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/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.xml.rpc.util;

import java.io.OutputStream;
import java.io.PrintWriter;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import com.sun.xml.rpc.util.localization.Localizable;

/**
 * A helper class to invoke javac.
 *
 * @author JAX-RPC Development Team
 */
public class JavaCompilerHelper extends ToolBase {

	public JavaCompilerHelper(OutputStream out) {
		super(out, " ");
		this.out = out;
	}

	public boolean compile(String[] args) {
		return internalCompile(args);
	}

	protected String getResourceBundleName() {
		return "com.sun.xml.rpc.resources.javacompiler";
	}

	protected boolean internalCompile(String[] args) {
		ClassLoader cl = Thread.currentThread().getContextClassLoader();
		Class comSunToolsJavacMainClass = null;
		try {
			/* try to use the new compiler */
			comSunToolsJavacMainClass =
				cl.loadClass("com.sun.tools.javac.Main");
			try {
				Method compileMethod =
					comSunToolsJavacMainClass.getMethod(
						"compile",
						compile141MethodSignature);
				try {
					Object result =
						compileMethod.invoke(
							null,
							new Object[] { args, new PrintWriter(out)});
					if (!(result instanceof Integer)) {
						return false;
					}
					return ((Integer) result).intValue() == 0;
				} catch (IllegalAccessException e3) {
					return false;
				} catch (IllegalArgumentException e3) {
					return false;
				} catch (InvocationTargetException e3) {
					return false;
				}
			} catch (NoSuchMethodException e2) {
				//tryout 1.3.1 signature
				return internalCompilePre141(args);
				//onError(getMessage("javacompiler.nosuchmethod.error", "getMethod(\"compile\", compile141MethodSignature)"));
				//return false;
			}
		} catch (ClassNotFoundException e) {
			onError(
				getMessage(
					"javacompiler.classpath.error",
					"com.sun.tools.javac.Main"));
			return false;
		} catch (SecurityException e) {
			return false;
		}
	}

	protected boolean internalCompilePre141(String[] args) {
		ClassLoader cl = Thread.currentThread().getContextClassLoader();
		try {
			Class sunToolsJavacMainClass = cl.loadClass("sun.tools.javac.Main");
			try {
				Constructor constructor =
					sunToolsJavacMainClass.getConstructor(constructorSignature);
				try {
					Object javacMain =
						constructor.newInstance(new Object[] { out, "javac" });
					Method compileMethod =
						sunToolsJavacMainClass.getMethod(
							"compile",
							compileMethodSignature);
					Object result =
						compileMethod.invoke(javacMain, new Object[] { args });
					if (!(result instanceof Boolean)) {
						return false;
					}
					return ((Boolean) result).booleanValue();
				} catch (InstantiationException e4) {
					return false;
				} catch (IllegalAccessException e4) {
					return false;
				} catch (IllegalArgumentException e4) {
					return false;
				} catch (InvocationTargetException e4) {
					return false;
				}

			} catch (NoSuchMethodException e3) {
				onError(
					getMessage(
						"javacompiler.nosuchmethod.error",
						"getMethod(\"compile\", compileMethodSignature)"));
				return false;
			}
		} catch (ClassNotFoundException e2) {
			return false;
		}
	}

	protected String getGenericErrorMessage() {
		return "javacompiler.error";
	}

	protected void run() {
	}

	protected boolean parseArguments(String[] args) {
		return false;
	}

	public void onError(Localizable msg) {
		report(getMessage("javacompiler.error", localizer.localize(msg)));
	}

	protected OutputStream out;

	protected static final Class[] compile141MethodSignature;
	protected static final Class[] constructorSignature;
	protected static final Class[] compileMethodSignature;

	static {
		compile141MethodSignature = new Class[2];
		compile141MethodSignature[0] = (new String[0]).getClass();
		compile141MethodSignature[1] = PrintWriter.class;
		//jdk version < 1.4.1 signature
		constructorSignature = new Class[2];
		constructorSignature[0] = OutputStream.class;
		constructorSignature[1] = String.class;
		compileMethodSignature = new Class[1];
		compileMethodSignature[0] = compile141MethodSignature[0]; // String[]

	}
}