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 com.googlecode.jsfFlex.component.ext; import java.io.IOException; import java.util.Collection; import java.util.Map; import javax.el.ValueExpression; import javax.faces.component.FacesComponent; import javax.faces.context.FacesContext; import javax.faces.model.SelectItem; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFComponent; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import com.googlecode.jsfFlex.attributes.IFlexUIBaseAttributes; import com.googlecode.jsfFlex.attributes.IFlexUIDataProviderCollectionAttribute; import com.googlecode.jsfFlex.attributes.IFlexUITextAttribute; import com.googlecode.jsfFlex.shared.beans.additionalScriptContent.AdditionalApplicationScriptContent; import com.googlecode.jsfFlex.shared.beans.additionalScriptContent.AdditionalApplicationScriptContent.ACTION_SCRIPT_IMPORT; import com.googlecode.jsfFlex.shared.beans.additionalScriptContent.SimpleDataProviderSetter.DATA_PROVIDER_TYPE; import com.googlecode.jsfFlex.shared.context.AbstractFlexContext; import com.googlecode.jsfFlex.shared.exception.ComponentBuildException; import com.googlecode.jsfFlex.shared.util.FlexJsfUtil; /** * AbstractFlexUIComboBox is a special case where the preserving of the state of the "text" field<br> * is held within the code. Main reason is because it extends FlexUISelectedIndexBase and there exists<br> * no reason to create an another base class to preserve both "selectedIndex" + "text".<br> * @author Ji Hoon Kim */ @JSFComponent(name = "jf:flexComboBox", clazz = "com.googlecode.jsfFlex.component.ext.FlexUIComboBox", type = "com.googlecode.jsfFlex.FlexUIComboBox", tagClass = "com.googlecode.jsfFlex.taglib.component.ext.FlexUIComboBoxTag", family = "javax.faces.FlexInput", defaultRendererType = "com.googlecode.jsfFlex.FlexComboBox", tagSuperclass = "com.googlecode.jsfFlex.taglib.AbstractFlexUIInputTagBase") @FacesComponent("com.googlecode.jsfFlex.FlexUIComboBox") public abstract class AbstractFlexUIComboBox extends com.googlecode.jsfFlex.component.FlexUISelectedIndexBase implements IFlexUIBaseAttributes, IFlexUIDataProviderCollectionAttribute, IFlexUITextAttribute { private final static Log _log = LogFactory.getLog(AbstractFlexUIComboBox.class); private static final String DATA_PROPERTY = "data"; private static final String LABEL_PROPERTY = "label"; private static final String TEXT_ATTR = "text"; private static final String TEXT_ID_APPENDED = "_text"; private JSONObject initValue; { try { initValue = new JSONObject(); initValue.put(ATTRIBUTE, TEXT_ATTR); _initValues.put(initValue); } catch (JSONException jsonException) { _log.info("Error while formatting to JSON content", jsonException); } } @Override protected void populateComponentInitValues() { super.populateComponentInitValues(); try { if (getText() != null) { initValue.put(VALUE, FlexJsfUtil.escapeCharacters(getText())); } } catch (JSONException jsonException) { _log.info("Error while formatting to JSON content", jsonException); } } @Override public void encodeBegin(FacesContext context) throws IOException { super.encodeBegin(context); AbstractFlexContext flexContext = AbstractFlexContext.getCurrentInstance(); if (!flexContext.isProductionEnv()) { Collection<? extends Object> dataProviderCollection = getDataProviderCollection(); if (dataProviderCollection != null && dataProviderCollection.size() > 0) { //For AbstractFlexUIComboBox, entries within the collection must be of type SelectItem AdditionalApplicationScriptContent additionalApplicationScriptContent = flexContext .getAdditionalAppScriptContent(); additionalApplicationScriptContent .addActionScriptImport(ACTION_SCRIPT_IMPORT.COMBO_BOX_COMPONENT_AS); additionalApplicationScriptContent .addActionScriptImport(ACTION_SCRIPT_IMPORT.MX_COLLECTIONS_ILIST_AS); additionalApplicationScriptContent .addActionScriptImport(ACTION_SCRIPT_IMPORT.MX_COLLECTIONS_ARRAY_LIST_AS); JSONArray comboBoxContent = new JSONArray(); for (Object currInstace : dataProviderCollection) { SelectItem currSelectItem = SelectItem.class.cast(currInstace); JSONObject comboBoxEntry = new JSONObject(); try { comboBoxEntry.put(DATA_PROPERTY, currSelectItem.getValue().toString()); comboBoxEntry.put(LABEL_PROPERTY, currSelectItem.getLabel()); comboBoxContent.put(comboBoxEntry); } catch (JSONException jsonException) { _log.info("Error setting the following content for dataProviderCollection " + currSelectItem.getValue() + currSelectItem.getLabel(), jsonException); throw new ComponentBuildException(jsonException); } } additionalApplicationScriptContent.addSimpleDataProviderSetter(getId(), DATA_PROVIDER_TYPE.COMBO_BOX, comboBoxContent.toString()); } } } @Override public void decode(FacesContext context) { super.decode(context); Map<String, String> requestMap = context.getExternalContext().getRequestParameterMap(); String textId = getId() + TEXT_ID_APPENDED; String textUpdateVal = requestMap.get(textId); if (textUpdateVal != null) { setText(textUpdateVal); } } @Override public void processUpdates(FacesContext context) { super.processUpdates(context); if (!isRendered() || !isValid()) { return; } ValueExpression ve = getValueExpression(TEXT_ATTR); if (ve != null && !ve.isReadOnly(context.getELContext())) { ve.setValue(context.getELContext(), getText()); setText(null); } } }