| package org.eclipse.cdt.internal.core.model; |
| |
| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved. |
| */ |
| |
| import java.io.File; |
| |
| import org.eclipse.cdt.core.model.ICElement; |
| import org.eclipse.core.resources.IResource; |
| |
| /** |
| * Holds cached structure and properties for a C element. |
| * Subclassed to carry properties for specific kinds of elements. |
| */ |
| class CElementInfo { |
| |
| protected CElement element; |
| |
| /** |
| * Collection of handles of immediate children of this |
| * object. This is an empty array if this element has |
| * no children. |
| */ |
| protected ICElement[] fChildren; |
| |
| /** |
| * Shared empty collection used for efficiency. |
| */ |
| protected static ICElement[] fgEmptyChildren = new ICElement[]{}; |
| |
| /** |
| * Is the structure of this element known |
| * @see ICElement.isStructureKnown() |
| */ |
| protected boolean fIsStructureKnown = false; |
| |
| protected long modificationStamp = 0; |
| |
| protected CElementInfo(CElement element) { |
| this.element = element; |
| fChildren = fgEmptyChildren; |
| } |
| |
| protected CElement getElement() { |
| return element; |
| } |
| |
| protected void addChild(ICElement child) { |
| if (fChildren == fgEmptyChildren) { |
| setChildren(new ICElement[] {child}); |
| } else { |
| if (!includesChild(child)) { |
| setChildren(growAndAddToArray(fChildren, child)); |
| } |
| } |
| } |
| |
| protected ICElement[] getChildren() { |
| return fChildren; |
| } |
| |
| /** |
| * Adds the new element to a new array that contains all of the elements of the old array. |
| * Returns the new array. |
| */ |
| protected ICElement[] growAndAddToArray(ICElement[] array, ICElement addition) { |
| ICElement[] old = array; |
| array = new ICElement[old.length + 1]; |
| System.arraycopy(old, 0, array, 0, old.length); |
| array[old.length] = addition; |
| return array; |
| } |
| |
| /** |
| * Returns <code>true</code> if this child is in my children collection |
| */ |
| protected boolean includesChild(ICElement child) { |
| |
| for (int i= 0; i < fChildren.length; i++) { |
| if (fChildren[i].equals(child)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * @see ICElement.isStructureKnown() |
| */ |
| protected boolean isStructureKnown() { |
| return fIsStructureKnown; |
| } |
| |
| /** |
| * Returns an array with all the same elements as the specified array except for |
| * the element to remove. Assumes that the deletion is contained in the array. |
| */ |
| protected ICElement[] removeAndShrinkArray(ICElement[] array, ICElement deletion) { |
| ICElement[] old = array; |
| array = new ICElement[old.length - 1]; |
| int j = 0; |
| for (int i = 0; i < old.length; i++) { |
| if (!old[i].equals(deletion)) { |
| array[j] = old[i]; |
| } else { |
| System.arraycopy(old, i + 1, array, j, old.length - (i + 1)); |
| return array; |
| } |
| j++; |
| } |
| return array; |
| } |
| |
| protected void removeChild(ICElement child) { |
| if (includesChild(child)) { |
| setChildren(removeAndShrinkArray(fChildren, child)); |
| } |
| } |
| |
| protected void removeChildren () { |
| fChildren = fgEmptyChildren; |
| } |
| |
| protected void setChildren(ICElement[] children) { |
| fChildren = children; |
| } |
| |
| protected boolean hasChildren() { |
| return fChildren.length > 0; |
| } |
| |
| protected void setChanged() { |
| modificationStamp = 0; |
| } |
| |
| protected boolean hasChanged () { |
| IResource r = null; |
| boolean b = false; |
| r = getElement().getUnderlyingResource(); |
| if (r != null && r.exists()) { |
| long modif = 0; |
| switch(r.getType()) { |
| // Adding/Removing does not count as changing, in Eclipse |
| // Ask the underlying file system |
| case IResource.FOLDER: |
| case IResource.PROJECT: |
| case IResource.ROOT: |
| File file = r.getLocation().toFile(); |
| modif = file.lastModified(); |
| break; |
| |
| case IResource.FILE: |
| modif = r.getModificationStamp(); |
| break; |
| } |
| b = (modif != modificationStamp); |
| modificationStamp = modif; |
| } |
| return b; |
| } |
| |
| /** |
| * Sets whether the structure of this element known |
| * @see ICElement.isStructureKnown() |
| */ |
| protected void setIsStructureKnown(boolean newIsStructureKnown) { |
| fIsStructureKnown = newIsStructureKnown; |
| } |
| |
| public Object clone() { |
| try { |
| return super.clone(); |
| } catch (CloneNotSupportedException e) { |
| throw new Error(); |
| } |
| } |
| } |