| /* |
| * 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.cas.metadata; |
| |
| //OODT imports |
| import org.apache.oodt.cas.metadata.exceptions.MetExtractionException; |
| |
| //JDK imports |
| import java.io.File; |
| import java.net.URI; |
| import java.net.URL; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * @author mattmann |
| * @author bfoster |
| * @version $Revision$ |
| * |
| * <p> |
| * A core {@link MetExtractor} implementation, implementing all methods but {{@link #extractMetadata(File)} |
| * </p>. |
| */ |
| public abstract class AbstractMetExtractor implements MetExtractor { |
| |
| protected MetExtractorConfig config; |
| |
| protected MetExtractorConfigReader reader; |
| |
| protected static final Logger LOG = Logger |
| .getLogger(AbstractMetExtractor.class.getName()); |
| |
| public AbstractMetExtractor(MetExtractorConfigReader reader) { |
| this.reader = reader; |
| } |
| |
| /** |
| * Extracts {@link Metadata} from the given {@link File} |
| * |
| * @param file |
| * The {@link File} from which {@link Metadata} will be extracted |
| * @return The {@link Metadata} extracted |
| * @throws MetExtractionException |
| * If any error occurs |
| */ |
| protected abstract Metadata extrMetadata(File file) |
| throws MetExtractionException; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.io.File) |
| */ |
| public Metadata extractMetadata(File f) throws MetExtractionException { |
| if (f == null || !f.exists()) |
| throw new MetExtractionException("File '" + f + "' does not exist"); |
| return this.extrMetadata(this.safeGetCanonicalFile(f)); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.lang.String) |
| */ |
| public Metadata extractMetadata(String filePath) |
| throws MetExtractionException { |
| return extractMetadata(new File(filePath)); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.net.URL) |
| */ |
| public Metadata extractMetadata(URL fileUrl) throws MetExtractionException { |
| try { |
| return this.extractMetadata(this.safeGetFileFromUri(fileUrl)); |
| } catch (Exception e) { |
| throw new MetExtractionException( |
| "Failed to extract metadata from URL '" + fileUrl + "' : " |
| + e.getMessage()); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.io.File, |
| * java.io.File) |
| */ |
| public Metadata extractMetadata(File f, File configFile) |
| throws MetExtractionException { |
| this.setConfigFile(configFile); |
| return this.extractMetadata(f); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.io.File, |
| * java.lang.String) |
| */ |
| public Metadata extractMetadata(File f, String configFilePath) |
| throws MetExtractionException { |
| return extractMetadata(f, new File(configFilePath)); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.io.File, |
| * org.apache.oodt.cas.metadata.MetExtractorConfig) |
| */ |
| public Metadata extractMetadata(File f, MetExtractorConfig config) |
| throws MetExtractionException { |
| this.setConfigFile(config); |
| return this.extractMetadata(f); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#extractMetadata(java.net.URL, |
| * org.apache.oodt.cas.metadata.MetExtractorConfig) |
| */ |
| public Metadata extractMetadata(URL fileUrl, MetExtractorConfig config) |
| throws MetExtractionException { |
| this.setConfigFile(config); |
| return this.extractMetadata(fileUrl); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#setConfigFile(java.io.File) |
| */ |
| public void setConfigFile(File f) throws MetExtractionException { |
| try { |
| this.setConfigFile(this.reader.parseConfigFile(this |
| .safeGetCanonicalFile(f))); |
| } catch (Exception e) { |
| throw new MetExtractionException("Failed to parse config file : " |
| + e.getMessage()); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#setConfigFile(org.apache.oodt.cas.metadata.MetExtractorConfig) |
| */ |
| public void setConfigFile(MetExtractorConfig config) { |
| this.config = config; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.apache.oodt.cas.metadata.MetExtractor#setConfigFile(java.lang.String) |
| */ |
| public void setConfigFile(String filePath) throws MetExtractionException { |
| setConfigFile(new File(filePath)); |
| } |
| |
| private File safeGetFileFromUri(URL url) { |
| try { |
| return new File(new URI(url.toExternalForm())); |
| } catch (Exception e) { |
| LOG.log(Level.WARNING, "Exception constructing file from uri: [" |
| + url + "]: Message: " + e.getMessage()); |
| return null; |
| } |
| } |
| |
| private File safeGetCanonicalFile(File f) { |
| try { |
| return f.getCanonicalFile(); |
| } catch (Exception e) { |
| LOG.log(Level.WARNING, "Exception get canonical file for file : [" |
| + f + "]: Message: " + e.getMessage()); |
| return null; |
| } |
| } |
| } |