Copyright (c) 2000, 2018 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2018 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.batch;

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

import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.env.ICompilationUnit;
import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment;
import org.eclipse.jdt.internal.compiler.lookup.ModuleBinding;
import org.eclipse.jdt.internal.compiler.problem.AbortCompilationUnit;
import org.eclipse.jdt.internal.compiler.util.Util;

public class CompilationUnit implements ICompilationUnit {
	public char[] contents;
	public char[] fileName;
	public char[] mainTypeName;
	String encoding;
	public String destinationPath;
	public char[] module;
		// a specific destination path for this compilation unit; coding is
		// aligned with Main.destinationPath:
		// == null: unspecified, use whatever value is set by the enclosing
		//          context, id est Main;
		// == Main.NONE: absorbent element, do not output class files;
		// else: use as the path of the directory into which class files must
		//       be written.
	private boolean ignoreOptionalProblems;
	private ModuleBinding moduleBinding;

public CompilationUnit(char[] contents, String fileName, String encoding) {
	this(contents, fileName, encoding, null);
}
public CompilationUnit(char[] contents, String fileName, String encoding,
		String destinationPath) {
	this(contents, fileName, encoding, destinationPath, false, null);
}
public CompilationUnit(char[] contents, String fileName, String encoding,
		String destinationPath, boolean ignoreOptionalProblems, String modName) {
	this.contents = contents;
	if (modName != null)
		this.module = modName.toCharArray();
	char[] fileNameCharArray = fileName.toCharArray();
	switch(File.separatorChar) {
		case '/' :
			if (CharOperation.indexOf('\\', fileNameCharArray) != -1) {
				CharOperation.replace(fileNameCharArray, '\\', '/');
			}
			break;
		case '\\' :
			if (CharOperation.indexOf('/', fileNameCharArray) != -1) {
				CharOperation.replace(fileNameCharArray, '/', '\\');
			}
	}
	this.fileName = fileNameCharArray;
	int start = CharOperation.lastIndexOf(File.separatorChar, fileNameCharArray) + 1;

	int end = CharOperation.lastIndexOf('.', fileNameCharArray);
	if (end == -1) {
		end = fileNameCharArray.length;
	}

	this.mainTypeName = CharOperation.subarray(fileNameCharArray, start, end);
	this.encoding = encoding;
	this.destinationPath = destinationPath;
	this.ignoreOptionalProblems = ignoreOptionalProblems;
}
@Override
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(this.fileName)), this.encoding);
	} catch (IOException e) {
		this.contents = CharOperation.NO_CHAR; // assume no source if asked again
		throw new AbortCompilationUnit(null, e, this.encoding);
	}
}
See Also:
getFileName.getFileName()/**
 * @see org.eclipse.jdt.internal.compiler.env.IDependent#getFileName()
 */
@Override
public char[] getFileName() {
	return this.fileName;
}
@Override
public char[] getMainTypeName() {
	return this.mainTypeName;
}
@Override
public char[][] getPackageName() {
	return null;
}
@Override
public boolean ignoreOptionalProblems() {
	return this.ignoreOptionalProblems;
}
@Override
public String toString() {
	return "CompilationUnit[" + new String(this.fileName) + "]";  //$NON-NLS-2$ //$NON-NLS-1$
}
@Override
public char[] getModuleName() {
	return this.module;
}
@Override
public ModuleBinding module(LookupEnvironment rootEnvironment) {
	if (this.moduleBinding != null)
		return this.moduleBinding;
	this.moduleBinding = rootEnvironment.getModule(this.module);
	if (this.moduleBinding == null)
		throw new IllegalStateException("Module should be known"); //$NON-NLS-1$
	return this.moduleBinding;
}
@Override
public String getDestinationPath() {
	return this.destinationPath;
}
}