Java tutorial
/* * 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.HashMap; import java.util.Map; 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.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.ListBox; import com.google.gwt.user.client.ui.Widget; import org.drools.workbench.models.datamodel.imports.Import; import org.drools.workbench.models.datamodel.rule.FactPattern; import org.drools.workbench.models.datamodel.rule.FreeFormLine; import org.drools.workbench.models.datamodel.rule.FromAccumulateCompositeFactPattern; import org.drools.workbench.models.datamodel.rule.FromCollectCompositeFactPattern; import org.drools.workbench.models.datamodel.rule.FromCompositeFactPattern; import org.drools.workbench.models.datamodel.rule.FromEntryPointFactPattern; import org.drools.workbench.models.datamodel.rule.IPattern; import org.drools.workbench.screens.guided.rule.client.editor.RuleModeller; import org.drools.workbench.screens.guided.rule.client.resources.GuidedRuleEditorResources; import org.kie.workbench.common.widgets.client.datamodel.AsyncPackageDataModelOracle; import org.kie.workbench.common.widgets.client.resources.HumanReadable; import org.kie.workbench.common.widgets.client.resources.i18n.HumanReadableConstants; import org.uberfire.ext.widgets.common.client.common.ClickableLabel; import com.google.gwt.user.client.ui.FlexTable; import org.uberfire.ext.widgets.common.client.common.popups.FormStylePopup; public class FromCollectCompositeFactPatternWidget extends FromCompositeFactPatternWidget { private Map<String, String> extraLeftSidePatternFactTypes = null; public FromCollectCompositeFactPatternWidget(RuleModeller modeller, EventBus eventBus, FromCollectCompositeFactPattern pattern) { super(modeller, eventBus, pattern); } public FromCollectCompositeFactPatternWidget(RuleModeller modeller, EventBus eventBus, FromCollectCompositeFactPattern pattern, Boolean readOnly) { super(modeller, eventBus, pattern, readOnly); } private void initExtraLeftSidePatternFactTypes() { extraLeftSidePatternFactTypes = new HashMap<String, String>(); if (modelImportsClass("java.util.Collection")) { extraLeftSidePatternFactTypes.put("Collection", "Collection"); } if (modelImportsClass("java.util.List")) { extraLeftSidePatternFactTypes.put("List", "List"); } if (modelImportsClass("java.util.Set")) { extraLeftSidePatternFactTypes.put("Set", "Set"); } } private boolean modelImportsClass(final String fullyQualifiedClassName) { for (Import i : modeller.getModel().getImports().getImports()) { if (i.getType().equals(fullyQualifiedClassName)) { return true; } } return false; } @Override protected Widget getCompositeLabel() { ClickHandler leftPatternclick = new ClickHandler() { public void onClick(ClickEvent event) { Widget w = (Widget) event.getSource(); showFactTypeSelector(w); } }; ClickHandler rightPatternclick = new ClickHandler() { public void onClick(ClickEvent event) { Widget w = (Widget) event.getSource(); showRightPatternSelector(w); } }; String lbl = "<div class='form-field'>" + HumanReadable.getCEDisplayName("from collect") + "</div>"; FlexTable panel = new FlexTable(); int r = 0; if (pattern.getFactPattern() == null) { panel.setWidget(r++, 0, new ClickableLabel("<br> <font color='red'>" + GuidedRuleEditorResources.CONSTANTS.clickToAddPatterns() + "</font>", leftPatternclick, !this.readOnly)); } panel.setWidget(r++, 0, new HTML(lbl)); if (this.getFromCollectPattern().getRightPattern() == null) { panel.setWidget(r++, 0, new ClickableLabel("<br> <font color='red'>" + GuidedRuleEditorResources.CONSTANTS.clickToAddPatterns() + "</font>", rightPatternclick, !this.readOnly)); } else { IPattern rPattern = this.getFromCollectPattern().getRightPattern(); RuleModellerWidget patternWidget = null; if (rPattern instanceof FactPattern) { patternWidget = new FactPatternWidget(this.getModeller(), this.getEventBus(), rPattern, true, true, this.readOnly); } else if (rPattern instanceof FromAccumulateCompositeFactPattern) { patternWidget = new FromAccumulateCompositeFactPatternWidget(this.getModeller(), this.getEventBus(), (FromAccumulateCompositeFactPattern) rPattern, this.readOnly); } else if (rPattern instanceof FromCollectCompositeFactPattern) { patternWidget = new FromCollectCompositeFactPatternWidget(this.getModeller(), this.getEventBus(), (FromCollectCompositeFactPattern) rPattern, this.readOnly); } else if (rPattern instanceof FromEntryPointFactPattern) { patternWidget = new FromEntryPointFactPatternWidget(this.getModeller(), this.getEventBus(), (FromEntryPointFactPattern) rPattern, this.readOnly); } else if (rPattern instanceof FromCompositeFactPattern) { patternWidget = new FromCompositeFactPatternWidget(this.getModeller(), this.getEventBus(), (FromCompositeFactPattern) rPattern, this.readOnly); } else if (rPattern instanceof FreeFormLine) { patternWidget = new FreeFormLineWidget(this.getModeller(), this.getEventBus(), (FreeFormLine) rPattern, this.readOnly); } else { throw new IllegalArgumentException( "Unsupported pattern " + rPattern + " for right side of FROM COLLECT"); } patternWidget.addOnModifiedCommand(new Command() { public void execute() { setModified(true); } }); panel.setWidget(r++, 0, addRemoveButton(patternWidget, new ClickHandler() { public void onClick(ClickEvent event) { if (Window.confirm(GuidedRuleEditorResources.CONSTANTS.RemoveThisBlockOfData())) { setModified(true); getFromCollectPattern().setRightPattern(null); getModeller().refreshWidget(); } } })); } return panel; } @Override protected void showFactTypeSelector(final Widget w) { final FormStylePopup popup = new FormStylePopup(GuidedRuleEditorResources.CONSTANTS.NewFactPattern()); popup.setTitle(GuidedRuleEditorResources.CONSTANTS.NewFactPattern()); final ListBox box = new ListBox(); box.addItem(GuidedRuleEditorResources.CONSTANTS.Choose()); for (Map.Entry<String, String> entry : this.getExtraLeftSidePatternFactTypes().entrySet()) { box.addItem(entry.getKey(), entry.getValue()); } //TODO: Add Facts that extends Collection // box.addItem("..."); // box.addItem("..."); box.setSelectedIndex(0); box.addChangeHandler(new ChangeHandler() { public void onChange(ChangeEvent event) { pattern.setFactPattern(new FactPattern(box.getValue(box.getSelectedIndex()))); setModified(true); getModeller().refreshWidget(); popup.hide(); } }); popup.addAttribute(GuidedRuleEditorResources.CONSTANTS.chooseFactType(), box); popup.show(); } /** * Pops up the fact selector. */ protected void showRightPatternSelector(final Widget w) { final ListBox box = new ListBox(); AsyncPackageDataModelOracle oracle = this.getModeller().getDataModelOracle(); String[] facts = oracle.getFactTypes(); box.addItem(GuidedRuleEditorResources.CONSTANTS.Choose()); for (int i = 0; i < facts.length; i++) { box.addItem(facts[i]); } box.setSelectedIndex(0); final FormStylePopup popup = new FormStylePopup(GuidedRuleEditorResources.CONSTANTS.NewFactPattern()); popup.addAttribute(GuidedRuleEditorResources.CONSTANTS.chooseFactType(), box); box.addChangeHandler(new ChangeHandler() { public void onChange(ChangeEvent event) { getFromCollectPattern().setRightPattern(new FactPattern(box.getItemText(box.getSelectedIndex()))); setModified(true); getModeller().refreshWidget(); popup.hide(); } }); final Button freeFormDRLBtn = new Button(GuidedRuleEditorResources.CONSTANTS.FreeFormDrl()); final Button fromBtn = new Button(HumanReadableConstants.INSTANCE.From()); final Button fromAccumulateBtn = new Button(HumanReadableConstants.INSTANCE.FromAccumulate()); final Button fromCollectBtn = new Button(HumanReadableConstants.INSTANCE.FromCollect()); final Button fromEntryPointBtn = new Button(HumanReadableConstants.INSTANCE.FromEntryPoint()); ClickHandler btnsClickHandler = new ClickHandler() { public void onClick(ClickEvent event) { Widget sender = (Widget) event.getSource(); if (sender == fromBtn) { getFromCollectPattern().setRightPattern(new FromCompositeFactPattern()); } else if (sender == fromAccumulateBtn) { getFromCollectPattern().setRightPattern(new FromAccumulateCompositeFactPattern()); } else if (sender == fromCollectBtn) { getFromCollectPattern().setRightPattern(new FromCollectCompositeFactPattern()); } else if (sender == freeFormDRLBtn) { getFromCollectPattern().setRightPattern(new FreeFormLine()); } else if (sender == fromEntryPointBtn) { getFromCollectPattern().setRightPattern(new FromEntryPointFactPattern()); } else { throw new IllegalArgumentException("Unknown sender: " + sender); } setModified(true); getModeller().refreshWidget(); popup.hide(); } }; freeFormDRLBtn.addClickHandler(btnsClickHandler); fromBtn.addClickHandler(btnsClickHandler); fromAccumulateBtn.addClickHandler(btnsClickHandler); fromCollectBtn.addClickHandler(btnsClickHandler); fromEntryPointBtn.addClickHandler(btnsClickHandler); popup.addAttribute("", freeFormDRLBtn); popup.addAttribute("", fromBtn); popup.addAttribute("", fromAccumulateBtn); popup.addAttribute("", fromCollectBtn); popup.addAttribute("", fromEntryPointBtn); popup.show(); } private FromCollectCompositeFactPattern getFromCollectPattern() { return (FromCollectCompositeFactPattern) this.pattern; } @Override protected void calculateReadOnly() { if (this.pattern.getFactPattern() != null) { String factType = this.pattern.getFactPattern().getFactType(); // We allow the use of Set, List or Collection, even when they are not added as imports // Because of this, we also need to add them as known fact types if (getExtraLeftSidePatternFactTypes().values().contains(factType)) { this.isFactTypeKnown = true; } else { this.isFactTypeKnown = this.getModeller().getDataModelOracle().isFactTypeRecognized(factType); } if (this.pattern.getFactPattern() != null) { this.readOnly = !(this.getExtraLeftSidePatternFactTypes() .containsValue(this.pattern.getFactPattern().getFactType()) || this.getModeller().getDataModelOracle() .isFactTypeRecognized(this.pattern.getFactPattern().getFactType())); } } } private Map<String, String> getExtraLeftSidePatternFactTypes() { if (this.extraLeftSidePatternFactTypes == null) { this.initExtraLeftSidePatternFactTypes(); } return this.extraLeftSidePatternFactTypes; } }