| /******************************************************************************* |
| * Copyright (c) 2010 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.wst.jsdt.debug.internal.crossfire.jsdi; |
| |
| import org.eclipse.wst.jsdt.debug.core.jsdi.NullValue; |
| import org.eclipse.wst.jsdt.debug.core.jsdi.Property; |
| import org.eclipse.wst.jsdt.debug.core.jsdi.Value; |
| |
| /** |
| * Default implementation of {@link Property} for Crossfire |
| * |
| * @since 1.0 |
| */ |
| public class CFProperty extends CFMirror implements Property { |
| |
| private String name = null; |
| private Number ref = null; |
| private CFStackFrame frame = null; |
| private Value value = null; |
| |
| /** |
| * Constructor |
| * |
| * @param vm |
| * @param frame |
| * @param name |
| * @param ref |
| */ |
| public CFProperty(CFVirtualMachine vm, CFStackFrame frame, String name, Number ref) { |
| super(vm); |
| this.frame = frame; |
| this.name = name; |
| this.ref = ref; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.wst.jsdt.debug.core.jsdi.Property#name() |
| */ |
| public String name() { |
| return this.name; |
| } |
| |
| /** |
| * Allows the value to be set. Passing in <code>null</code> for <code>newvalue</code> will result |
| * in {@link #value} being set to {@link NullValue} |
| * |
| * @param newvalue |
| */ |
| protected void setValue(Value newvalue) { |
| if(newvalue == null) { |
| this.value = crossfire().mirrorOfNull(); |
| } |
| else { |
| this.value = newvalue; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.wst.jsdt.debug.core.jsdi.Property#value() |
| */ |
| public synchronized Value value() { |
| if(this.value == null) { |
| this.value = frame.lookup(this.ref); |
| if(this.value == null) { |
| this.value = crossfire().mirrorOfUndefined(); |
| } |
| } |
| if(this.value == null) { |
| return crossfire().mirrorOfUndefined(); |
| } |
| return this.value; |
| } |
| } |