bundles/org.eclipse.compare/compare/org/eclipse/compare/patch/PatchedResource.java

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
package org.eclipse.compare.patch;

import java.io.*;

import org.eclipse.compare.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.swt.graphics.Image;


/* package */ class PatchedResource implements ITypedElement, IStreamContentAccessor {
	
	Diff fDiff;
	IStreamContentAccessor fCurrent;
	String fName;
	byte[] fContent;
	
	/* package */ PatchedResource(IStreamContentAccessor current, Diff diff, String name) {
		fDiff= diff;
		fCurrent= current;
		fName= name;
	}
	
	public InputStream getContents() throws CoreException {
		if (fContent == null) {
			InputStream is= null;
			
			try {
				is= fCurrent.getContents();
			} catch (CoreException ex) {
				is= new ByteArrayInputStream(new byte[0]);
			}
			if (is != null) {
				String s= fDiff.patch(is);
				if (s != null)
					fContent= s.getBytes();
				try {
					is.close();
				} catch (IOException ex) {
				}
			}
		}
		return new ByteArrayInputStream(fContent);
	}
	
	public Image getImage() {
		return CompareUI.getImage(getType());
	}
	
	public String getName() {
		return fName;
	}
	
	public String getType() {
		int pos= fName.indexOf('.');
		if (pos >= 0)
			return fName.substring(pos+1);
//		if (fResource instanceof IContainer)
//			return ITypedElement.FOLDER_TYPE;
//		if (fResource != null) {
//			String s= fResource.getFileExtension();
//			if (s != null)
//				return s;
//		}
		return ITypedElement.UNKNOWN_TYPE;
	}

}