| /* |
| * 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.lenya.modules.metadata; |
| |
| import org.apache.lenya.cms.metadata.MetaData; |
| import org.apache.lenya.cms.publication.Document; |
| import org.apache.lenya.cms.publication.Publication; |
| import org.apache.lenya.cms.usecase.UsecaseInvoker; |
| import org.apache.lenya.cms.workflow.usecases.InvokeWorkflow; |
| |
| /** |
| * Save a meta data element. |
| */ |
| public class ChangeMetaData extends InvokeWorkflow { |
| |
| protected static final String PARAM_NAMESPACE = "namespace"; |
| protected static final String PARAM_ELEMENT = "element"; |
| protected static final String PARAM_VALUE = "value"; |
| protected static final String PARAM_OLD_VALUE = "oldValue"; |
| |
| private UsecaseInvoker usecaseInvoker; |
| |
| protected void prepareView() throws Exception { |
| super.prepareView(); |
| getUsecaseInvoker().invoke(getSourceURL(), getName(), getParameters()); |
| } |
| |
| protected void doCheckPreconditions() throws Exception { |
| super.doCheckPreconditions(); |
| |
| Document doc = getSourceDocument(); |
| if (doc == null) { |
| return; |
| } |
| if (!doc.getArea().equals(Publication.AUTHORING_AREA)) { |
| addErrorMessage("This usecase can only be invoked in the authoring area!"); |
| return; |
| } |
| |
| String namespace = getParameterAsString(PARAM_NAMESPACE); |
| assert namespace != null; |
| String element = getParameterAsString(PARAM_ELEMENT); |
| assert element != null; |
| String value = getParameterAsString(PARAM_VALUE); |
| assert value != null; |
| String oldValue = getParameterAsString(PARAM_OLD_VALUE); |
| assert oldValue != null; |
| |
| MetaData meta = getSourceDocument().getMetaData(namespace); |
| |
| String currentValue = meta.getFirstValue(element); |
| if (currentValue == null) { |
| currentValue = ""; |
| } |
| |
| if (!oldValue.equals(currentValue)) { |
| addErrorMessage("concurrent-change"); |
| } |
| } |
| |
| protected void doExecute() throws Exception { |
| |
| super.doExecute(); |
| |
| String namespace = getParameterAsString(PARAM_NAMESPACE); |
| assert namespace != null; |
| String element = getParameterAsString(PARAM_ELEMENT); |
| assert element != null; |
| String value = getParameterAsString(PARAM_VALUE); |
| assert value != null; |
| String oldValue = getParameterAsString(PARAM_OLD_VALUE); |
| assert oldValue != null; |
| |
| MetaData meta = getSourceDocument().getMetaData(namespace); |
| meta.setValue(element, value); |
| } |
| |
| protected UsecaseInvoker getUsecaseInvoker() { |
| return usecaseInvoker; |
| } |
| |
| /** |
| * TODO: Bean wiring |
| */ |
| public void setUsecaseInvoker(UsecaseInvoker usecaseInvoker) { |
| this.usecaseInvoker = usecaseInvoker; |
| } |
| |
| } |