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1
11 package org.eclipse.debug.internal.core.commands;
12
13 import java.util.HashSet  ;
14 import java.util.Set ;
15
16 import org.eclipse.core.runtime.CoreException;
17 import org.eclipse.core.runtime.IAdaptable;
18 import org.eclipse.core.runtime.IProgressMonitor;
19 import org.eclipse.debug.core.IRequest;
20 import org.eclipse.debug.core.commands.IEnabledStateRequest;
21 import org.eclipse.debug.core.model.IStackFrame;
22 import org.eclipse.debug.core.model.IStep;
23
24
29 public abstract class StepCommand extends DebugCommand {
30
31 protected void doExecute(Object [] targets, IProgressMonitor monitor, IRequest request) throws CoreException {
32 for (int i = 0; i < targets.length; i++) {
33 step(targets[i]);
34 }
35 }
36
37 protected abstract void step(Object target) throws CoreException ;
38
39 protected boolean isExecutable(Object [] targets, IProgressMonitor monitor, IEnabledStateRequest collector) throws CoreException {
40 if (isThreadCompatible(targets)) {
41 for (int i = 0; i < targets.length; i++) {
42 if (!isSteppable(targets[i])) {
43 return false;
44 }
45 }
46 return true;
47 } else {
48 return false;
49 }
50 }
51
52 protected abstract boolean isSteppable(Object target) throws CoreException;
53
54 protected boolean isThreadCompatible(Object [] targets) {
55 if (targets.length == 1) {
56 return true;
57 }
58 Set threads = new HashSet (targets.length);
60 for (int i = 0; i < targets.length; i++) {
61 Object object = targets[i];
62 IStackFrame frame = null;
63 if (object instanceof IStackFrame) {
64 frame = (IStackFrame) object;
65 } else if (object instanceof IAdaptable) {
66 frame = (IStackFrame)((IAdaptable)object).getAdapter(IStackFrame.class);
67 }
68 if (frame != null) {
69 if (!threads.add(frame.getThread())) {
70 return false;
71 }
72 }
73 }
74 return true;
75 }
76
77 protected Object getTarget(Object element) {
78 if (element instanceof IStep) {
79 return element;
80 } else if (element instanceof IAdaptable) {
81 return ((IAdaptable) element).getAdapter(IStep.class);
82 }
83 return null;
84 }
85
86 }
87 |
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