package org.jolokia.converter.json.simplifier;
import java.io.File;
import java.io.IOException;
/*
* Copyright 2009-2013 Roland Huss
*
* 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.
*/
/**
* Special deserialization for Files to shorten the info
*
* @author roland
* @since Jul 27, 2009
*/
public class FileSimplifier extends SimplifierExtractor<File> {
/**
* Default constructor
*/
public FileSimplifier() {
super(File.class);
Object[][] attrExtractors = {
{ "name", new NameAttributeExtractor() },
{ "length", new LengthAttributeExtractor() },
{ "directory", new IsDirectoryAttributeExtractor() },
{ "canonicalPath", new PathAttributeExtractor() },
{ "exists", new ExistsAttributeExtractor() },
{ "lastModified", new LastModifiedAttributeExtractor()}
};
addExtractors(attrExtractors);
}
// ==========================================================================
// Static inner classes as usage extractors
private static class NameAttributeExtractor implements AttributeExtractor<File> {
/** {@inheritDoc} */
public Object extract(File file) { return file.getName(); }
}
private static class LengthAttributeExtractor implements AttributeExtractor<File> {
/** {@inheritDoc} */
public Object extract(File file) { return file.length(); }
}
private static class IsDirectoryAttributeExtractor implements AttributeExtractor<File> {
/** {@inheritDoc} */
public Object extract(File file) { return file.isDirectory(); }
}
private static class PathAttributeExtractor implements AttributeExtractor<File> {
/** {@inheritDoc} */
public Object extract(File file) {
try {
return file.getCanonicalPath();
} catch (IOException e) {
return null;
}
}
}
private static class ExistsAttributeExtractor implements AttributeExtractor<File> {
/** {@inheritDoc} */
public Object extract(File file) { return file.exists(); }
}
private static class LastModifiedAttributeExtractor implements AttributeExtractor<File> {
/** {@inheritDoc} */
public Object extract(File value) { return value.lastModified(); }
}
}