagePrototype.create( DroolsGuvnorImages.INSTANCE.shuffleDown() ).createImage() );
interface FactPatternConstraintsPageWidgetBinder
extends
UiBinder<Widget, FactPatternConstraintsPageViewImpl> {
}
private static FactPatternConstraintsPageWidgetBinder uiBinder = GWT.create( FactPatternConstraintsPageWidgetBinder.class );
public FactPatternConstraintsPageViewImpl(Validator validator) {
this.validator = validator;
this.availablePatternsWidget = new MinimumWidthCellList<Pattern52>( new ConditionPatternCell( validator ),
WizardCellListResources.INSTANCE );
this.availableFieldsWidget = new MinimumWidthCellList<AvailableField>( new AvailableFieldCell(),
WizardCellListResources.INSTANCE );
this.chosenConditionsWidget = new MinimumWidthCellList<ConditionCol52>( new ConditionCell( validator ),
WizardCellListResources.INSTANCE );
initWidget( uiBinder.createAndBindUi( this ) );
initialiseAvailablePatterns();
initialiseAvailableFields();
initialiseChosenFields();
initialiseCalculationTypes();
initialiseColumnHeader();
initialisePredicateExpression();
initialiseValueList();
initialiseShufflers();
}
private void initialiseAvailablePatterns() {
availablePatternsContainer.add( availablePatternsWidget );
availablePatternsWidget.setKeyboardSelectionPolicy( KeyboardSelectionPolicy.ENABLED );
availablePatternsWidget.setMinimumWidth( 175 );
Label lstEmpty = new Label( Constants.INSTANCE.DecisionTableWizardNoAvailablePatterns() );
lstEmpty.setStyleName( WizardCellListResources.INSTANCE.cellListStyle().cellListEmptyItem() );
availablePatternsWidget.setEmptyListWidget( lstEmpty );
final SingleSelectionModel<Pattern52> selectionModel = new SingleSelectionModel<Pattern52>();
availablePatternsWidget.setSelectionModel( selectionModel );
selectionModel.addSelectionChangeHandler( new SelectionChangeEvent.Handler() {
public void onSelectionChange(SelectionChangeEvent event) {
availablePatternsSelection = selectionModel.getSelectedObject();
presenter.selectPattern( availablePatternsSelection );
}
} );
}
private void initialiseAvailableFields() {
availableFieldsContainer.add( availableFieldsWidget );
availableFieldsWidget.setKeyboardSelectionPolicy( KeyboardSelectionPolicy.ENABLED );
availableFieldsWidget.setMinimumWidth( 175 );
Label lstEmpty = new Label( Constants.INSTANCE.DecisionTableWizardNoAvailableFields() );
lstEmpty.setStyleName( WizardCellListResources.INSTANCE.cellListStyle().cellListEmptyItem() );
availableFieldsWidget.setEmptyListWidget( lstEmpty );
final MultiSelectionModel<AvailableField> selectionModel = new MultiSelectionModel<AvailableField>();
availableFieldsWidget.setSelectionModel( selectionModel );
selectionModel.addSelectionChangeHandler( new SelectionChangeEvent.Handler() {
public void onSelectionChange(SelectionChangeEvent event) {
availableFieldsSelections = selectionModel.getSelectedSet();
btnAdd.setEnabled( availableFieldsSelections.size() > 0 );
}
} );
}
private void initialiseChosenFields() {
chosenConditionsContainer.add( chosenConditionsWidget );
chosenConditionsWidget.setKeyboardSelectionPolicy( KeyboardSelectionPolicy.ENABLED );
chosenConditionsWidget.setMinimumWidth( 175 );
Label lstEmpty = new Label( Constants.INSTANCE.DecisionTableWizardNoChosenFields() );
lstEmpty.setStyleName( WizardCellListResources.INSTANCE.cellListStyle().cellListEmptyItem() );
chosenConditionsWidget.setEmptyListWidget( lstEmpty );
final MultiSelectionModel<ConditionCol52> selectionModel = new MultiSelectionModel<ConditionCol52>();
chosenConditionsWidget.setSelectionModel( selectionModel );
selectionModel.addSelectionChangeHandler( new SelectionChangeEvent.Handler() {
public void onSelectionChange(SelectionChangeEvent event) {
chosenConditionsSelections = new HashSet<ConditionCol52>();
Set<ConditionCol52> selections = selectionModel.getSelectedSet();
for ( ConditionCol52 c : selections ) {
chosenConditionsSelections.add( c );
}
chosenConditionsSelected( chosenConditionsSelections );
}
private void chosenConditionsSelected(Set<ConditionCol52> cws) {
btnRemove.setEnabled( true );
if ( cws.size() == 1 ) {
chosenConditionsSelection = cws.iterator().next();
conditionDefinition.setVisible( true );
validateConditionHeader();
validateConditionOperator();
populateConditionDefinition();
enableMoveUpButton();
enableMoveDownButton();
} else {
chosenConditionsSelection = null;
conditionDefinition.setVisible( false );
optLiteral.setEnabled( false );
optFormula.setEnabled( false );
optPredicate.setEnabled( false );
txtColumnHeader.setEnabled( false );
txtValueList.setEnabled( false );
defaultValueContainer.setVisible( false );
btnMoveUp.setEnabled( false );
btnMoveDown.setEnabled( false );
}
}
private void displayCalculationTypes(Pattern52 selectedPattern,
ConditionCol52 selectedCondition) {
boolean isPredicate = (selectedCondition.getConstraintValueType() == BaseSingleFieldConstraint.TYPE_PREDICATE);
boolean hasEnum = presenter.hasEnum( selectedPattern,
selectedCondition );
calculationType.setVisible( !isPredicate );
optLiteral.setEnabled( !isPredicate );
optLiteral.setVisible( !isPredicate );
optFormula.setEnabled( !(isPredicate || hasEnum) );
optFormula.setVisible( !isPredicate );
operatorContainer.setVisible( !isPredicate );
optPredicate.setEnabled( isPredicate );
optPredicate.setVisible( isPredicate );
txtPredicateExpression.setEnabled( isPredicate );
predicateExpressionContainer.setVisible( isPredicate );
}
private void populateConditionDefinition() {
// Fields common to all table formats
txtColumnHeader.setEnabled( true );
txtColumnHeader.setText( chosenConditionsSelection.getHeader() );
String[] ops = presenter.getOperatorCompletions( availablePatternsSelection,
chosenConditionsSelection );
CEPOperatorsDropdown ddOperator = new CEPOperatorsDropdown( ops,
chosenConditionsSelection );
ddOperatorContainer.setWidget( ddOperator );
criteriaExtendedEntry.setVisible( presenter.getTableFormat() == TableFormat.EXTENDED_ENTRY );
criteriaLimitedEntry.setVisible( presenter.getTableFormat() == TableFormat.LIMITED_ENTRY );
// Fields specific to the table format
switch ( presenter.getTableFormat() ) {
case EXTENDED_ENTRY :
txtValueList.setEnabled( !presenter.requiresValueList( availablePatternsSelection,
chosenConditionsSelection ) );
txtValueList.setText( chosenConditionsSelection.getValueList() );
makeDefaultValueWidget();
defaultValueContainer.setVisible( validator.doesOperatorNeedValue( chosenConditionsSelection ) );
if ( chosenConditionsSelection.getConstraintValueType() == BaseSingleFieldConstraint.TYPE_PREDICATE ) {
txtPredicateExpression.setText( chosenConditionsSelection.getFactField() );
}
ddOperator.addValueChangeHandler( new ValueChangeHandler<OperatorSelection>() {
public void onValueChange(ValueChangeEvent<OperatorSelection> event) {
chosenConditionsSelection.setOperator( event.getValue().getValue() );
final boolean requiresValueList = presenter.requiresValueList( availablePatternsSelection,
chosenConditionsSelection );
txtValueList.setEnabled( requiresValueList );
if ( !requiresValueList ) {
txtValueList.setText( "" );
}
presenter.stateChanged();
validateConditionOperator();
makeDefaultValueWidget();
defaultValueContainer.setVisible( validator.doesOperatorNeedValue( chosenConditionsSelection ) );
}
} );
switch ( chosenConditionsSelection.getConstraintValueType() ) {
case BaseSingleFieldConstraint.TYPE_LITERAL :
optLiteral.setValue( true );
displayCalculationTypes( availablePatternsSelection,
chosenConditionsSelection );
break;
case BaseSingleFieldConstraint.TYPE_RET_VALUE :
optFormula.setValue( true );
displayCalculationTypes( availablePatternsSelection,
chosenConditionsSelection );
break;
case BaseSingleFieldConstraint.TYPE_PREDICATE :
optPredicate.setValue( true );
displayCalculationTypes( availablePatternsSelection,
chosenConditionsSelection );
}
break;
case LIMITED_ENTRY :
calculationType.setVisible( false );
makeLimitedValueWidget();
// If operator changes the widget used to populate the
// value can change
ddOperator.addValueChangeHandler( new ValueChangeHandler<OperatorSelection>() {
public void onValueChange(ValueChangeEvent<OperatorSelection> event) {
chosenConditionsSelection.setOperator( event.getValue().getValue() );
validateConditionOperator();
makeLimitedValueWidget();
presenter.stateChanged();
}
} );
break;
}
}
private void makeLimitedValueWidget() {
if ( !(chosenConditionsSelection instanceof LimitedEntryConditionCol52) ) {
return;
}
LimitedEntryConditionCol52 lec = (LimitedEntryConditionCol52) chosenConditionsSelection;
boolean doesOperatorNeedValue = validator.doesOperatorNeedValue( chosenConditionsSelection );
if ( !doesOperatorNeedValue ) {
limitedEntryValueContainer.setVisible( false );
lec.setValue( null );
return;
}
limitedEntryValueContainer.setVisible( true );
if ( lec.getValue() == null ) {
lec.setValue( factory.makeNewValue( chosenConditionsSelection ) );
}
limitedEntryValueWidgetContainer.setWidget( factory.getWidget( availablePatternsSelection,
chosenConditionsSelection,
lec.getValue() ) );
}
} );
}
private void makeDefaultValueWidget() {
if ( chosenConditionsSelection.getDefaultValue() == null ) {
chosenConditionsSelection.setDefaultValue( factory.makeNewValue( chosenConditionsSelection ) );
}
defaultValueWidgetContainer.setWidget( factory.getWidget( availablePatternsSelection,
chosenConditionsSelection,
chosenConditionsSelection.getDefaultValue() ) );
}
private void validateConditionHeader() {
if ( validator.isConditionHeaderValid( chosenConditionsSelection ) ) {
columnHeaderContainer.setStyleName( WizardResources.INSTANCE.style().wizardDTableFieldContainerValid() );
} else {
columnHeaderContainer.setStyleName( WizardResources.INSTANCE.style().wizardDTableFieldContainerInvalid() );
}
}
private void validateConditionOperator() {
isOperatorValid = validator.isConditionOperatorValid( chosenConditionsSelection );
if ( isOperatorValid ) {
operatorContainer.setStyleName( WizardResources.INSTANCE.style().wizardDTableFieldContainerValid() );
} else {
operatorContainer.setStyleName( WizardResources.INSTANCE.style().wizardDTableFieldContainerInvalid() );
}
}
private void initialiseCalculationTypes() {
optLiteral.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent w) {
chosenConditionsSelection.setConstraintValueType( BaseSingleFieldConstraint.TYPE_LITERAL );
chosenConditionsWidget.redraw();
presenter.assertDefaultValue( availablePatternsSelection,
chosenConditionsSelection );
makeDefaultValueWidget();
}
} );
optFormula.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent w) {
chosenConditionsSelection.setConstraintValueType( BaseSingleFieldConstraint.TYPE_RET_VALUE );
chosenConditionsWidget.redraw();
presenter.assertDefaultValue( availablePatternsSelection,
chosenConditionsSelection );
makeDefaultValueWidget();
}
} );
optPredicate.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent w) {
chosenConditionsSelection.setConstraintValueType( BaseSingleFieldConstraint.TYPE_PREDICATE );
chosenConditionsWidget.redraw();
presenter.assertDefaultValue( availablePatternsSelection,
chosenConditionsSelection );
makeDefaultValueWidget();
}
} );
}
private void initialiseColumnHeader() {
txtColumnHeader.addValueChangeHandler( new ValueChangeHandler<String>() {
public void onValueChange(ValueChangeEvent<String> event) {
String header = txtColumnHeader.getText();
chosenConditionsSelection.setHeader( header );
presenter.stateChanged();
validateConditionHeader();
}
} );
}
private void initialisePredicateExpression() {
txtPredicateExpression.addValueChangeHandler( new ValueChangeHandler<String>() {
public void onValueChange(ValueChangeEvent<String> event) {
String expression = txtPredicateExpression.getText();
chosenConditionsSelection.setFactField( expression );
// Redraw list widget that shows Predicate expressions
chosenConditionsWidget.redraw();
}
} );
}
private void initialiseValueList() {
//Copy value back to model
txtValueList.addValueChangeHandler( new ValueChangeHandler<String>() {
public void onValueChange(ValueChangeEvent<String> event) {
String valueList = txtValueList.getText();
chosenConditionsSelection.setValueList( valueList );
// ValueList is optional, no need to advise of state change
}
} );
//Update Default Value widget if necessary
txtValueList.addBlurHandler( new BlurHandler() {
public void onBlur(BlurEvent event) {
presenter.assertDefaultValue( availablePatternsSelection,
chosenConditionsSelection );
makeDefaultValueWidget();
}
} );
}
private void initialiseShufflers() {
btnMoveUp.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
int index = chosenConditions.indexOf( chosenConditionsSelection );
ConditionCol52 c = chosenConditions.remove( index );
chosenConditions.add( index - 1,
c );
setChosenConditions( chosenConditions );
availablePatternsSelection.setChildColumns( chosenConditions );
}
} );
btnMoveDown.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
int index = chosenConditions.indexOf( chosenConditionsSelection );
ConditionCol52 c = chosenConditions.remove( index );
chosenConditions.add( index + 1,
c );
setChosenConditions( chosenConditions );
availablePatternsSelection.setChildColumns( chosenConditions );
}
} );
}
private void enableMoveUpButton() {
if ( chosenConditions == null || chosenConditionsSelection == null ) {
btnMoveUp.setEnabled( false );
return;
}
int index = chosenConditions.indexOf( chosenConditionsSelection );
btnMoveUp.setEnabled( index > 0 );
}
private void enableMoveDownButton() {
if ( chosenConditions == null || chosenConditionsSelection == null ) {
btnMoveDown.setEnabled( false );
return;
}
int index = chosenConditions.indexOf( chosenConditionsSelection );
btnMoveDown.setEnabled( index < chosenConditions.size() - 1 );
}
public void setPresenter(Presenter presenter) {
this.presenter = presenter;
}
public void setDTCellValueWidgetFactory(DTCellValueWidgetFactory factory) {
this.factory = factory;
}
public void setAreConditionsDefined(boolean areConditionsDefined) {
msgIncompleteConditions.setVisible( !areConditionsDefined );
chosenConditionsWidget.redraw();
availablePatternsWidget.redraw();
}
public void setArePatternBindingsUnique(boolean arePatternBindingsUnique) {
msgDuplicateBindings.setVisible( !arePatternBindingsUnique );
availablePatternsWidget.redraw();
}
public void setAvailablePatterns(List<Pattern52> patterns) {
availablePatterns = patterns;
availablePatternsWidget.setRowCount( availablePatterns.size(),
true );
availablePatternsWidget.setRowData( availablePatterns );
if ( availablePatternsSelection != null ) {
// If the currently selected pattern is no longer available clear selections
if ( !availablePatterns.contains( availablePatternsSelection ) ) {
availablePatternsWidget.getSelectionModel().setSelected( availablePatternsSelection,
false );
availablePatternsSelection = null;
setAvailableFields( new ArrayList<AvailableField>() );
availableFieldsSelections = null;
setChosenConditions( new ArrayList<ConditionCol52>() );
chosenConditionsSelection = null;
conditionDefinition.setVisible( false );
msgIncompleteConditions.setVisible( false );
}
} else {
// If no available pattern is selected clear fields
setAvailableFields( new ArrayList<AvailableField>() );
setChosenConditions( new ArrayList<ConditionCol52>() );
}
}
public void setAvailableFields(List<AvailableField> fields) {
availableFieldsWidget.setRowCount( fields.size(),
true );
availableFieldsWidget.setRowData( fields );
}
public void setChosenConditions(List<ConditionCol52> conditions) {
chosenConditions = conditions;
chosenConditionsWidget.setRowCount( conditions.size(),
true );
chosenConditionsWidget.setRowData( conditions );
conditionDefinition.setVisible( conditions.contains( chosenConditionsSelection ) );
enableMoveUpButton();
enableMoveDownButton();
presenter.stateChanged();
}
@UiHandler(value = "btnAdd")
public void btnAddClick(ClickEvent event) {
for ( AvailableField f : availableFieldsSelections ) {
chosenConditions.add( makeNewConditionColumn( f ) );
}
setChosenConditions( chosenConditions );
availablePatternsSelection.setChildColumns( chosenConditions );
presenter.stateChanged();
}
private ConditionCol52 makeNewConditionColumn(AvailableField f) {
TableFormat format = presenter.getTableFormat();
if ( format == TableFormat.EXTENDED_ENTRY ) {
ConditionCol52 c = new ConditionCol52();
c.setFactField( f.getName() );
c.setFieldType( f.getType() );
c.setConstraintValueType( f.getCalculationType() );
return c;
} else {
LimitedEntryConditionCol52 c = new LimitedEntryConditionCol52();
c.setFactField( f.getName() );
c.setFieldType( f.getType() );
c.setConstraintValueType( BaseSingleFieldConstraint.TYPE_LITERAL );
return c;
}
}
@UiHandler(value = "btnRemove")
public void btnRemoveClick(ClickEvent event) {
for ( ConditionCol52 c : chosenConditionsSelections ) {
chosenConditions.remove( c );
}
chosenConditionsSelections.clear();
setChosenConditions( chosenConditions );
availablePatternsSelection.setChildColumns( chosenConditions );
presenter.stateChanged();
txtColumnHeader.setText( "" );
txtValueList.setText( "" );
defaultValueContainer.setVisible( false );
conditionDefinition.setVisible( false );
btnRemove.setEnabled( false );
}
}