| /******************************************************************************* |
| * 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.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.ofbiz.base.util.Debug; |
| import org.apache.ofbiz.base.util.UtilGenerics; |
| import org.apache.ofbiz.base.util.collections.FlexibleMapAccessor; |
| import org.apache.ofbiz.entity.GenericEntityException; |
| import org.apache.ofbiz.entity.GenericValue; |
| import org.apache.ofbiz.entity.util.EntityListIterator; |
| import org.apache.ofbiz.minilang.MiniLangException; |
| import org.apache.ofbiz.minilang.MiniLangRuntimeException; |
| import org.apache.ofbiz.minilang.MiniLangValidate; |
| import org.apache.ofbiz.minilang.SimpleMethod; |
| import org.apache.ofbiz.minilang.artifact.ArtifactInfoContext; |
| import org.apache.ofbiz.minilang.method.MethodContext; |
| import org.apache.ofbiz.minilang.method.MethodOperation; |
| import org.apache.ofbiz.minilang.method.envops.Break.BreakElementException; |
| import org.apache.ofbiz.minilang.method.envops.Continue.ContinueElementException; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Implements the <iterate> element. |
| * |
| * @see <a href="https://cwiki.apache.org/confluence/display/OFBADMIN/Mini+Language+-+minilang+-+simple-method+-+Reference">Mini-language Referenc</a> |
| */ |
| public final class Iterate extends MethodOperation { |
| |
| public static final String module = Iterate.class.getName(); |
| |
| private final FlexibleMapAccessor<Object> entryFma; |
| private final FlexibleMapAccessor<Object> listFma; |
| private final List<MethodOperation> subOps; |
| |
| public Iterate(Element element, SimpleMethod simpleMethod) throws MiniLangException { |
| super(element, simpleMethod); |
| if (MiniLangValidate.validationOn()) { |
| MiniLangValidate.attributeNames(simpleMethod, element, "entry", "list"); |
| MiniLangValidate.expressionAttributes(simpleMethod, element, "entry", "list"); |
| MiniLangValidate.requiredAttributes(simpleMethod, element, "entry", "list"); |
| } |
| this.entryFma = FlexibleMapAccessor.getInstance(element.getAttribute("entry")); |
| this.listFma = FlexibleMapAccessor.getInstance(element.getAttribute("list")); |
| this.subOps = Collections.unmodifiableList(SimpleMethod.readOperations(element, simpleMethod)); |
| } |
| |
| @Override |
| public boolean exec(MethodContext methodContext) throws MiniLangException { |
| if (listFma.isEmpty()) { |
| if (Debug.verboseOn()) |
| Debug.logVerbose("Collection not found, doing nothing: " + this, module); |
| return true; |
| } |
| Object oldEntryValue = entryFma.get(methodContext.getEnvMap()); |
| Object objList = listFma.get(methodContext.getEnvMap()); |
| if (objList instanceof EntityListIterator) { |
| EntityListIterator eli = (EntityListIterator) objList; |
| GenericValue theEntry; |
| try { |
| while ((theEntry = eli.next()) != null) { |
| entryFma.put(methodContext.getEnvMap(), theEntry); |
| 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; |
| } |
| } |
| } finally { |
| try { |
| eli.close(); |
| } catch (GenericEntityException e) { |
| throw new MiniLangRuntimeException("Error closing entityListIterator: " + e.getMessage(), this); |
| } |
| } |
| } else if (objList instanceof Collection<?>) { |
| Collection<Object> theCollection = UtilGenerics.checkCollection(objList); |
| if (theCollection.size() == 0) { |
| if (Debug.verboseOn()) |
| Debug.logVerbose("Collection has zero entries, doing nothing: " + this, module); |
| return true; |
| } |
| for (Object theEntry : theCollection) { |
| entryFma.put(methodContext.getEnvMap(), theEntry); |
| 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; |
| } |
| } |
| } else if (objList instanceof Iterator<?>) { |
| Iterator<Object> theIterator = UtilGenerics.cast(objList); |
| if (!theIterator.hasNext()) { |
| if (Debug.verboseOn()) |
| Debug.logVerbose("Iterator has zero entries, doing nothing: " + this, module); |
| return true; |
| } |
| while (theIterator.hasNext()) { |
| Object theEntry = theIterator.next(); |
| entryFma.put(methodContext.getEnvMap(), theEntry); |
| 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; |
| } |
| } |
| } else { |
| if (Debug.verboseOn()) { |
| Debug.logVerbose("Cannot iterate over a " + objList == null ? "null object" : objList.getClass().getName() |
| + ", doing nothing: " + this, module); |
| } |
| return true; |
| } |
| entryFma.put(methodContext.getEnvMap(), oldEntryValue); |
| return true; |
| } |
| |
| @Override |
| public void gatherArtifactInfo(ArtifactInfoContext aic) { |
| for (MethodOperation method : this.subOps) { |
| method.gatherArtifactInfo(aic); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder("<iterate "); |
| if (!this.entryFma.isEmpty()) { |
| sb.append("entry=\"").append(this.entryFma).append("\" "); |
| } |
| if (!this.listFma.isEmpty()) { |
| sb.append("list=\"").append(this.listFma).append("\" "); |
| } |
| sb.append("/>"); |
| return sb.toString(); |
| } |
| |
| /** |
| * A factory for the <iterate> element. |
| */ |
| public static final class IterateFactory implements Factory<Iterate> { |
| @Override |
| public Iterate createMethodOperation(Element element, SimpleMethod simpleMethod) throws MiniLangException { |
| return new Iterate(element, simpleMethod); |
| } |
| |
| @Override |
| public String getName() { |
| return "iterate"; |
| } |
| } |
| } |