| package org.eclipse.cdt.internal.core.model; |
| |
| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved. |
| */ |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.cdt.core.model.ICElement; |
| import org.eclipse.cdt.core.model.ICElementDelta; |
| import org.eclipse.cdt.core.model.ICModelStatus; |
| import org.eclipse.cdt.core.model.ICModelStatusConstants; |
| import org.eclipse.cdt.core.model.CModelException; |
| |
| /** |
| * This class is used to perform operations on multiple <code>ICElement</code>. |
| * It is responible for running each operation in turn, collecting |
| * the errors and merging the corresponding <code>CElementDelta</code>s. |
| * <p> |
| * If several errors occured, they are collected in a multi-status |
| * <code>CModelStatus</code>. Otherwise, a simple <code>CModelStatus</code> |
| * is thrown. |
| */ |
| public abstract class MultiOperation extends CModelOperation { |
| /** |
| * The list of renamings supplied to the operation |
| */ |
| protected String[] fRenamingsList= null; |
| |
| /** |
| * Table specifying the new parent for elements being |
| * copied/moved/renamed. |
| * Keyed by elements being processed, and |
| * values are the corresponding destination parent. |
| */ |
| protected Map fParentElements; |
| |
| /** |
| * Table specifying insertion positions for elements being |
| * copied/moved/renamed. Keyed by elements being processed, and |
| * values are the corresponding insertion point. |
| * @see processElements(IProgressMonitor) |
| */ |
| protected Map fInsertBeforeElements= new HashMap(1); |
| |
| /** |
| * This table presents the data in <code>fRenamingList</code> in a more |
| * convenient way. |
| */ |
| protected Map fRenamings; |
| |
| /** |
| * Creates a new <code>MultiOperation</code>. |
| */ |
| protected MultiOperation(ICElement[] elementsToProcess, ICElement[] parentElements, boolean force) { |
| super(elementsToProcess, parentElements, force); |
| fParentElements = new HashMap(elementsToProcess.length); |
| if (elementsToProcess.length == parentElements.length) { |
| for (int i = 0; i < elementsToProcess.length; i++) { |
| fParentElements.put(elementsToProcess[i], parentElements[i]); |
| } |
| } else { //same destination for all elements to be moved/copied/renamed |
| for (int i = 0; i < elementsToProcess.length; i++) { |
| fParentElements.put(elementsToProcess[i], parentElements[0]); |
| } |
| } |
| } |
| |
| /** |
| * Creates a new <code>MultiOperation</code> on <code>elementsToProcess</code>. |
| */ |
| protected MultiOperation(ICElement[] elementsToProcess, boolean force) { |
| super(elementsToProcess, force); |
| } |
| |
| /** |
| * Convenience method to create a <code>CModelException</code> |
| * embending a <code>CModelStatus</code>. |
| */ |
| protected void error(int code, ICElement element) throws CModelException { |
| throw new CModelException(new CModelStatus(code, element)); |
| } |
| |
| /** |
| * Executes the operation. |
| * |
| * @exception CModelException if one or several errors occured during the operation. |
| * If multiple errors occured, the corresponding <code>CModelStatus</code> is a |
| * multi-status. Otherwise, it is a simple one. |
| */ |
| protected void executeOperation() throws CModelException { |
| try { |
| processElements(); |
| } catch (CModelException cme) { |
| throw cme; |
| } finally { |
| mergeDeltas(); |
| } |
| } |
| |
| /** |
| * Returns the parent of the element being copied/moved/renamed. |
| */ |
| protected ICElement getDestinationParent(ICElement child) { |
| return (ICElement)fParentElements.get(child); |
| } |
| |
| /** |
| * Returns the name to be used by the progress monitor. |
| */ |
| protected abstract String getMainTaskName(); |
| |
| /** |
| * Returns the new name for <code>element</code>, or <code>null</code> |
| * if there are no renamings specified. |
| */ |
| protected String getNewNameFor(ICElement element) { |
| if (fRenamings != null) |
| return (String) fRenamings.get(element); |
| else |
| return null; |
| } |
| |
| /** |
| * Sets up the renamings hashtable - keys are the elements and |
| * values are the new name. |
| */ |
| private void initializeRenamings() { |
| if (fRenamingsList != null && fRenamingsList.length == fElementsToProcess.length) { |
| fRenamings = new HashMap(fRenamingsList.length); |
| for (int i = 0; i < fRenamingsList.length; i++) { |
| if (fRenamingsList[i] != null) { |
| fRenamings.put(fElementsToProcess[i], fRenamingsList[i]); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns <code>true</code> if this operation represents a move or rename, <code>false</code> |
| * if this operation represents a copy.<br> |
| * Note: a rename is just a move within the same parent with a name change. |
| */ |
| protected boolean isMove() { |
| return false; |
| } |
| |
| /** |
| * Returns <code>true</code> if this operation represents a rename, <code>false</code> |
| * if this operation represents a copy or move. |
| */ |
| protected boolean isRename() { |
| return false; |
| } |
| |
| /** |
| * Process all of the changed deltas generated by these operations. |
| */ |
| protected void mergeDeltas() { |
| if (fDeltas != null) { |
| CElementDelta rootDelta = newCElementDelta(); |
| boolean insertedTree = false; |
| for (int i = 0; i < fDeltas.length; i++) { |
| ICElementDelta delta = fDeltas[i]; |
| ICElementDelta[] children = delta.getAffectedChildren(); |
| for (int j = 0; j < children.length; j++) { |
| CElementDelta projectDelta = (CElementDelta) children[j]; |
| rootDelta.insertDeltaTree(projectDelta.getElement(), projectDelta); |
| insertedTree = true; |
| } |
| } |
| if (insertedTree) |
| fDeltas = new ICElementDelta[] {rootDelta}; |
| else |
| fDeltas = null; |
| } |
| } |
| |
| /** |
| * Subclasses must implement this method to process a given <code>ICElement</code>. |
| */ |
| protected abstract void processElement(ICElement element) throws CModelException; |
| |
| /** |
| * Processes all the <code>ICElement</code>s in turn, collecting errors |
| * and updating the progress monitor. |
| * |
| * @exception CModelException if one or several operation(s) was unable to |
| * be completed. |
| */ |
| protected void processElements() throws CModelException { |
| beginTask(getMainTaskName(), fElementsToProcess.length); |
| ICModelStatus[] errors = new ICModelStatus[3]; |
| int errorsCounter = 0; |
| for (int i = 0; i < fElementsToProcess.length; i++) { |
| try { |
| verify(fElementsToProcess[i]); |
| processElement(fElementsToProcess[i]); |
| } catch (CModelException jme) { |
| if (errorsCounter == errors.length) { |
| // resize |
| System.arraycopy(errors, 0, (errors = new ICModelStatus[errorsCounter*2]), 0, errorsCounter); |
| } |
| errors[errorsCounter++] = jme.getCModelStatus(); |
| } finally { |
| worked(1); |
| } |
| } |
| done(); |
| if (errorsCounter == 1) { |
| throw new CModelException(errors[0]); |
| } else if (errorsCounter > 1) { |
| if (errorsCounter != errors.length) { |
| // resize |
| System.arraycopy(errors, 0, (errors = new ICModelStatus[errorsCounter]), 0, errorsCounter); |
| } |
| throw new CModelException(CModelStatus.newMultiStatus(errors)); |
| } |
| } |
| |
| /** |
| * Sets the insertion position in the new container for the modified element. The element |
| * being modified will be inserted before the specified new sibling. The given sibling |
| * must be a child of the destination container specified for the modified element. |
| * The default is <code>null</code>, which indicates that the element is to be |
| * inserted at the end of the container. |
| */ |
| public void setInsertBefore(ICElement modifiedElement, ICElement newSibling) { |
| fInsertBeforeElements.put(modifiedElement, newSibling); |
| } |
| |
| /** |
| * Sets the new names to use for each element being copied. The renamings |
| * correspond to the elements being processed, and the number of |
| * renamings must match the number of elements being processed. |
| * A <code>null</code> entry in the list indicates that an element |
| * is not to be renamed. |
| * |
| * <p>Note that some renamings may not be used. If both a parent |
| * and a child have been selected for copy/move, only the parent |
| * is changed. Therefore, if a new name is specified for the child, |
| * the child's name will not be changed. |
| */ |
| public void setRenamings(String[] renamings) { |
| fRenamingsList = renamings; |
| initializeRenamings(); |
| } |
| |
| /** |
| * This method is called for each <code>ICElement</code> before |
| * <code>processElement</code>. It should check that this <code>element</code> |
| * can be processed. |
| */ |
| protected abstract void verify(ICElement element) throws CModelException; |
| |
| /** |
| * Verifies that the <code>destination</code> specified for the <code>element</code> is valid for the types of the |
| * <code>element</code> and <code>destination</code>. |
| */ |
| protected void verifyDestination(ICElement element, ICElement destination) throws CModelException { |
| if (destination == null || !destination.exists()) |
| error(ICModelStatusConstants.ELEMENT_DOES_NOT_EXIST, destination); |
| |
| } |
| |
| /** |
| * Verify that the new name specified for <code>element</code> is |
| * valid for that type of C element. |
| */ |
| protected void verifyRenaming(ICElement element) throws CModelException { |
| String newName = getNewNameFor(element); |
| boolean isValid = true; |
| // Validate the name here. |
| if (newName.indexOf(' ') != -1) { |
| isValid = false; |
| } |
| |
| if (!isValid) { |
| throw new CModelException(new CModelStatus(ICModelStatusConstants.INVALID_NAME, element, newName)); |
| } |
| } |
| |
| /** |
| * Verifies that the positioning sibling specified for the <code>element</code> is exists and |
| * its parent is the destination container of this <code>element</code>. |
| */ |
| protected void verifySibling(ICElement element, ICElement destination) throws CModelException { |
| ICElement insertBeforeElement = (ICElement) fInsertBeforeElements.get(element); |
| if (insertBeforeElement != null) { |
| if (!insertBeforeElement.exists() || !insertBeforeElement.getParent().equals(destination)) { |
| error(ICModelStatusConstants.INVALID_SIBLING, insertBeforeElement); |
| } |
| } |
| } |
| } |