/*
* 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.crawl;
//OODT imports
import org.apache.oodt.cas.metadata.MetExtractor;
import org.apache.oodt.cas.metadata.Metadata;
import org.apache.oodt.cas.metadata.exceptions.MetExtractionException;
import org.apache.oodt.cas.metadata.filenaming.NamingConvention;
import org.apache.oodt.cas.metadata.preconditions.PreConditionComparator;
//JDK imports
import java.io.File;
import java.util.ArrayList;
import java.util.List;
//Spring imports
import org.springframework.beans.factory.annotation.Required;
/**
* @author mattmann
* @author bfoster
* @version $Revision$
*
* <p>
* A variant of the Standard Product Crawler where .met files are generated on
* the fly as product files are encountered.
* </p>
*/
public class MetExtractorProductCrawler extends ProductCrawler {
private MetExtractor metExtractor;
private String metExtractorConfig;
private List<String> preCondIds = new ArrayList<String>();
private String namingConventionId;
@Override
protected Metadata getMetadataForProduct(File product) throws Exception {
return metExtractor.extractMetadata(product);
}
@Override
protected boolean passesPreconditions(File product) {
if (this.getPreCondIds() != null) {
for (String preCondId : this.getPreCondIds()) {
if (!((PreConditionComparator<?>) this.getApplicationContext()
.getBean(preCondId)).passes(product))
return false;
}
}
return product.exists() && product.length() > 0;
}
@Override
protected File renameProduct(File product, Metadata productMetadata)
throws Exception {
if (getNamingConventionId() != null) {
NamingConvention namingConvention = (NamingConvention)
getApplicationContext().getBean(getNamingConventionId());
if (namingConvention == null) {
throw new Exception("NamingConvention Id '" + getNamingConventionId()
+ "' is not defined");
}
return namingConvention.rename(product, productMetadata);
} else {
return product;
}
}
@Required
public void setMetExtractor(String metExtractor)
throws MetExtractionException, InstantiationException,
IllegalAccessException, ClassNotFoundException {
this.metExtractor = (MetExtractor) Class.forName(metExtractor)
.newInstance();
if (metExtractorConfig != null && !metExtractorConfig.equals(""))
this.metExtractor.setConfigFile(metExtractorConfig);
}
@Required
public void setMetExtractorConfig(String metExtractorConfig)
throws MetExtractionException {
this.metExtractorConfig = metExtractorConfig;
if (this.metExtractor != null && metExtractorConfig != null
&& !metExtractorConfig.equals(""))
this.metExtractor.setConfigFile(metExtractorConfig);
}
public List<String> getPreCondIds() {
return preCondIds;
}
public void setPreCondIds(List<String> preCondIds) {
this.preCondIds = preCondIds;
}
public void setNamingConventionId(String namingConventionId) {
this.namingConventionId = namingConventionId;
}
public String getNamingConventionId() {
return namingConventionId;
}
}