/*******************************************************************************
* 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.jdt.debug.core;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IValue;
/**
* An object, primitive data type, or array, on a Java virtual machine.
*
* @see org.eclipse.debug.core.model.IValue
* @noimplement This interface is not intended to be implemented by clients.
* @noextend This interface is not intended to be extended by clients.
*/
public interface IJavaValue extends IValue {
/**
* Returns the JNI-style signature for the type of this value, or
* <code>null</code> if the value is <code>null</code>.
*
* @return signature, or <code>null</code> if signature is <code>null</code>
* @exception DebugException
* if this method fails. Reasons include:
* <ul>
* <li>Failure communicating with the VM. The
* DebugException's status code contains the underlying
* exception responsible for the failure.</li>
* <li>The type associated with the signature is not yet
* loaded</li>
* </ul>
*/
public String getSignature() throws DebugException;
/**
* Returns the generic signature as defined in the JVM specification for the
* type of this value. Returns <code>null</code> if the value is
* <code>null</code>, or if the type of this value is not a generic type.
*
* @return signature, or <code>null</code> if generic signature not
* available
* @exception DebugException
* if this method fails. Reasons include:
* <ul>
* <li>Failure communicating with the VM. The
* DebugException's status code contains the underlying
* exception responsible for the failure.</li>
* <li>The type associated with the signature is not yet
* loaded</li>
* </ul>
* @since 3.1
*/
public String getGenericSignature() throws DebugException;
/**
* Returns the type of this value, or <code>null</code> if this value
* represents the <code>null</code> value
*
* @return the type of this value, or <code>null</code> if this value
* represents the <code>null</code> value
* @throws DebugException
* if the request fails
*
* @since 2.0
*/
public IJavaType getJavaType() throws DebugException;
/**
* Returns whether this value represents <code>null</code>.
*
* @return whether this value represents <code>null</code>
* @since 3.5
*/
public boolean isNull();
}