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/*
* 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.harmony.x.imageio.metadata;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import javax.imageio.metadata.IIOMetadataFormat;
import javax.imageio.metadata.IIOMetadataFormatImpl;
public class IIOMetadataUtils {
private IIOMetadataUtils() {}
public static IIOMetadataFormat instantiateMetadataFormat(
String formatName, boolean standardFormatSupported,
String nativeMetadataFormatName, String nativeMetadataFormatClassName,
String [] extraMetadataFormatNames, String [] extraMetadataFormatClassNames
) {
if (formatName == null) {
throw new IllegalArgumentException("formatName == null!");
}
if (formatName.equals(IIOMetadataFormatImpl.standardMetadataFormatName)) {
if (standardFormatSupported) {
return IIOMetadataFormatImpl.getStandardFormatInstance();
}
}
String className = null;
if (formatName.equals(nativeMetadataFormatName)) {
className = nativeMetadataFormatClassName;
} else if (extraMetadataFormatNames != null) {
for (int i = 0; i < extraMetadataFormatNames.length; i++) {
if (formatName.equals(extraMetadataFormatNames[i])) {
className = extraMetadataFormatClassNames[i];
break;
}
}
}
if (className == null) {
throw new IllegalArgumentException("Unsupported format name");
}
// Get the context class loader and try to use it first
ClassLoader contextClassloader = AccessController.doPrivileged(
new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return Thread.currentThread().getContextClassLoader();
}
});
Class cls;
try {
cls = Class.forName(className, true, contextClassloader);
} catch (ClassNotFoundException e) {
try {
// Use current class loader
cls = Class.forName(className);
} catch (ClassNotFoundException e1) {
throw new IllegalStateException ("Can't obtain format");
}
}
try {
//???AWT:
//Method getInstance = cls.getMethod("getInstance");
//return (IIOMetadataFormat) getInstance.invoke(null);
return null;
} catch (Exception e) {
IllegalStateException e1 = new IllegalStateException("Can't obtain format");
e1.initCause(e); // Add some details to the message
throw e1;
}
}
}
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