| /* |
| * 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; |
| } |
| } |
| } |