| /******************************************************************************* |
| * 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.ofbiz.minilang.method.envops; |
| |
| import java.util.List; |
| |
| import org.apache.ofbiz.base.util.UtilValidate; |
| import org.apache.ofbiz.base.util.collections.FlexibleMapAccessor; |
| import org.apache.ofbiz.minilang.MiniLangException; |
| import org.apache.ofbiz.minilang.MiniLangValidate; |
| import org.apache.ofbiz.minilang.SimpleMethod; |
| import org.apache.ofbiz.minilang.method.MethodContext; |
| import org.apache.ofbiz.minilang.method.MethodOperation; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Implements the <first-from-list> element. |
| * |
| * @see <a href="https://cwiki.apache.org/confluence/display/OFBADMIN/Mini+Language+-+minilang+-+simple-method+-+Reference">Mini-language Referenc</a> |
| */ |
| public final class FirstFromList extends MethodOperation { |
| |
| private final FlexibleMapAccessor<Object> entryFma; |
| private final FlexibleMapAccessor<List<Object>> listFma; |
| |
| public FirstFromList(Element element, SimpleMethod simpleMethod) throws MiniLangException { |
| super(element, simpleMethod); |
| if (MiniLangValidate.validationOn()) { |
| MiniLangValidate.handleError("<first-from-list> element is deprecated (use <set>)", simpleMethod, element); |
| MiniLangValidate.attributeNames(simpleMethod, element, "entry", "list"); |
| MiniLangValidate.requiredAttributes(simpleMethod, element, "entry", "list"); |
| MiniLangValidate.expressionAttributes(simpleMethod, element, "entry", "list"); |
| MiniLangValidate.noChildElements(simpleMethod, element); |
| } |
| entryFma = FlexibleMapAccessor.getInstance(element.getAttribute("entry")); |
| listFma = FlexibleMapAccessor.getInstance(element.getAttribute("list")); |
| } |
| |
| @Override |
| public boolean exec(MethodContext methodContext) throws MiniLangException { |
| List<? extends Object> theList = listFma.get(methodContext.getEnvMap()); |
| if (UtilValidate.isEmpty(theList)) { |
| entryFma.put(methodContext.getEnvMap(), null); |
| } else { |
| entryFma.put(methodContext.getEnvMap(), theList.get(0)); |
| } |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder("<first-from-list "); |
| sb.append("entry=\"").append(this.entryFma).append("\" "); |
| sb.append("list=\"").append(this.listFma).append("\" />"); |
| return sb.toString(); |
| } |
| |
| /** |
| * A factory for the <first-from-list> element. |
| */ |
| public static final class FirstFromListFactory implements Factory<FirstFromList> { |
| @Override |
| public FirstFromList createMethodOperation(Element element, SimpleMethod simpleMethod) throws MiniLangException { |
| return new FirstFromList(element, simpleMethod); |
| } |
| |
| @Override |
| public String getName() { |
| return "first-from-list"; |
| } |
| } |
| } |