/**
* Java Modular Image Synthesis Toolkit (JMIST)
* Copyright (C) 2008-2013 Bradley W. Kimmel
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package ca.eandb.jmist.framework.loader.openexr.attribute;
import java.io.DataInput;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import ca.eandb.util.UnexpectedException;
/**
* @author brad
*
*/
public final class AttributeFactory {
private Map<String, AttributeReader> readers = new HashMap<String, AttributeReader>();
private static AttributeFactory INSTANCE;
private AttributeFactory() {
registerClass(Box2f.class);
registerClass(Box2i.class);
registerClass(ChannelList.class);
registerClass(Chromaticities.class);
registerClass(CompressionMethod.class);
registerClass(FloatAttribute.class);
registerClass(LineOrder.class);
registerClass(StringAttribute.class);
registerClass(TileDescription.class);
registerClass(V2f.class);
registerClass(V2i.class);
registerClass(V3f.class);
registerClass(V3i.class);
}
private void registerClass(Class<?> clazz) {
OpenEXRAttributeType type = clazz.getAnnotation(OpenEXRAttributeType.class);
if (type == null) {
throw new RuntimeException("OpenEXRAttributeType annotation not present");
}
Method method;
try {
method = clazz.getMethod("read", DataInput.class, int.class);
} catch (SecurityException e) {
throw new UnexpectedException("Cannot access read method");
} catch (NoSuchMethodException e) {
throw new UnexpectedException("No read method");
}
registerAttributeReader(type.value(), new MethodAttributeReader(method));
}
public static synchronized final AttributeFactory getInstance() {
if (INSTANCE == null) {
INSTANCE = new AttributeFactory();
}
return INSTANCE;
}
public Attribute create(String type, int size, DataInput data) throws IOException {
AttributeReader reader = readers.get(type);
return reader != null ? reader.read(data, size) : null;
}
public void registerAttributeReader(String type, AttributeReader reader) {
readers.put(type, reader);
}
}