/*
* ModeShape (http://www.modeshape.org)
*
* 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.
*/
package org.modeshape.jcr.mimetype;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import javax.jcr.Binary;
import javax.jcr.RepositoryException;
import org.modeshape.common.util.StringUtil;
import org.modeshape.schematic.annotation.ThreadSafe;
/**
* A {@link MimeTypeDetector} implementation which uses a properties file to load existing mime types and decides based on the
* name of a binary what the mime type is.
*
* @author Horia Chiorean (hchiorea@redhat.com)
*/
@ThreadSafe
public final class DefaultMimeTypeDetector implements MimeTypeDetector {
private final Map<String, String> mimeTypes;
public DefaultMimeTypeDetector() {
mimeTypes = loadMimeTypes();
}
private Map<String, String> loadMimeTypes() {
try (BufferedReader reader =
new BufferedReader(new InputStreamReader(DefaultMimeTypeDetector.class.getResourceAsStream("mimetypes.properties")))) {
Map<String, String> result = new HashMap<>();
reader.lines().forEach(line -> {
String[] parts = line.split("\\s");
if (parts.length >= 2) {
String mimeType = parts[0];
for (int i = 1; i < parts.length; i++) {
String extension = parts[i].trim();
if (!StringUtil.isBlank(extension)) {
result.put(extension, mimeType);
}
}
}
});
return result;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public String mimeTypeOf(String name, Binary binaryValue) throws RepositoryException, IOException {
if (name == null) {
return null;
}
int lastDotIdx = name.lastIndexOf('.');
String extension = lastDotIdx > 0 && lastDotIdx + 1 < name.length() ? name.substring(lastDotIdx + 1) : name;
return mimeTypes.get(extension);
}
}