/*******************************************************************************
 * Copyright (c) 2014 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma.bytecode.accessors;

import java.lang.reflect.Field;

public class InvokeDynamicInfoAccessor
{
	private static Class<?> m_class;
	private static Field m_bootstrapIndex;
	private static Field m_nameAndTypeIndex;
	
	static
	{
		try
		{
			m_class = Class.forName( "javassist.bytecode.InvokeDynamicInfo" );
			m_bootstrapIndex = m_class.getDeclaredField( "bootstrap" );
			m_bootstrapIndex.setAccessible( true );
			m_nameAndTypeIndex = m_class.getDeclaredField( "nameAndType" );
			m_nameAndTypeIndex.setAccessible( true );
		}
		catch( Exception ex )
		{
			throw new Error( ex );
		}
	}
	
	public static boolean isType( ConstInfoAccessor accessor )
	{
		return m_class.isAssignableFrom( accessor.getItem().getClass() );
	}
	
	private Object m_item;
	
	public InvokeDynamicInfoAccessor( Object item )
	{
		m_item = item;
	}
	
	public int getBootstrapIndex( )
	{
		try
		{
			return (Integer)m_bootstrapIndex.get( m_item );
		}
		catch( Exception ex )
		{
			throw new Error( ex );
		}
	}
	
	public void setBootstrapIndex( int val )
	{
		try
		{
			m_bootstrapIndex.set( m_item, val );
		}
		catch( Exception ex )
		{
			throw new Error( ex );
		}
	}
	
	public int getNameAndTypeIndex( )
	{
		try
		{
			return (Integer)m_nameAndTypeIndex.get( m_item );
		}
		catch( Exception ex )
		{
			throw new Error( ex );
		}
	}
	
	public void setNameAndTypeIndex( int val )
	{
		try
		{
			m_nameAndTypeIndex.set( m_item, val );
		}
		catch( Exception ex )
		{
			throw new Error( ex );
		}
	}
}