org.eclipse.jdt.debug/jdi/org/eclipse/jdi/internal/ValueImpl.java - jdt/eclipse.jdt.debug - Git at Google

 /*******************************************************************************
  * 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 org.eclipse.jdi.internal;


 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.jdi.internal.jdwp.JdwpID;
 import org.eclipse.jdi.internal.jdwp.JdwpObjectID;

 import com.sun.jdi.InternalException;
 import com.sun.jdi.InvalidTypeException;
 import com.sun.jdi.PrimitiveType;
 import com.sun.jdi.Type;
 import com.sun.jdi.Value;

 /**
  * this class implements the corresponding interfaces
  * declared by the JDI specification. See the com.sun.jdi package
  * for more information.
  *
  */
 public abstract class ValueImpl extends MirrorImpl implements Value {
 	/**
 	 * Creates new ValueImpl.
 	 */
 	protected ValueImpl(String description, VirtualMachineImpl vmImpl) {
 		super(description, vmImpl);
 	}

 	/**
 	 * @returns type of value.
 	 */
 	public abstract Type type();

 	/**
 	 * @returns type of value.
 	 */
 	public abstract byte getTag();

 	/**
 	 * @return Reads JDWP representation and returns new instance.
 	 */
 	public static ValueImpl readWithTag(MirrorImpl target, DataInputStream in) throws IOException {
 		byte tag = target.readByte("object tag", JdwpID.tagMap(), in); //$NON-NLS-1$
 	   	return readWithoutTag(target, tag, in);
 	}

 	/**
 	 * @return Reads JDWP representation and returns new instance.
 	 */
 	public static ValueImpl readWithoutTag(MirrorImpl target, int type, DataInputStream in) throws IOException {
 		VirtualMachineImpl vmImpl = target.virtualMachineImpl();
 		// See also ArrayReference Impl.
 		switch(type) {
 			case ArrayReferenceImpl.tag:
 				return ArrayReferenceImpl.read(target, in);
 			case ClassLoaderReferenceImpl.tag:
 				return ClassLoaderReferenceImpl.read(target, in);
 			case ClassObjectReferenceImpl.tag:
 				return ClassObjectReferenceImpl.read(target, in);
 			case StringReferenceImpl.tag:
 				return StringReferenceImpl.read(target, in);
 			case ObjectReferenceImpl.tag:
 				return ObjectReferenceImpl.readObjectRefWithoutTag(target, in);
 			case ThreadGroupReferenceImpl.tag:
 				return ThreadGroupReferenceImpl.read(target, in);
 			case ThreadReferenceImpl.tag:
 				return ThreadReferenceImpl.read(target, in);
 			case BooleanValueImpl.tag:
 				return BooleanValueImpl.read(target, in);
 			case ByteValueImpl.tag:
 				return ByteValueImpl.read(target, in);
 			case CharValueImpl.tag:
 				return CharValueImpl.read(target, in);
 			case DoubleValueImpl.tag:
 				return DoubleValueImpl.read(target, in);
 			case FloatValueImpl.tag:
 				return FloatValueImpl.read(target, in);
 			case IntegerValueImpl.tag:
 				return IntegerValueImpl.read(target, in);
 			case LongValueImpl.tag:
 				return LongValueImpl.read(target, in);
 			case ShortValueImpl.tag:
 				return ShortValueImpl.read(target, in);
 			case VoidValueImpl.tag:
 				return new VoidValueImpl(vmImpl);
 			case 0:
 				return null;
 			default:
 				throw new InternalException(JDIMessages.getString("ValueImpl.Invalid_Value_tag_encountered___1") + type); //$NON-NLS-1$
 		}
 	}

 	/**
 	 * Writes value with value tag.
 	 */
 	public void writeWithTag(MirrorImpl target, DataOutputStream out) throws IOException {
 		target.writeByte(getTag(), "tag", JdwpID.tagMap(), out); //$NON-NLS-1$
 		write(target, out);
 	}

 	/**
 	 * Writes value without value tag.
 	 */
 	public abstract void write(MirrorImpl target, DataOutputStream out) throws IOException;

 	/**
 	 * Writes null value without value tag.
 	 */
 	public static void writeNull(MirrorImpl target, DataOutputStream out) throws IOException {
 		JdwpObjectID nullID = new JdwpObjectID(target.virtualMachineImpl());
 		nullID.write(out);
 		if (target.fVerboseWriter != null)
 			target.fVerboseWriter.println("objectReference", nullID.value()); //$NON-NLS-1$
 	}

 	/**
 	 * Writes null value with value tag.
 	 */
 	public static void writeNullWithTag(MirrorImpl target, DataOutputStream out) throws IOException {
 		target.writeByte(ObjectReferenceImpl.tag, "tag", JdwpID.tagMap(), out); //$NON-NLS-1$
 		writeNull(target, out);
 	}

 	/**
 	 * Check the type and the vm of each values, according to the associated type.
 	 * For primitive values, convert the value for match the given type if needed.
 	 * The two list must have the same size.
 	 * @return the (converted) values.
 	 * @see checkValue(Value, Type, VirtualMachineImpl)
 	 */
 	protected static List checkValues(List values, List types, VirtualMachineImpl vm) throws InvalidTypeException {
 		List result= new ArrayList(values.size());
 		Iterator iterValues= values.iterator();
 		Iterator iterTypes= types.iterator();
 		while (iterValues.hasNext()) {
 			Value value= (Value)iterValues.next();
 			Type type= (Type)iterTypes.next();
 			result.add(checkValue(value, type, vm));
 		}
 		return result;
 	}

 	/**
 	 * Check the type and the vm of the given value.
 	 * In case of primitive value, the value is converted if needed.
 	 * @return the (converted) value.
 	 * @throws InvalidTypeException if the value and the type are not both
 	 * primitive or not primitive or, in case of primitive, if the given
 	 * value is no assignment compatible with the given type.
 	 * @see checkPrimitiveValue(PrimitiveValueImpl, PrimitiveTypeImpl, PrimitiveTypeImpl)
 	 */
 	protected static ValueImpl checkValue(Value value, Type type, VirtualMachineImpl vm) throws InvalidTypeException {
 		if (value == null) {
 			if (type instanceof PrimitiveType) {
 				throw new InvalidTypeException(JDIMessages.getString("ValueImpl.Type_of_the_value_not_compatible_with_the_expected_type._1")); //$NON-NLS-1$
 			}
 			return null;
 		}
 		vm.checkVM(value);
 		TypeImpl valueType= (TypeImpl)value.type();
 		if ((type instanceof PrimitiveType) ^ (valueType instanceof PrimitiveType)) {
 			throw new InvalidTypeException(JDIMessages.getString("ValueImpl.Type_of_the_value_not_compatible_with_the_expected_type._1")); //$NON-NLS-1$
 		}
 		if (type instanceof PrimitiveType) {
 			return checkPrimitiveValue((PrimitiveValueImpl) value, (PrimitiveTypeImpl) valueType, (PrimitiveTypeImpl) type);
 		}
 		return (ValueImpl)value;
 	}

 	/**
 	 * Check the type of the given value, and convert the value to the given
 	 * type if needed (see Java Language Spec, section 5.2).
 	 * @return the (converted) value.
 	 * @throws InvalidTypeException if the given value is no assignment
 	 * compatible with the given type.
 	 */
 	protected static ValueImpl checkPrimitiveValue(PrimitiveValueImpl value, PrimitiveTypeImpl valueType, PrimitiveTypeImpl type) throws InvalidTypeException {
 		char valueTypeSignature= valueType.signature().charAt(0);
 		char typeSignature= type.signature().charAt(0);
 		if (valueTypeSignature == typeSignature) {
 			return value;
 		}
 		VirtualMachineImpl vm= value.virtualMachineImpl();
 		switch (typeSignature) {
 			case 'D':
 				if (valueTypeSignature != 'Z') {
 					return new DoubleValueImpl(vm, new Double(value.doubleValue()));
 				}
 				break;
 			case 'F':
 				if (valueTypeSignature != 'Z' && valueTypeSignature != 'D') {
 					return new FloatValueImpl(vm, new Float(value.floatValue()));
 				}
 				break;
 			case 'J':
 				if (valueTypeSignature != 'Z' && valueTypeSignature != 'D' && valueTypeSignature != 'F') {
 					return new LongValueImpl(vm, new Long(value.longValue()));
 				}
 				break;
 			case 'I':
 				if (valueTypeSignature == 'B' || valueTypeSignature == 'C' || valueTypeSignature == 'S') {
 					return new IntegerValueImpl(vm, new Integer(value.intValue()));
 				}
 				break;
 			case 'S':
 				if (valueTypeSignature == 'B') {
 					return new ShortValueImpl(vm, new Short(value.shortValue()));
 				}
 				break;
 		}
 		throw new InvalidTypeException(JDIMessages.getString("ValueImpl.Type_of_the_value_not_compatible_with_the_expected_type._1")); //$NON-NLS-1$
 	}
 }
	/*******************************************************************************
	* 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 org.eclipse.jdi.internal;


	import java.io.DataInputStream;
	import java.io.DataOutputStream;
	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.jdi.internal.jdwp.JdwpID;
	import org.eclipse.jdi.internal.jdwp.JdwpObjectID;

	import com.sun.jdi.InternalException;
	import com.sun.jdi.InvalidTypeException;
	import com.sun.jdi.PrimitiveType;
	import com.sun.jdi.Type;
	import com.sun.jdi.Value;

	/**
	* this class implements the corresponding interfaces
	* declared by the JDI specification. See the com.sun.jdi package
	* for more information.
	*
	*/
	public abstract class ValueImpl extends MirrorImpl implements Value {
	/**
	* Creates new ValueImpl.
	*/
	protected ValueImpl(String description, VirtualMachineImpl vmImpl) {
	super(description, vmImpl);
	}

	/**
	* @returns type of value.
	*/
	public abstract Type type();

	/**
	* @returns type of value.
	*/
	public abstract byte getTag();

	/**
	* @return Reads JDWP representation and returns new instance.
	*/
	public static ValueImpl readWithTag(MirrorImpl target, DataInputStream in) throws IOException {
	byte tag = target.readByte("object tag", JdwpID.tagMap(), in); //$NON-NLS-1$
	return readWithoutTag(target, tag, in);
	}

	/**
	* @return Reads JDWP representation and returns new instance.
	*/
	public static ValueImpl readWithoutTag(MirrorImpl target, int type, DataInputStream in) throws IOException {
	VirtualMachineImpl vmImpl = target.virtualMachineImpl();
	// See also ArrayReference Impl.
	switch(type) {
	case ArrayReferenceImpl.tag:
	return ArrayReferenceImpl.read(target, in);
	case ClassLoaderReferenceImpl.tag:
	return ClassLoaderReferenceImpl.read(target, in);
	case ClassObjectReferenceImpl.tag:
	return ClassObjectReferenceImpl.read(target, in);
	case StringReferenceImpl.tag:
	return StringReferenceImpl.read(target, in);
	case ObjectReferenceImpl.tag:
	return ObjectReferenceImpl.readObjectRefWithoutTag(target, in);
	case ThreadGroupReferenceImpl.tag:
	return ThreadGroupReferenceImpl.read(target, in);
	case ThreadReferenceImpl.tag:
	return ThreadReferenceImpl.read(target, in);
	case BooleanValueImpl.tag:
	return BooleanValueImpl.read(target, in);
	case ByteValueImpl.tag:
	return ByteValueImpl.read(target, in);
	case CharValueImpl.tag:
	return CharValueImpl.read(target, in);
	case DoubleValueImpl.tag:
	return DoubleValueImpl.read(target, in);
	case FloatValueImpl.tag:
	return FloatValueImpl.read(target, in);
	case IntegerValueImpl.tag:
	return IntegerValueImpl.read(target, in);
	case LongValueImpl.tag:
	return LongValueImpl.read(target, in);
	case ShortValueImpl.tag:
	return ShortValueImpl.read(target, in);
	case VoidValueImpl.tag:
	return new VoidValueImpl(vmImpl);
	case 0:
	return null;
	default:
	throw new InternalException(JDIMessages.getString("ValueImpl.Invalid_Value_tag_encountered___1") + type); //$NON-NLS-1$
	}
	}

	/**
	* Writes value with value tag.
	*/
	public void writeWithTag(MirrorImpl target, DataOutputStream out) throws IOException {
	target.writeByte(getTag(), "tag", JdwpID.tagMap(), out); //$NON-NLS-1$
	write(target, out);
	}

	/**
	* Writes value without value tag.
	*/
	public abstract void write(MirrorImpl target, DataOutputStream out) throws IOException;

	/**
	* Writes null value without value tag.
	*/
	public static void writeNull(MirrorImpl target, DataOutputStream out) throws IOException {
	JdwpObjectID nullID = new JdwpObjectID(target.virtualMachineImpl());
	nullID.write(out);
	if (target.fVerboseWriter != null)
	target.fVerboseWriter.println("objectReference", nullID.value()); //$NON-NLS-1$
	}

	/**
	* Writes null value with value tag.
	*/
	public static void writeNullWithTag(MirrorImpl target, DataOutputStream out) throws IOException {
	target.writeByte(ObjectReferenceImpl.tag, "tag", JdwpID.tagMap(), out); //$NON-NLS-1$
	writeNull(target, out);
	}

	/**
	* Check the type and the vm of each values, according to the associated type.
	* For primitive values, convert the value for match the given type if needed.
	* The two list must have the same size.
	* @return the (converted) values.
	* @see checkValue(Value, Type, VirtualMachineImpl)
	*/
	protected static List checkValues(List values, List types, VirtualMachineImpl vm) throws InvalidTypeException {
	List result= new ArrayList(values.size());
	Iterator iterValues= values.iterator();
	Iterator iterTypes= types.iterator();
	while (iterValues.hasNext()) {
	Value value= (Value)iterValues.next();
	Type type= (Type)iterTypes.next();
	result.add(checkValue(value, type, vm));
	}
	return result;
	}

	/**
	* Check the type and the vm of the given value.
	* In case of primitive value, the value is converted if needed.
	* @return the (converted) value.
	* @throws InvalidTypeException if the value and the type are not both
	* primitive or not primitive or, in case of primitive, if the given
	* value is no assignment compatible with the given type.
	* @see checkPrimitiveValue(PrimitiveValueImpl, PrimitiveTypeImpl, PrimitiveTypeImpl)
	*/
	protected static ValueImpl checkValue(Value value, Type type, VirtualMachineImpl vm) throws InvalidTypeException {
	if (value == null) {
	if (type instanceof PrimitiveType) {
	throw new InvalidTypeException(JDIMessages.getString("ValueImpl.Type_of_the_value_not_compatible_with_the_expected_type._1")); //$NON-NLS-1$
	}
	return null;
	}
	vm.checkVM(value);
	TypeImpl valueType= (TypeImpl)value.type();
	if ((type instanceof PrimitiveType) ^ (valueType instanceof PrimitiveType)) {
	throw new InvalidTypeException(JDIMessages.getString("ValueImpl.Type_of_the_value_not_compatible_with_the_expected_type._1")); //$NON-NLS-1$
	}
	if (type instanceof PrimitiveType) {
	return checkPrimitiveValue((PrimitiveValueImpl) value, (PrimitiveTypeImpl) valueType, (PrimitiveTypeImpl) type);
	}
	return (ValueImpl)value;
	}

	/**
	* Check the type of the given value, and convert the value to the given
	* type if needed (see Java Language Spec, section 5.2).
	* @return the (converted) value.
	* @throws InvalidTypeException if the given value is no assignment
	* compatible with the given type.
	*/
	protected static ValueImpl checkPrimitiveValue(PrimitiveValueImpl value, PrimitiveTypeImpl valueType, PrimitiveTypeImpl type) throws InvalidTypeException {
	char valueTypeSignature= valueType.signature().charAt(0);
	char typeSignature= type.signature().charAt(0);
	if (valueTypeSignature == typeSignature) {
	return value;
	}
	VirtualMachineImpl vm= value.virtualMachineImpl();
	switch (typeSignature) {
	case 'D':
	if (valueTypeSignature != 'Z') {
	return new DoubleValueImpl(vm, new Double(value.doubleValue()));
	}
	break;
	case 'F':
	if (valueTypeSignature != 'Z' && valueTypeSignature != 'D') {
	return new FloatValueImpl(vm, new Float(value.floatValue()));
	}
	break;
	case 'J':
	if (valueTypeSignature != 'Z' && valueTypeSignature != 'D' && valueTypeSignature != 'F') {
	return new LongValueImpl(vm, new Long(value.longValue()));
	}
	break;
	case 'I':
	if (valueTypeSignature == 'B' \|\| valueTypeSignature == 'C' \|\| valueTypeSignature == 'S') {
	return new IntegerValueImpl(vm, new Integer(value.intValue()));
	}
	break;
	case 'S':
	if (valueTypeSignature == 'B') {
	return new ShortValueImpl(vm, new Short(value.shortValue()));
	}
	break;
	}
	throw new InvalidTypeException(JDIMessages.getString("ValueImpl.Type_of_the_value_not_compatible_with_the_expected_type._1")); //$NON-NLS-1$
	}
	}