| /******************************************************************************* |
| * Copyright (c) 2007, 2012 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.debug.ui.variables; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.debug.core.DebugException; |
| import org.eclipse.debug.core.model.IExpression; |
| import org.eclipse.debug.core.model.IValue; |
| import org.eclipse.debug.core.model.IVariable; |
| import org.eclipse.debug.internal.ui.model.elements.VariableContentProvider; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate; |
| import org.eclipse.jdt.debug.core.IJavaObject; |
| import org.eclipse.jdt.debug.core.IJavaThread; |
| import org.eclipse.jdt.debug.core.IJavaVariable; |
| import org.eclipse.jdt.internal.debug.core.HeapWalkingManager; |
| import org.eclipse.jdt.internal.debug.core.model.JDIDebugModelMessages; |
| import org.eclipse.jdt.internal.debug.core.model.JDIReferenceListVariable; |
| import org.eclipse.osgi.util.NLS; |
| |
| /** |
| * Determines the child content of an IJavaVariable. |
| * |
| * @since 3.3 |
| * @see VariableContentProvider |
| * @see IJavaVariable |
| * @see JavaVariableAdapterFactory |
| * @see JavaExpressionContentProvider |
| */ |
| public class JavaVariableContentProvider extends VariableContentProvider { |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.model.elements.VariableContentProvider#getChildren(java.lang.Object, int, int, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext, org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate) |
| */ |
| @Override |
| protected Object[] getChildren(Object parent, int index, int length, IPresentationContext context, IViewerUpdate monitor) throws CoreException { |
| try { |
| Object[] variables = getAllChildren(parent, context); |
| if (displayReferencesAsChild(parent)){ |
| Object[] moreVariables = new Object[variables.length+1]; |
| System.arraycopy(variables, 0, moreVariables, 1, variables.length); |
| IValue value = ((IVariable)parent).getValue(); |
| moreVariables[0] = new JDIReferenceListVariable(NLS.bind(JDIDebugModelMessages.JDIReferenceListValue_6, new String[]{((IVariable)parent).getName()}),(IJavaObject)value); |
| return getElements(moreVariables, index, length); |
| } |
| return getElements(variables, index, length); |
| } catch (CoreException e) { |
| if (e.getStatus().getCode() == IJavaThread.ERR_THREAD_NOT_SUSPENDED) { |
| monitor.cancel(); |
| return EMPTY; |
| } |
| throw e; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.model.elements.VariableContentProvider#getChildCount(java.lang.Object, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext, org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate) |
| */ |
| @Override |
| protected int getChildCount(Object element, IPresentationContext context, IViewerUpdate monitor) throws CoreException { |
| try { |
| int count = super.getChildCount(element, context, monitor); |
| if (displayReferencesAsChild(element)){ |
| count++; |
| } |
| return count; |
| } catch (CoreException e) { |
| if (e.getStatus().getCode() == IJavaThread.ERR_THREAD_NOT_SUSPENDED) { |
| monitor.cancel(); |
| return 0; |
| } |
| throw e; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.model.elements.VariableContentProvider#hasChildren(java.lang.Object, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext, org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate) |
| */ |
| @Override |
| protected boolean hasChildren(Object element, IPresentationContext context, IViewerUpdate monitor) throws CoreException { |
| try { |
| if (displayReferencesAsChild(element)){ |
| return true; |
| } |
| return super.hasChildren(element, context, monitor); |
| } catch (CoreException e) { |
| if (e.getStatus().getCode() == IJavaThread.ERR_THREAD_NOT_SUSPENDED) { |
| monitor.cancel(); |
| return false; |
| } |
| throw e; |
| } |
| } |
| |
| /** |
| * Determines if an all references variable should be added as a child to the passed object. |
| * |
| * @param parent element to display references as a child for |
| * @return whether to display references as a child of the given parent |
| * @throws DebugException |
| */ |
| public static boolean displayReferencesAsChild(Object parent) throws DebugException{ |
| // Note, this method is used by the JavaExpressionContentProvider as well as the JavaVariableContentProvider |
| // Only display references if the target can support it |
| if (HeapWalkingManager.supportsHeapWalking(parent)){ |
| // Lists of references don't have references |
| if (!(parent instanceof JDIReferenceListVariable)){ |
| IValue value = null; |
| if (parent instanceof IVariable){ |
| value = ((IVariable)parent).getValue(); |
| } else if (parent instanceof IExpression){ |
| value = ((IExpression)parent).getValue(); |
| } else{ |
| return false; |
| } |
| // Only java objects have references |
| if (value instanceof IJavaObject){ |
| // Null objects don't have references |
| if (!((IJavaObject)value).isNull()){ |
| return HeapWalkingManager.getDefault().isShowReferenceInVarView(); |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.model.elements.VariableContentProvider#getAllChildren(java.lang.Object, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext) |
| */ |
| @Override |
| protected Object[] getAllChildren(Object parent, IPresentationContext context) throws CoreException { |
| Object[] children = super.getAllChildren(parent, context); |
| return JavaContentProviderFilter.filterVariables(children, context); |
| } |
| } |