| /******************************************************************************* |
| * 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.ofbiz.minilang.method.envops; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.ofbiz.base.util.collections.FlexibleMapAccessor; |
| import org.ofbiz.base.util.string.FlexibleStringExpander; |
| import org.ofbiz.minilang.MiniLangException; |
| import org.ofbiz.minilang.MiniLangRuntimeException; |
| import org.ofbiz.minilang.MiniLangValidate; |
| import org.ofbiz.minilang.SimpleMethod; |
| import org.ofbiz.minilang.artifact.ArtifactInfoContext; |
| import org.ofbiz.minilang.method.MethodContext; |
| import org.ofbiz.minilang.method.MethodOperation; |
| import org.ofbiz.minilang.method.envops.Break.BreakElementException; |
| import org.ofbiz.minilang.method.envops.Continue.ContinueElementException; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Implements the <loop> element. |
| * |
| * @see <a href="https://cwiki.apache.org/OFBADMIN/mini-language-reference.html#Mini-languageReference-{{%3Cloop%3E}}">Mini-language Reference</a> |
| */ |
| public final class Loop extends MethodOperation { |
| |
| public static final String module = Loop.class.getName(); |
| |
| private final FlexibleStringExpander countFse; |
| private final FlexibleMapAccessor<Integer> fieldFma; |
| private final List<MethodOperation> subOps; |
| |
| public Loop(Element element, SimpleMethod simpleMethod) throws MiniLangException { |
| super(element, simpleMethod); |
| if (MiniLangValidate.validationOn()) { |
| MiniLangValidate.attributeNames(simpleMethod, element, "count", "field"); |
| MiniLangValidate.requiredAttributes(simpleMethod, element, "count"); |
| MiniLangValidate.expressionAttributes(simpleMethod, element, "count", "field"); |
| } |
| this.countFse = FlexibleStringExpander.getInstance(element.getAttribute("count")); |
| this.fieldFma = FlexibleMapAccessor.getInstance(element.getAttribute("field")); |
| this.subOps = Collections.unmodifiableList(SimpleMethod.readOperations(element, simpleMethod)); |
| } |
| |
| @Override |
| public boolean exec(MethodContext methodContext) throws MiniLangException { |
| String countStr = this.countFse.expandString(methodContext.getEnvMap()); |
| int count = 0; |
| try { |
| count = Double.valueOf(countStr).intValue(); |
| } catch (NumberFormatException e) { |
| throw new MiniLangRuntimeException("Error while converting \"" + countStr + "\" to a number: " + e.getMessage(), this); |
| } |
| if (count < 0) { |
| throw new MiniLangRuntimeException("Unable to execute loop operation because the count is negative: " + countStr, this); |
| } |
| for (int i = 0; i < count; i++) { |
| this.fieldFma.put(methodContext.getEnvMap(), i); |
| try { |
| for (MethodOperation methodOperation : subOps) { |
| if (!methodOperation.exec(methodContext)) { |
| return false; |
| } |
| } |
| } catch (MiniLangException e) { |
| if (e instanceof BreakElementException) { |
| break; |
| } |
| if (e instanceof ContinueElementException) { |
| continue; |
| } |
| throw e; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public void gatherArtifactInfo(ArtifactInfoContext aic) { |
| for (MethodOperation method : this.subOps) { |
| method.gatherArtifactInfo(aic); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder("<loop "); |
| if (!this.countFse.isEmpty()) { |
| sb.append("count=\"").append(this.countFse).append("\" "); |
| } |
| if (!this.fieldFma.isEmpty()) { |
| sb.append("field=\"").append(this.fieldFma).append("\" "); |
| } |
| sb.append("/>"); |
| return sb.toString(); |
| } |
| |
| /** |
| * A factory for the <loop> element. |
| */ |
| public static final class LoopFactory implements Factory<Loop> { |
| @Override |
| public Loop createMethodOperation(Element element, SimpleMethod simpleMethod) throws MiniLangException { |
| return new Loop(element, simpleMethod); |
| } |
| |
| @Override |
| public String getName() { |
| return "loop"; |
| } |
| } |
| } |