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/*******************************************************************************
* Copyright (c) 2000, 2006 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.model;
import java.io.File;
import java.util.List;
import java.util.Vector;
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 {
/**
* Shared empty collection used for efficiency.
*/
static Object[] NO_NON_C_RESOURCES = new Object[] {};
protected CElement element;
/**
* Collection of handles of immediate children of this
* object. This is an empty array if this element has
* no children.
*/
private List fChildren;
/**
* 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;
// Array list starts with size = 0
fChildren = new Vector(0);
}
protected CElement getElement() {
return element;
}
protected void addChild(ICElement child) {
// Do not add a check if the child is contained here
// because it causes a performance bottle neck for large files.
fChildren.add(child);
}
protected ICElement[] getChildren() {
synchronized (fChildren) {
ICElement[] array= new ICElement[fChildren.size()];
return (ICElement[]) fChildren.toArray( array );
}
}
/**
* Returns <code>true</code> if this child is in my children collection
*/
protected boolean includesChild(ICElement child) {
if(fChildren.contains(child))
return true;
return false;
}
/**
* @see ICElement.isStructureKnown()
*/
protected boolean isStructureKnown() {
return fIsStructureKnown;
}
protected void removeChild(ICElement child) {
fChildren.remove(child);
}
protected void removeChildren () {
fChildren.clear();
}
protected void setChildren(List children) {
fChildren.addAll(children);
}
protected boolean hasChildren() {
return fChildren.size() > 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();
}
}
}
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