Copyright (c) 2006, 2017 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) 2006, 2017 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.InputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;

import org.eclipse.jdt.internal.compiler.env.AccessRuleSet;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.util.Util;

public class ClasspathSourceJar extends ClasspathJar {
	private String encoding;

	public ClasspathSourceJar(File file, boolean closeZipFileAtEnd,
			AccessRuleSet accessRuleSet, String encoding,
			String destinationPath) {
		super(file, closeZipFileAtEnd, accessRuleSet, destinationPath);
		this.encoding = encoding;
	}

	@Override
	public NameEnvironmentAnswer findClass(char[] typeName, String qualifiedPackageName, String moduleName, String qualifiedBinaryFileName, boolean asBinaryOnly) {
		if (!isPackage(qualifiedPackageName, moduleName))
			return null; // most common case

		ZipEntry sourceEntry = this.zipFile.getEntry(qualifiedBinaryFileName.substring(0, qualifiedBinaryFileName.length() - 6)  + SUFFIX_STRING_java);
		if (sourceEntry != null) {
			try {
				InputStream stream = null;
				char[] contents = null; 
				try {
					stream = this.zipFile.getInputStream(sourceEntry);
					contents = Util.getInputStreamAsCharArray(stream, -1, this.encoding);
				} finally {
					if (stream != null)
						stream.close();
				}
				CompilationUnit compilationUnit = new CompilationUnit(
					contents,
					qualifiedBinaryFileName.substring(0, qualifiedBinaryFileName.length() - 6) + SUFFIX_STRING_java,
					this.encoding,
					this.destinationPath);
				compilationUnit.module = this.module == null ? null : this.module.name();
				return new NameEnvironmentAnswer(
					compilationUnit,
					fetchAccessRestriction(qualifiedBinaryFileName));
			} catch (IOException e) {
				// treat as if source file is missing
			}
		}
		return null;
	}

	@Override
	public int getMode() {
		return SOURCE;
	}
}