/*

 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package com.sun.tools.sjavac;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Arrays;

import javax.tools.JavaCompiler.CompilationTask;

import javax.tools.JavaFileManager;

import com.sun.tools.javac.api.JavacTool;

import com.sun.tools.javac.code.ClassFinder;

import com.sun.tools.javac.code.Symbol.ClassSymbol;

import com.sun.tools.javac.code.Symtab;

import com.sun.tools.javac.main.JavaCompiler;

import com.sun.tools.javac.util.Context;

import com.sun.tools.javac.util.Convert;

import com.sun.tools.javac.util.Name;

import com.sun.tools.javac.util.Names;

import com.sun.tools.sjavac.comp.PubapiVisitor;

import com.sun.tools.sjavac.comp.SmartFileManager;

import com.sun.tools.sjavac.options.Options;

import com.sun.tools.sjavac.pubapi.PubApi;

public class PubApiExtractor {

    // Setup a compiler context for finding classes in the classpath

    // and to execute annotation processors.

    final Context context;

    final CompilationTask task;

    final SmartFileManager fileManager;

    /**

     * Setup a compilation context, used for reading public apis of classes on the classpath

     * as well as annotation processors.

     */

    public PubApiExtractor(Options options) {

        JavacTool compiler = com.sun.tools.javac.api.JavacTool.create();

        fileManager = new SmartFileManager(compiler.getStandardFileManager(null, null, null));

        context = new com.sun.tools.javac.util.Context();

        String[] args = options.prepJavacArgs();

        task = compiler.getTask(new PrintWriter(System.err),

                                fileManager,

                                null,

                                Arrays.asList(args),

                                null,

                                null,

                                context);

        // Trigger a creation of the JavaCompiler, necessary to get a sourceCompleter for ClassFinder.

        // The sourceCompleter is used for build situations where a classpath class references other classes

        // that happens to be on the sourcepath.

        JavaCompiler.instance(context);

//        context.put(JavaFileManager.class, fileManager);

    }

    public PubApi getPubApi(String fullyQualifiedClassName) {

        Symtab syms = Symtab.instance(context);

        ClassFinder cr = ClassFinder.instance(context);

        Names ns = Names.instance(context);

        Name n = ns.fromString(fullyQualifiedClassName);

        ClassSymbol cs = cr.loadClass(syms.inferModule(Convert.packagePart(n)), n);

        PubapiVisitor v = new PubapiVisitor();

        v.visit(cs);

        return v.getCollectedPubApi();

    }

    public void close() throws IOException {

        fileManager.close();

    }

}