package org.eclipse.jdt.internal.core.builder.impl;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
import org.eclipse.jdt.internal.core.Assert;
import org.eclipse.jdt.internal.core.builder.*;

import java.util.Hashtable;

public class PrimitiveTypeHandleImpl extends TypeImpl implements IType {
	JavaDevelopmentContextImpl fDevelopmentContext;
	int fTypeCode;

	/*
	 * Type codes
	 */
	static final int TC_BOOLEAN   = 0;
	static final int TC_BYTE   	 = 1;
	static final int TC_CHAR      = 2;
	static final int TC_SHORT     = 3;
	static final int TC_INT       = 4;
	static final int TC_LONG      = 5;
	static final int TC_FLOAT     = 6;
	static final int TC_DOUBLE    = 7;
	static final int TC_ARRAY     = 9;
	static final int TC_CLASS     = 10;
	static final int TC_VOID      = 11;
/**
 * Creates a new primitive type with the given type code
 */
PrimitiveTypeHandleImpl(JavaDevelopmentContextImpl dc, char typeCode) {
	fDevelopmentContext = dc;
	switch (typeCode) {
		case 'I' :
			fTypeCode = TC_INT;
			break;
		case 'F' :
			fTypeCode = TC_FLOAT;
			break;
		case 'V' :
			fTypeCode = TC_VOID;
			break;
		case 'Z' :
			fTypeCode = TC_BOOLEAN;
			break;
		case 'B' :
			fTypeCode = TC_BYTE;
			break;
		case 'S' :
			fTypeCode = TC_SHORT;
			break;
		case 'C' :
			fTypeCode = TC_CHAR;
			break;
		case 'J' :
			fTypeCode = TC_LONG;
			break;
		case 'D' :
			fTypeCode = TC_DOUBLE;
			break;
	}
}
/**
 * Appends the signature for this type to the StringBuffer
 * If includeUnnamed is true, then the identifiers for unnamed packages
 * are included, preceded by '$'.  Otherwise, they are excluded.
 */
void appendSignature(StringBuffer sb, boolean includeUnnamed) {
	char sig;
	switch (fTypeCode) {
		case TC_BOOLEAN :
			sig = 'Z';
			break;
		case TC_BYTE :
			sig = 'B';
			break;
		case TC_CHAR :
			sig = 'C';
			break;
		case TC_DOUBLE :
			sig = 'D';
			break;
		case TC_FLOAT :
			sig = 'F';
			break;
		case TC_INT :
			sig = 'I';
			break;
		case TC_LONG :
			sig = 'J';
			break;
		case TC_SHORT :
			sig = 'S';
			break;
		case TC_VOID :
			sig = 'V';
			break;
		default :
			sig = ' ';
	}
	sb.append(sig);
}
	/**
	 * Appends the VM signature of the type to the StringBuffer.  
	 */
	void appendVMSignature(StringBuffer sb) {
		sb.append(typeSignature(fTypeCode));
	}
	/**
	 * Compares this object against the specified object.
	 *	Returns true if the objects are the same.
	 */
	public boolean equals(Object o) {
		if (this == o) return true;
		if (!(o instanceof PrimitiveTypeHandleImpl)) return false;

		PrimitiveTypeHandleImpl prim = (PrimitiveTypeHandleImpl) o;
		return fTypeCode == prim.fTypeCode &&
			fDevelopmentContext.equals(prim.fDevelopmentContext);
	}
public JavaDevelopmentContextImpl getInternalDC() {
	return fDevelopmentContext;
}
/**
 * Returns the fully-qualified name of the type (class, interface,
 * array, or primitive) represented by this object, as a String.
 * For classes and interfaces, the name is the VM class name, 
 * including the package name.
 * For inner classes, the name is as described in the 
 * <em>Inner Classes Specification</em>.
 * For array types, the name is the name of the component type, followed by '[]'.
 * For primitive types, the name is the keyword for the primitive type.
 * This is a handle-only method.
 */
public String getName() {
	return getSimpleName();
}
/**
 * Returns the simple name of the type (class, interface, array, 
 * or primitive) represented by this object, as a String.
 * For classes and interfaces, this is the VM class name, 
 * excluding the package name.
 * For array types, this is the simple name of the component type, followed by '[]'.
 * For primitive types, this is the keyword for the primitive type.
 * This is a handle-only method.
 */
public String getSimpleName() {
	switch (fTypeCode) {
		case TC_BOOLEAN :
			return "boolean"/*nonNLS*/;
		case TC_BYTE :
			return "byte"/*nonNLS*/;
		case TC_CHAR :
			return "char"/*nonNLS*/;
		case TC_DOUBLE :
			return "double"/*nonNLS*/;
		case TC_FLOAT :
			return "float"/*nonNLS*/;
		case TC_INT :
			return "int"/*nonNLS*/;
		case TC_LONG :
			return "long"/*nonNLS*/;
		case TC_SHORT :
			return "short"/*nonNLS*/;
		case TC_VOID :
			return "void"/*nonNLS*/;
		default :
	}
	return null;
}
	int getTypeCode() {
		return fTypeCode;
	}
	/**
	 * Returns the VM signature of the type.  
	 */
	String getVMSignature() {
		return typeSignature(fTypeCode);
	}
	/**
	 * Returns a consistent hash code for this object
	 */
	public int hashCode() {
		return fTypeCode;
	}
/**
 * Returns a state specific version of this handle in the given state.
 */
public IHandle inState(IState s) throws org.eclipse.jdt.internal.core.builder.StateSpecificException {
	
	return new PrimitiveTypeHandleImplSWH((StateImpl) s, this);
}
/**
 * Determines if the specified Type object represents a primitive Java
 * type.
 * This is a handle-only method.
 * 
 * <p>There are nine predefined Type objects to represent the eight
 * primitive Java types and void.  These are created by the Java
 * Virtual Machine, and have the same names as the primitive types
 * that they represent, namely boolean, byte, char, short, int,
 * long, float, and double, and void.
 */
public boolean isPrimitive() {
	return true;
}
	/**
	 * Returns a string representation of the package.  For debugging purposes
	 * only (NON-NLS).
	 */
	public String toString() {
		return getName();
	}
/**
 * Convert a base type code to the VM naming format
 */
protected static String typeSignature(int typeCode) {
	switch (typeCode) {
		case TC_VOID :
			return "V"/*nonNLS*/;
		case TC_BOOLEAN :
			return "Z"/*nonNLS*/;
		case TC_BYTE :
			return "B"/*nonNLS*/;
		case TC_CHAR :
			return "C"/*nonNLS*/;
		case TC_SHORT :
			return "S"/*nonNLS*/;
		case TC_INT :
			return "I"/*nonNLS*/;
		case TC_LONG :
			return "J"/*nonNLS*/;
		case TC_FLOAT :
			return "F"/*nonNLS*/;
		case TC_DOUBLE :
			return "D"/*nonNLS*/;
		default :
			return "unknown"/*nonNLS*/;
	}
}
}