/*******************************************************************************
 * Copyright (c) 2000, 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
 *******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.lookup;

public final class BaseTypeBinding extends TypeBinding {
	public char[] simpleName;

	private char[] constantPoolName;

	BaseTypeBinding(int id, char[] name, char[] constantPoolName) {
		this.tagBits |= IsBaseType;
		this.id = id;
		this.simpleName = name;
		this.constantPoolName = constantPoolName;
	}

	/*
	 * Answer the receiver's constant pool name.
	 */

	public char[] constantPoolName() {
		return constantPoolName;
	}

	public PackageBinding getPackage() {
		return null;
	}

	/*
	 * Answer true if the receiver type can be assigned to the argument type
	 * (right)
	 */

	public final boolean isCompatibleWith(TypeBinding right) {
		if (this == right)
			return true;
		if (!right.isBaseType())
			return this == NullBinding;

		switch (right.id) {
		case T_boolean:
		case T_byte:
		case T_char:
			return false;
		case T_double:
			switch (id) {
			case T_byte:
			case T_char:
			case T_short:
			case T_int:
			case T_long:
			case T_float:
				return true;
			default:
				return false;
			}
		case T_float:
			switch (id) {
			case T_byte:
			case T_char:
			case T_short:
			case T_int:
			case T_long:
				return true;
			default:
				return false;
			}
		case T_long:
			switch (id) {
			case T_byte:
			case T_char:
			case T_short:
			case T_int:
				return true;
			default:
				return false;
			}
		case T_int:
			switch (id) {
			case T_byte:
			case T_char:
			case T_short:
				return true;
			default:
				return false;
			}
		case T_short:
			return (id == T_byte);
		}
		return false;
	}

	public static final boolean isNarrowing(int left, int right) {
		// can "left" store a "right" using some narrowing conversion
		// (is left smaller than right)

		switch (left) {
		case T_boolean:
			return right == T_boolean;
		case T_char:
		case T_byte:
			if (right == T_byte)
				return true;
		case T_short:
			if (right == T_short)
				return true;
			if (right == T_char)
				return true;
		case T_int:
			if (right == T_int)
				return true;
		case T_long:
			if (right == T_long)
				return true;
		case T_float:
			if (right == T_float)
				return true;
		case T_double:
			if (right == T_double)
				return true;
		default:
			return false;
		}
	}

	public static final boolean isWidening(int left, int right) {
		// can "left" store a "right" using some widening conversion
		// (is left "bigger" than right)

		switch (left) {
		case T_boolean:
			return right == T_boolean;
		case T_char:
			return right == T_char;
		case T_double:
			if (right == T_double)
				return true;
		case T_float:
			if (right == T_float)
				return true;
		case T_long:
			if (right == T_long)
				return true;
		case T_int:
			if (right == T_int)
				return true;
			if (right == T_char)
				return true;
		case T_short:
			if (right == T_short)
				return true;
		case T_byte:
			if (right == T_byte)
				return true;
		default:
			return false;
		}
	}

	public char[] qualifiedSourceName() {
		return simpleName;
	}

	public char[] readableName() {
		return simpleName;
	}

	public char[] shortReadableName() {
		return simpleName;
	}

	public char[] sourceName() {
		return simpleName;
	}

	public String toString() {
		return new String(constantPoolName) + " (id=" + id + ")"; //$NON-NLS-1$ //$NON-NLS-2$
	}
}
