/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.core;

import java.io.File;
import java.io.IOException;

import net.sourceforge.phpdt.core.compiler.CharOperation;
import net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit;
import net.sourceforge.phpdt.internal.compiler.util.Util;

import org.eclipse.core.resources.IResource;

/**
 * A basic implementation of <code>ICompilationUnit</code>
 * for use in the <code>SourceMapper</code>.
 * @see ICompilationUnit
 */
public class BasicCompilationUnit implements ICompilationUnit {
  protected char[] contents;
  protected char[] fileName;
  protected char[][] packageName;
  protected char[] mainTypeName;
  protected String encoding;

  public BasicCompilationUnit(char[] contents, char[][] packageName, String fileName, String encoding) {
    this.contents = contents;
    this.fileName = fileName.toCharArray();
    this.packageName = packageName;

    int start = fileName.lastIndexOf("/") + 1; //$NON-NLS-1$
    if (start == 0 || start < fileName.lastIndexOf("\\")) //$NON-NLS-1$
      start = fileName.lastIndexOf("\\") + 1; //$NON-NLS-1$

    int end = fileName.lastIndexOf("."); //$NON-NLS-1$
    if (end == -1)
      end = fileName.length();

    this.mainTypeName = fileName.substring(start, end).toCharArray();
    this.encoding = encoding;
  }
  public char[] getContents() {
    if (this.contents != null)
      return this.contents; // answer the cached source

    // otherwise retrieve it
    try {
      return Util.getFileCharContent(new File(new String(fileName)), this.encoding);
    } catch (IOException e) {
    }
    return CharOperation.NO_CHAR;
  }
  public char[] getFileName() {
    return this.fileName;
  }
  public char[] getMainTypeName() {
    return this.mainTypeName;
  }
  public char[][] getPackageName() {
    return this.packageName;
  }
  public String toString() {
    return "CompilationUnit: " + new String(fileName); //$NON-NLS-1$
  }
  

}