package org.eclipse.jem.internal.proxy.ide;
/*******************************************************************************
 * Copyright (c)  2001, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
/*
 *  $RCSfile: IDEArrayBeanTypeProxy.java,v $
 *  $Revision: 1.1 $  $Date: 2003/10/27 17:22:23 $ 
 */

import org.eclipse.jem.internal.proxy.core.*;
import java.lang.reflect.*;
/**
 * Array Type Proxy for the IDE VM.
 *
 * The class is final because array's are special and shouldn't have
 * any subclasses since the factory would never call it.
 */

public final class IDEArrayBeanTypeProxy extends IDEBeanTypeProxy implements IArrayBeanTypeProxy {
	
	IBeanTypeProxy fFinalComponentType;
	IBeanTypeProxy fComponentType;
	String fTypeName;
/**
 * Create with a registry and a class. It is package so that only 
 * the factory with this IDE package can call it.
 */
IDEArrayBeanTypeProxy(IDEProxyFactoryRegistry aRegistry, String aTypeName, Class aClass) {
	// The class of an Array is always Object
	super(aRegistry,aClass);
	fTypeName = aTypeName;
}
/**
 * This is an array type!
 */
public boolean isArray() {
	return true;
}
public String getTypeName(){
	return fTypeName;
}
/**
 * Return the final component type.
 */
public IBeanTypeProxy getFinalComponentType() {
	if ( fFinalComponentType == null ) {
		// Component type is strip off all '[' and return class name (if we ever add classLoader support, this won't work).
		// However, if the type is a primitive we need to go through the change table).
		int typeStart = getTypeName().lastIndexOf('[')+1;
		if (getTypeName().charAt(typeStart) == 'L') {
			// It is a class.
			// Strip off up to the 'L', and the trailing ';'. That is the class name.
			fFinalComponentType = fProxyFactoryRegistry.getBeanTypeProxyFactory().getBeanTypeProxy(getTypeName().substring(typeStart+1, getTypeName().length()-1));
		} else {
			// It is a type. Need to map it.
			Class aType = (Class) IDEStandardBeanTypeProxyFactory.MAP_SHORTSIG_TO_TYPE.get(getTypeName().substring(typeStart, typeStart+1));
			fFinalComponentType = aType != null ? fProxyFactoryRegistry.getBeanTypeProxyFactory().getBeanTypeProxy(aType.getName()) : null;
		}
	}
	return fFinalComponentType;
}
/**
 * Return the component type.
 */
public IBeanTypeProxy getComponentType() {
	if ( fComponentType == null ) {
		// Component type is strip off first '[' and return class name (if we ever add classLoader support, this won't work).
		// However, if the type is a primitive we need to go through the change table).
		if (getTypeName().charAt(1) != '[') {
			// It is a one dimensional array, just send to getFinalComponentType to figure out the type.
			fComponentType = getFinalComponentType();
		} else {
			// It is a multi-dimensional array. Just strip off one '[' and send that to the bean type factory.
			fComponentType = fProxyFactoryRegistry.getBeanTypeProxyFactory().getBeanTypeProxy(getTypeName().substring(1));
		}
	} 
	return fComponentType;
}
/**
 * Return the number of dimensions.
 */
public int getDimensions() {
	return getTypeName().lastIndexOf('[')+1;
}
/**
 * Return the null ctor proxy for this method with these arguments.
 * For all of the array types, this is an invalid operation.	 
 */		
public IConstructorProxy getNullConstructorProxy() {	
	throw new UnsupportedOperationException();
}
	
/**
 * Return a proxy to the constructor for the target VM being the same as the REM
 * For all of the array types, this is an invalid operation.	 
 */
public IConstructorProxy getConstructorProxy(String[] argumentClassNames) {	
	throw new UnsupportedOperationException();
}
/**
 * Return a proxy to the constructor for the target VM being the same as the REM
 * For all of the array types, this is an invalid operation.	 
 */
public IConstructorProxy getConstructorProxy(IBeanTypeProxy[] argumentTypes) {	
	throw new UnsupportedOperationException();
}	
/**
 * Return a proxy to the field for the target VM being the same as the REM
 * For all of the array types, this is an invalid operation.	 
 */	
public IFieldProxy getFieldProxy(String fieldName) {	
	throw new UnsupportedOperationException();
}
/**
 * Return the method proxy for this method with these arguments.
 * For all of the array types, this is an invalid operation.	 
 */
public IMethodProxy getMethodProxy(String methodName, IBeanTypeProxy[] argumentTypes) {
	throw new UnsupportedOperationException();
}
/**
 * Return the method proxy for this method with these arguments.
 * For all of the array types, this is an invalid operation.	 
 */
public IMethodProxy getMethodProxy(String methodName, String[] argumentClassNames) {
	throw new UnsupportedOperationException();
}
/**
 * Return the method proxy for this method with these arguments.
 * For all of the array types, this is an invalid operation.	 
 */	
public IMethodProxy getMethodProxy(String methodName, String argumentQualifiedTypeName) {
	throw new UnsupportedOperationException();
}
/**
 * Return the method proxy for this method with these arguments.
 * For all of the array types, this is an invalid operation.	 
 */		
public IMethodProxy getMethodProxy(String methodName) {	
	throw new UnsupportedOperationException();
}
/**
 * Create an array bean proxy.
 *
 *   - (int, new int[2] {3, 4}) will create:
 *      int [3] [4]
 *
 *   - (int[], new int[1] {1})
 *      int [1]
 *
 *   - (int[], new int[2] {2,3})
 *      int [2] [3]
 * 
 *
 *   - (int[], null) or (int[], new int[0]) or (int, null) or (int, new int[0])
 *      int [0]
 *     (int[][], null) or (int[][], new int[0])
 *      int[0][]
 *     This is because an array instance with no dimensions specified is not valid. 
 *
 *   - (int[][], new int[1] {3})
 *      int[3][]
 *
 * It is package protected so that only the REM Factory can call it.
 */
IDEArrayBeanProxy  createBeanProxyWith(int[] dimensions) throws ThrowableProxy {
	// If the dimensions is null or zero length, then create the
	// array as a 0 sized array one dimensional array.
	if (dimensions == null || dimensions.length == 0)
		return createBeanProxyWith(new int[] {0});
		
	// Remove from this type the number of dimensions specified
	// coming in, up to but no further than the final component.
	// From here we can then use the appropriate java.lang.reflect.Array
	// method to create the array.
	IBeanTypeProxy compType = null;	// The type of array to create (it may be different number of dimensions).
	int numDims = getDimensions();
	if (numDims <= dimensions.length)
		compType = getFinalComponentType();	// There are the same or more requested dimensions, so use final component type
	else {
		// There are fewer requested dimensions, so strip off that many
		String compClass = getTypeName().substring(dimensions.length);
		compType = fProxyFactoryRegistry.getBeanTypeProxyFactory().getBeanTypeProxy(compClass);
	}
	
	if (dimensions.length == 1) {
		// Use the one dimension call
		Object array = Array.newInstance(((IDEBeanTypeProxy)compType).fClass,dimensions[0]);
		return new IDEArrayBeanProxy(fProxyFactoryRegistry,array,null);
	} else {
		// Use the multi dimension call
		Object array = Array.newInstance(((IDEBeanTypeProxy)compType).fClass,dimensions);
		return new IDEArrayBeanProxy(fProxyFactoryRegistry,array,null);
	}
}
/**
 * Create a new bean proxy with the specified object
 */
protected IIDEBeanProxy newBeanProxy(Object anObject){

	return new IDEArrayBeanProxy(fProxyFactoryRegistry, anObject, this);

}	

/**
 * @see IBeanTypeProxy#getFormalTypeName()
 */
public String getFormalTypeName() {
	String name = getTypeName();
	int dims = name.lastIndexOf('[') + 1;
	String type = getFinalComponentType().getTypeName();
	StringBuffer formalType = new StringBuffer(type.length()+("[]".length()*dims)); //$NON-NLS-1$
	formalType.append(type);
	for (int i=0; i<dims; i++)
		formalType.append("[]"); //$NON-NLS-1$
	return formalType.toString();
}

}