/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.core.types.basic;
import java.sql.Array;
import java.sql.SQLException;
import org.teiid.core.CorePlugin;
import org.teiid.core.types.ArrayImpl;
import org.teiid.core.types.DataTypeManager;
import org.teiid.core.types.Transform;
import org.teiid.core.types.TransformationException;
public class ObjectToAnyTransform extends Transform {
public static final ObjectToAnyTransform INSTANCE = new ObjectToAnyTransform(Object.class);
private Class targetClass;
public ObjectToAnyTransform(Class targetClass) {
this.targetClass = targetClass;
}
/**
* Type of the incoming value.
* @return Source type
*/
public Class getSourceType() {
return DataTypeManager.DefaultDataClasses.OBJECT;
}
public Class getTargetType() {
return targetClass;
}
@Override
public Object transform(Object value, Class<?> targetType)
throws TransformationException {
if (value == null) {
return null;
}
if(targetType.isAssignableFrom(value.getClass())) {
return value;
}
Transform transform = DataTypeManager.getTransform(value.getClass(), targetType);
boolean valid = true;
if (transform instanceof ObjectToAnyTransform) {
Object v1 = DataTypeManager.convertToRuntimeType(value, true);
if (v1 != value) {
try {
return transform(v1, targetType);
} catch (TransformationException e) {
throw new TransformationException(
CorePlugin.Event.TEIID10076, e, CorePlugin.Util.gs(CorePlugin.Event.TEIID10076, getSourceType(),
targetClass, value));
}
}
//TODO: allow casts from integer[] to string[], etc.
if (targetType.isArray()) {
if (value instanceof Array) {
try {
//TODO: need to use the base type information for non-ArrayImpl values
Object array = ((Array)value).getArray();
if (targetType.isAssignableFrom(array.getClass())) {
if (!(value instanceof ArrayImpl)) {
return new ArrayImpl((Object[])array);
}
return value;
}
value = array;
} catch (SQLException e) {
throw new TransformationException(e);
}
}
if (value.getClass().isArray()
&& value.getClass().getComponentType().isPrimitive()
&& targetType.getComponentType().isAssignableFrom(convertPrimitiveToObject(value.getClass().getComponentType()))) {
Object[] result = new Object[java.lang.reflect.Array.getLength(value)];
for (int i = 0; i < result.length; i++) {
result[i] = java.lang.reflect.Array.get(value, i);
}
return new ArrayImpl(result);
}
}
valid = false;
}
if (transform == null || !valid) {
Object[] params = new Object[] { getSourceType(), targetType, value};
throw new TransformationException(CorePlugin.Event.TEIID10076, CorePlugin.Util.gs(CorePlugin.Event.TEIID10076, params));
}
try {
return transform.transform(value, targetType);
} catch (TransformationException e) {
Object[] params = new Object[] { getSourceType(), targetType, value};
throw new TransformationException(CorePlugin.Event.TEIID10076, e, CorePlugin.Util.gs(CorePlugin.Event.TEIID10076, params));
}
}
@Override
protected Object transformDirect(Object value)
throws TransformationException {
return value;
}
/**
* @see org.teiid.core.types.Transform#isExplicit()
*/
public boolean isExplicit() {
return true;
}
/**
* Convert a primitive class to the corresponding object class
* @param clazz
* @return
*/
public static Class<?> convertPrimitiveToObject(Class<?> clazz) {
if (!clazz.isPrimitive()) {
return clazz;
}
if ( clazz == Boolean.TYPE ) clazz = Boolean.class;
else if ( clazz == Character.TYPE ) clazz = Character.class;
else if ( clazz == Byte.TYPE ) clazz = Byte.class;
else if ( clazz == Short.TYPE ) clazz = Short.class;
else if ( clazz == Integer.TYPE ) clazz = Integer.class;
else if ( clazz == Long.TYPE ) clazz = Long.class;
else if ( clazz == Float.TYPE ) clazz = Float.class;
else if ( clazz == Double.TYPE ) clazz = Double.class;
return clazz;
}
}