/* | |
* (c) Copyright IBM Corp. 2000, 2001. | |
* All Rights Reserved. | |
*/ | |
package org.eclipse.compare.structuremergeviewer; | |
import org.eclipse.swt.graphics.Image; | |
import org.eclipse.compare.ITypedElement; | |
import org.eclipse.jface.util.Assert; | |
/** | |
* An abstract base implementation of the <code>IDiffElement</code> interface. | |
* <p> | |
* Subclasses may add behavior and state, and may override <code>getImage</code> | |
* and <code>getType</code> to suit. | |
* </p> | |
*/ | |
public abstract class DiffElement implements IDiffElement { | |
private int fKind; | |
private IDiffContainer fParent; | |
/** | |
* Creates a new <code>DiffElement</code> as a child of the given parent. | |
* If parent is not <code>null</code> the new element is added to the parent. | |
* | |
* @param parent the parent of this child; if not <code>null</code> this element is automatically added as a child | |
* @param kind the kind of change | |
*/ | |
public DiffElement(IDiffContainer parent, int kind) { | |
fParent= parent; | |
fKind= kind; | |
if (parent != null) | |
parent.add(this); | |
} | |
/** | |
* The <code>DiffElement</code> implementation of this <code>ITypedInput</code> | |
* method returns <code>null</code>. Subclasses may re-implement to provide | |
* an image for this element. | |
*/ | |
public Image getImage() { | |
return null; | |
} | |
/** | |
* The <code>DiffElement</code> implementation of this <code>ITypedElement</code> | |
* method returns <code>ITypedElement.UNKNOWN_TYPE</code>. Subclasses may | |
* re-implement to provide a type for this element. | |
*/ | |
public String getType() { | |
return ITypedElement.UNKNOWN_TYPE; | |
} | |
/** | |
* Sets the kind of difference for this element. | |
* | |
* @param kind set the kind of difference this element represents | |
* @see Differencer | |
*/ | |
public void setKind(int kind) { | |
fKind= kind; | |
} | |
/* (non Javadoc) | |
* see IDiffElement.getKind | |
*/ | |
public int getKind() { | |
return fKind; | |
} | |
/* (non Javadoc) | |
* see IDiffElement.getParent | |
*/ | |
public IDiffContainer getParent() { | |
return fParent; | |
} | |
/* (non Javadoc) | |
* see IDiffElement.setParent | |
*/ | |
public void setParent(IDiffContainer parent) { | |
fParent= parent; | |
} | |
} | |