Java tutorial
/* * Copyright 2007 Andrew Wills * * Licensed 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.danann.cernunnos.xml; import org.dom4j.Node; import org.danann.cernunnos.AttributePhrase; import org.danann.cernunnos.Attributes; import org.danann.cernunnos.EntityConfig; import org.danann.cernunnos.Formula; import org.danann.cernunnos.Phrase; import org.danann.cernunnos.Reagent; import org.danann.cernunnos.ReagentType; import org.danann.cernunnos.SimpleFormula; import org.danann.cernunnos.SimpleReagent; import org.danann.cernunnos.Task; import org.danann.cernunnos.TaskRequest; import org.danann.cernunnos.TaskResponse; public final class DeleteNodeTask implements Task { // Instance Members. private Phrase node; /* * Public API. */ public static final Reagent NODE = new SimpleReagent("NODE", "@node", ReagentType.PHRASE, Node.class, "Optional node to be deleted. If not provided, the value of the " + "'Attributes.NODE' request attribute will be used.", new AttributePhrase(Attributes.NODE)); public Formula getFormula() { Reagent[] reagents = new Reagent[] { NODE }; final Formula rslt = new SimpleFormula(DeleteNodeTask.class, reagents); return rslt; } public void init(EntityConfig config) { // Instance Members. this.node = (Phrase) config.getValue(NODE); } public void perform(TaskRequest req, TaskResponse res) { Node n = (Node) node.evaluate(req, res); n.getParent().remove(n); } }