/*******************************************************************************
* Copyright (c) 2000, 2012 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.jdt.internal.debug.eval.ast.instructions;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jdt.core.Signature;
import org.eclipse.jdt.debug.core.IJavaObject;
import org.eclipse.jdt.debug.core.IJavaPrimitiveValue;
import org.eclipse.jdt.debug.core.IJavaValue;
import org.eclipse.jdt.internal.debug.core.JDIDebugPlugin;
import org.eclipse.jdt.internal.debug.core.model.JDINullValue;
import org.eclipse.osgi.util.NLS;
public class Cast extends CompoundInstruction {
public static final String IS_INSTANCE = "isInstance"; //$NON-NLS-1$
public static final String IS_INSTANCE_SIGNATURE = "(Ljava/lang/Object;)Z"; //$NON-NLS-1$
private int fTypeTypeId;
private String fBaseTypeName;
private int fDimension;
/**
* Cast instruction constructor.
*
* @param typeTypeId
* the id of the type to cast into.
* @param baseTypeName
* the base type name of the type (the type name if the type is
* not an array type.
* @param dimension
* the dimension of the array type, 0 if the type is not an array
* type.
*/
public Cast(int typeTypeId, String baseTypeName, int dimension, int start) {
super(start);
fTypeTypeId = typeTypeId;
fBaseTypeName = baseTypeName;
fDimension = dimension;
}
/*
* @see Instruction#execute()
*/
@Override
public void execute() throws CoreException {
IJavaValue value = popValue();
if (value instanceof IJavaPrimitiveValue) {
IJavaPrimitiveValue primitiveValue = (IJavaPrimitiveValue) value;
switch (fTypeTypeId) {
case T_double:
push(newValue(primitiveValue.getDoubleValue()));
break;
case T_float:
push(newValue(primitiveValue.getFloatValue()));
break;
case T_long:
push(newValue(primitiveValue.getLongValue()));
break;
case T_int:
push(newValue(primitiveValue.getIntValue()));
break;
case T_short:
push(newValue(primitiveValue.getShortValue()));
break;
case T_byte:
push(newValue(primitiveValue.getByteValue()));
break;
case T_char:
push(newValue(primitiveValue.getCharValue()));
break;
}
} else if (value instanceof JDINullValue) {
// null value can be cast to all non-primitive types (bug 31637).
push(value);
} else {
IJavaObject classObject;
if (fDimension == 0) {
classObject = getClassObject(getType(fBaseTypeName));
} else {
classObject = getClassObject(getArrayType(
Signature.createTypeSignature(fBaseTypeName, true),
fDimension));
}
if (classObject == null) {
throw new CoreException(
new Status(
IStatus.ERROR,
JDIDebugPlugin.getUniqueIdentifier(),
IStatus.OK,
NLS.bind(InstructionsEvaluationMessages.Cast_No_class_object,
new String[] { typeName() }),
null));
}
IJavaPrimitiveValue resultValue = (IJavaPrimitiveValue) classObject
.sendMessage(IS_INSTANCE, IS_INSTANCE_SIGNATURE,
new IJavaValue[] { value }, getContext()
.getThread(), false);
if (!resultValue.getBooleanValue()) {
throw new CoreException(
new Status(
IStatus.ERROR,
JDIDebugPlugin.getUniqueIdentifier(),
IStatus.OK,
NLS.bind(InstructionsEvaluationMessages.Cast_ClassCastException__Cannot_cast__0__as__1___1,
new String[] {
value.toString(),
typeName() }), null));
}
push(value);
}
}
private String typeName() {
String result = fBaseTypeName;
for (int i = 0; i < fDimension; i++) {
result += "[]"; //$NON-NLS-1$
}
return result;
}
/*
* @see Object#toString()
*/
@Override
public String toString() {
return InstructionsEvaluationMessages.Cast_cast_3;
}
}