Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.apache.openaz.xacml.admin.view.components; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.openaz.xacml.admin.jpa.Attribute; import org.apache.openaz.xacml.admin.jpa.ConstraintValue; import org.apache.openaz.xacml.api.Identifier; import org.apache.openaz.xacml.api.XACML3; import com.vaadin.annotations.AutoGenerated; import com.vaadin.data.Container; import com.vaadin.data.Item; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.data.Validator; import com.vaadin.data.util.BeanItemContainer; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Button.ClickListener; import com.vaadin.ui.Component; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.Field; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Table; import com.vaadin.ui.TableFieldFactory; import com.vaadin.ui.TextField; import com.vaadin.ui.VerticalLayout; public class EnumerationEditorComponent extends CustomComponent implements Validator { /*- VaadinEditorProperties={"grid":"RegularGrid,20","showGrid":true,"snapToGrid":true,"snapToObject":true,"movingGuides":false,"snappingDistance":10} */ @AutoGenerated private VerticalLayout mainLayout; @AutoGenerated private HorizontalLayout horizontalLayout_1; @AutoGenerated private Button buttonClearAll; @AutoGenerated private Button buttonRemove; @AutoGenerated private Button buttonAdd; @AutoGenerated private Table tableEnumerations; private static final long serialVersionUID = -1L; private static final Log logger = LogFactory.getLog(EnumerationEditorComponent.class); private final EnumerationEditorComponent self = this; private final Attribute attribute; private Identifier datatype; private final BeanItemContainer<ConstraintValue> beanContainer; public EnumerationEditorComponent(Attribute attribute, Identifier datatype) { buildMainLayout(); setCompositionRoot(mainLayout); // // Save our attribute // this.attribute = attribute; this.datatype = datatype; // // Construct a bean container that the // table uses to manage the values. // this.beanContainer = new BeanItemContainer<ConstraintValue>(ConstraintValue.class); // // Initialize our components // this.initializeTable(); this.initializeButtons(); } private void initializeTable() { // // Add the current enumeration values into the // bean container. // for (ConstraintValue value : this.attribute.getConstraintValues()) { if (value.getProperty().equals("Enumeration")) { this.beanContainer.addBean(value); } } // // Now hook the bean container to the table // this.tableEnumerations.setContainerDataSource(beanContainer); // // We have to manually create the text field because we need // to set a validator. // this.tableEnumerations.setTableFieldFactory(new TableFieldFactory() { private static final long serialVersionUID = 1L; @Override public Field<?> createField(Container container, Object itemId, Object propertyId, Component uiContext) { if (propertyId.toString().equals("value")) { final TextField text = new TextField(); text.setImmediate(true); text.setNullRepresentation(""); text.setNullSettingAllowed(false); text.setRequired(true); text.setRequiredError("Cannot have empty enumeration values."); text.addValidator(self); return text; } return null; } }); // // Finish setting up the table. // this.tableEnumerations.setVisibleColumns(new Object[] { "value" }); this.tableEnumerations.setColumnHeaders(new String[] { "Enumeration Value" }); this.tableEnumerations.setSelectable(true); this.tableEnumerations.setEditable(true); this.tableEnumerations.setImmediate(true); if (this.tableEnumerations.size() == 0) { this.tableEnumerations.setPageLength(3); } else { this.tableEnumerations.setPageLength(this.tableEnumerations.size() + 1); } // // As the user select items, enable/disable buttons // this.tableEnumerations.addValueChangeListener(new ValueChangeListener() { private static final long serialVersionUID = 1L; @Override public void valueChange(ValueChangeEvent event) { self.buttonRemove.setEnabled(self.tableEnumerations.getValue() != null); } }); } private void initializeButtons() { // // Adding new values // this.buttonAdd.setImmediate(true); this.buttonAdd.addClickListener(new ClickListener() { private static final long serialVersionUID = 1L; @Override public void buttonClick(ClickEvent event) { // // Create a new value object // ConstraintValue newValue = new ConstraintValue("Enumeration", ""); // // Associate it with the attribute // newValue.setAttribute(self.attribute); // // Add it into the attribute's internal list // self.attribute.addConstraintValue(newValue); // // Now we can add it to the GUI // Item item = self.tableEnumerations.addItem(newValue); if (item != null) { self.tableEnumerations.select(newValue); self.tableEnumerations.focus(); } // // Make sure this button is now enabled // self.buttonClearAll.setEnabled(true); } }); // // Removing values - nothing is selected to begin with so // disable the button. // this.buttonRemove.setEnabled(false); this.buttonRemove.setImmediate(true); this.buttonRemove.addClickListener(new ClickListener() { private static final long serialVersionUID = 1L; @Override public void buttonClick(ClickEvent event) { // // Get the selected value // Object value = self.tableEnumerations.getValue(); // // Was it selected or unselected (i.e. null)? If so, remove it // from the table // if (value != null && self.tableEnumerations.removeItem(value)) { // // Dis-associate it with the attribute // ((ConstraintValue) value).setAttribute(null); // // Now remove it from the attribute's internal list // self.attribute.removeConstraintValue((ConstraintValue) value); // // If there are no items, then disable this button // if (self.tableEnumerations.size() == 0) { self.buttonClearAll.setEnabled(false); } } } }); // // Clearing all the values, set it enabled if we have anything // this.buttonClearAll.setImmediate(true); this.buttonClearAll.setEnabled(this.tableEnumerations.size() > 0); this.buttonClearAll.addClickListener(new ClickListener() { private static final long serialVersionUID = 1L; @Override public void buttonClick(ClickEvent event) { // // Iterate all the values // for (Object id : self.tableEnumerations.getItemIds()) { // // Get the value object (it is the id) // ConstraintValue value = (ConstraintValue) id; // // Dis-associate it with the attribute // value.setAttribute(null); // // Now remove it from the attribute's internal list // self.attribute.removeConstraintValue(value); } // // Remove everything from the table // self.tableEnumerations.removeAllItems(); // // Now disable this button // self.buttonClearAll.setEnabled(false); } }); } public void setupDatatype(Identifier id) { if (logger.isTraceEnabled()) { logger.trace("setupDatatype: " + datatype); } this.datatype = id; // // Initiate a validate // this.tableEnumerations.validate(); } @Override public void validate(Object value) throws InvalidValueException { if (value == null || value.toString().length() == 0) { return; } if (datatype.equals(XACML3.ID_DATATYPE_INTEGER)) { try { Integer.parseInt(value.toString()); } catch (NumberFormatException e) { throw new InvalidValueException(e.getLocalizedMessage()); } return; } if (datatype.equals(XACML3.ID_DATATYPE_DOUBLE)) { try { Double.parseDouble(value.toString()); } catch (NumberFormatException e) { throw new InvalidValueException(e.getLocalizedMessage()); } return; } } @AutoGenerated private VerticalLayout buildMainLayout() { // common part: create layout mainLayout = new VerticalLayout(); mainLayout.setImmediate(false); mainLayout.setWidth("-1px"); mainLayout.setHeight("-1px"); mainLayout.setMargin(true); mainLayout.setSpacing(true); // top-level component properties setWidth("-1px"); setHeight("-1px"); // tableEnumerations tableEnumerations = new Table(); tableEnumerations.setCaption("Enumeration Values"); tableEnumerations.setImmediate(true); tableEnumerations.setDescription("Enter possible values for the attribute."); tableEnumerations.setWidth("100.0%"); tableEnumerations.setHeight("-1px"); tableEnumerations.setInvalidAllowed(false); mainLayout.addComponent(tableEnumerations); mainLayout.setExpandRatio(tableEnumerations, 1.0f); // horizontalLayout_1 horizontalLayout_1 = buildHorizontalLayout_1(); mainLayout.addComponent(horizontalLayout_1); mainLayout.setExpandRatio(horizontalLayout_1, 1.0f); return mainLayout; } @AutoGenerated private HorizontalLayout buildHorizontalLayout_1() { // common part: create layout horizontalLayout_1 = new HorizontalLayout(); horizontalLayout_1.setImmediate(false); horizontalLayout_1.setWidth("-1px"); horizontalLayout_1.setHeight("-1px"); horizontalLayout_1.setMargin(false); horizontalLayout_1.setSpacing(true); // buttonAdd buttonAdd = new Button(); buttonAdd.setCaption("Add"); buttonAdd.setImmediate(true); buttonAdd.setDescription("Add a new enumeration value."); buttonAdd.setWidth("-1px"); buttonAdd.setHeight("-1px"); horizontalLayout_1.addComponent(buttonAdd); horizontalLayout_1.setComponentAlignment(buttonAdd, new Alignment(9)); // buttonRemove buttonRemove = new Button(); buttonRemove.setCaption("Remove"); buttonRemove.setImmediate(true); buttonRemove.setDescription("Remove the selected enumeration value."); buttonRemove.setWidth("-1px"); buttonRemove.setHeight("-1px"); horizontalLayout_1.addComponent(buttonRemove); horizontalLayout_1.setComponentAlignment(buttonRemove, new Alignment(10)); // buttonClearAll buttonClearAll = new Button(); buttonClearAll.setCaption("Clear All"); buttonClearAll.setImmediate(false); buttonClearAll.setDescription("Clears all the values out."); buttonClearAll.setWidth("-1px"); buttonClearAll.setHeight("-1px"); horizontalLayout_1.addComponent(buttonClearAll); return horizontalLayout_1; } }