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Lines 224-244
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*/ |
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*/ |
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public ICommand reduce() { |
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public ICommand reduce() { |
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switch (size()) { |
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switch (size()) { |
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case 1: |
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case 0: |
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IUndoableOperation child = (IUndoableOperation) iterator() |
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return this; |
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case 1: |
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IUndoableOperation child = (IUndoableOperation) iterator() |
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.next(); |
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.next(); |
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if (child instanceof ICommand |
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if (child instanceof ICommand && |
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&& (child instanceof CompositeEMFOperation || child instanceof AbstractEMFOperation)) { |
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child instanceof AbstractEMFOperation) { |
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// return the single command if is a kind of EMF operation; |
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// return the single command if is a kind of EMF operation; |
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// otherwise this composite will be returned to preserve the |
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// otherwise this composite will be returned to preserve the |
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// EMF transaction behaviour. |
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// EMF transaction behaviour. |
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return ((ICommand) child).reduce(); |
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return ((ICommand) child).reduce(); |
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} |
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default: |
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if (!isTransactionNestingEnabled()) { |
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List children = getChildren(); |
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IUndoableOperation[] opChildren = (IUndoableOperation[]) children |
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.toArray(new IUndoableOperation[children.size()]); |
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children.clear(); |
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for (int i = 0; i < opChildren.length; ++i) { |
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doReduce(opChildren[i], children); |
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} |
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} |
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} |
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} |
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} |
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return this; |
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return this; |
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} |
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} |
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private void doReduce(IUndoableOperation operation, List children) { |
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if (operation instanceof CompositeEMFOperation) { |
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for (Iterator i = ((CompositeEMFOperation) operation).iterator(); i.hasNext();) { |
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doReduce((IUndoableOperation) i.next(), children); |
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} |
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} else { |
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children.add(operation); |
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} |
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} |
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/** |
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/** |
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* Answers whether or not this composite operation has children. |
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* Answers whether or not this composite operation has children. |
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* |
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* |
