/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdi.internal;

import com.sun.jdi.PrimitiveType;

/**
 * this class implements the corresponding interfaces declared by the JDI
 * specification. See the com.sun.jdi package for more information.
 * 
 */
public abstract class PrimitiveTypeImpl extends TypeImpl implements
		PrimitiveType {
	/**
	 * Creates new instance.
	 */
	public PrimitiveTypeImpl(String description, VirtualMachineImpl vmImpl,
			String name, String signature) {
		super(description, vmImpl, name, signature);
	}

	/**
	 * Creates new instance based on primitive signature.
	 */
	public static PrimitiveTypeImpl create(VirtualMachineImpl vmImpl,
			String signature) {
		// Notice that Primitive Types are not stored or cached because they
		// don't 'remember' any information.

		// See JNI 1.1 Specification, Table 3-2 Java VM Type Signatures.
		switch (signature.charAt(0)) {
		case 'Z':
			return new BooleanTypeImpl(vmImpl);
		case 'B':
			return new ByteTypeImpl(vmImpl);
		case 'C':
			return new CharTypeImpl(vmImpl);
		case 'S':
			return new ShortTypeImpl(vmImpl);
		case 'I':
			return new IntegerTypeImpl(vmImpl);
		case 'J':
			return new LongTypeImpl(vmImpl);
		case 'F':
			return new FloatTypeImpl(vmImpl);
		case 'D':
			return new DoubleTypeImpl(vmImpl);
		}
		throw new InternalError(
				JDIMessages.PrimitiveTypeImpl_Invalid_primitive_signature____1
						+ signature + JDIMessages.PrimitiveTypeImpl___2); //
	}

	/**
	 * @returns primitive type tag.
	 */
	public abstract byte tag();

	/**
	 * @return Returns modifier bits.
	 */
	@Override
	public int modifiers() {
		throw new InternalError(
				JDIMessages.PrimitiveTypeImpl_A_PrimitiveType_does_not_have_modifiers_3);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		return obj instanceof PrimitiveTypeImpl
				&& tag() == ((PrimitiveTypeImpl) obj).tag()
				&& virtualMachine().equals(
						((PrimitiveTypeImpl) obj).virtualMachine());
	}
}