80 lines
2.1 KiB
Java
80 lines
2.1 KiB
Java
/*
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* Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package li.strolch.persistence.api;
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import java.text.MessageFormat;
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import li.strolch.agent.api.ResourceMap;
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import li.strolch.exception.StrolchException;
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import li.strolch.model.Resource;
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import li.strolch.service.api.Command;
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import li.strolch.utils.dbc.DBC;
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/**
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* @author Robert von Burg <eitch@eitchnet.ch>
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*/
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public class RemoveResourceCommand extends Command {
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private Resource resource;
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private boolean removed;
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/**
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* @param tx
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*/
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public RemoveResourceCommand(StrolchTransaction tx) {
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super(tx);
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}
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/**
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* @param resource
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* the resource to set
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*/
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public void setResource(Resource resource) {
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this.resource = resource;
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}
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@Override
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public void validate() {
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DBC.PRE.assertNotNull("Resource may not be null!", this.resource);
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}
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@Override
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public void doCommand() {
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tx().lock(this.resource);
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ResourceMap resourceMap = tx().getResourceMap();
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if (!resourceMap.hasElement(tx(), this.resource.getType(), this.resource.getId())) {
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String msg = "The Resource {0} can not be removed as it does not exist!!";
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msg = MessageFormat.format(msg, this.resource.getLocator());
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throw new StrolchException(msg);
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}
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resourceMap.remove(tx(), this.resource);
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this.removed = true;
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}
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@Override
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public void undo() {
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if (this.resource != null && tx().isRollingBack() && this.removed) {
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if (tx().isVersioningEnabled())
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tx().getResourceMap().undoVersion(tx(), this.resource);
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else
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tx().getResourceMap().add(tx(), this.resource);
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}
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}
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}
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