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/*-
* ============LICENSE_START=======================================================
* onap
* ================================================================================
* Copyright (C) 2016 - 2017 ONAP
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.core.utils;
import java.io.File;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.util.Optional;
import org.osgi.framework.Bundle;
import org.osgi.framework.FrameworkUtil;
/**
* Resolves project properties files relative to the directory identified by the JRE property
* <code>dblib.properties</code>.
*/
public class JREFileResolver implements PropertiesFileResolver {
/**
* Key for JRE argument representing the configuration directory
*/
private final String successMessage;
private final Class<?> clazz;
public JREFileResolver(final String successMessage, final Class<?> clazz) {
this.successMessage = successMessage;
this.clazz = clazz;
}
/**
* Parse a properties file location based on JRE argument
*
* @return an Optional File containing the location if it exists, or an empty Optional
*/
@Override
public Optional<File> resolveFile(final String filename) {
final Bundle bundle;
try {
bundle = FrameworkUtil.getBundle(this.clazz);
} catch (NoClassDefFoundError e) {
return Optional.empty();
}
final File dataFile;
try {
if (bundle == null) {
return Optional.empty();
}
URL jreArgumentEntry = bundle.getEntry(filename);
if (jreArgumentEntry == null) {
return Optional.empty();
}
dataFile = bundle.getDataFile(filename);
if(dataFile.exists()) {
dataFile.delete();
}
try (InputStream input = jreArgumentEntry.openStream()){
Files.copy(input, dataFile.toPath());
} catch(Exception exc) {
return Optional.empty();
}
return Optional.of(dataFile);
} catch (NoClassDefFoundError e) {
return Optional.empty();
}
catch(final Exception e) {
return Optional.empty();
}
}
@Override
public String getSuccessfulResolutionMessage() {
return this.successMessage;
}
}
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