| /** |
| * 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.oodt.pcs.query; |
| |
| //OODT imports |
| import org.apache.oodt.pcs.util.FileManagerUtils; |
| import org.apache.oodt.cas.filemgr.structs.Element; |
| |
| /** |
| * Abstract functionality for PCS queries. |
| * |
| * @author mattmann |
| * @version $Revision$ |
| */ |
| public abstract class AbstractPCSQuery implements PCSQuery { |
| |
| /* interface to the file manager so we can look up elem defs */ |
| protected FileManagerUtils fm = null; |
| |
| /** |
| * Constructs a new AbstractOCOQuery using the given {@link FileManagerUtils} |
| * file manager interface. |
| * |
| * @param fm |
| * The interface to the File Manager. |
| */ |
| protected AbstractPCSQuery(FileManagerUtils fm) { |
| this.fm = fm; |
| } |
| |
| /** |
| * Wrapper method around {@link #fm.safeGetElementByName}. |
| * |
| * @param elemName |
| * The name of the metadata element to obtain the ID for. |
| * @return The String ID of the given <code>elemName</code>. |
| */ |
| protected String getElemId(String elemName) { |
| Element elem = fm.safeGetElementByName(elemName); |
| if (elem == null) |
| return null; |
| |
| return elem.getElementId(); |
| } |
| |
| } |