/*

 * Copyright (c) 2005, 2012, 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

 * questions.

 */

package com.sun.tools.javac.api;

import java.io.IOException;

import java.util.Collection;

import java.util.Locale;

import javax.annotation.processing.Processor;

import javax.lang.model.element.Element;

import javax.lang.model.type.TypeMirror;

import javax.lang.model.util.Elements;

import javax.lang.model.util.Types;

import javax.tools.JavaFileObject;

import com.sun.source.tree.CompilationUnitTree;

import com.sun.source.tree.Tree;

import com.sun.source.util.JavacTask;

import com.sun.source.util.TaskListener;

import com.sun.tools.javac.model.JavacElements;

import com.sun.tools.javac.model.JavacTypes;

import com.sun.tools.javac.tree.JCTree;

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

/**

 * Provides basic functionality for implementations of JavacTask.

 *

 * <p><b>This is NOT part of any supported API.

 * If you write code that depends on this, you do so at your own

 * risk.  This code and its internal interfaces are subject to change

 * or deletion without notice.</b></p>

 */

public class BasicJavacTask extends JavacTask {

    protected Context context;

    private TaskListener taskListener;

    public BasicJavacTask(Context c, boolean register) {

        context = c;

        if (register)

            context.put(JavacTask.class, this);

    }

    @Override

    public Iterable<? extends CompilationUnitTree> parse() throws IOException {

        throw new IllegalStateException();

    }

    @Override

    public Iterable<? extends Element> analyze() throws IOException {

        throw new IllegalStateException();

    }

    @Override

    public Iterable<? extends JavaFileObject> generate() throws IOException {

        throw new IllegalStateException();

    }

    @Override

    public void setTaskListener(TaskListener tl) {

        MultiTaskListener mtl = MultiTaskListener.instance(context);

        if (taskListener != null)

            mtl.remove(taskListener);

        if (tl != null)

            mtl.add(tl);

        taskListener = tl;

    }

    @Override

    public void addTaskListener(TaskListener taskListener) {

        MultiTaskListener mtl = MultiTaskListener.instance(context);

        mtl.add(taskListener);

    }

    @Override

    public void removeTaskListener(TaskListener taskListener) {

        MultiTaskListener mtl = MultiTaskListener.instance(context);

        mtl.remove(taskListener);

    }

    public Collection<TaskListener> getTaskListeners() {

        MultiTaskListener mtl = MultiTaskListener.instance(context);

        return mtl.getTaskListeners();

    }

    @Override

    public TypeMirror getTypeMirror(Iterable<? extends Tree> path) {

        // TODO: Should complete attribution if necessary

        Tree last = null;

        for (Tree node : path)

            last = node;

        return ((JCTree)last).type;

    }

    @Override

    public Elements getElements() {

        return JavacElements.instance(context);

    }

    @Override

    public Types getTypes() {

        return JavacTypes.instance(context);

    }

    public void setProcessors(Iterable<? extends Processor> processors) {

        throw new IllegalStateException();

    }

    public void setLocale(Locale locale) {

        throw new IllegalStateException();

    }

    public Boolean call() {

        throw new IllegalStateException();

    }

    /**

     * For internal use only.  This method will be

     * removed without warning.

     */

    public void updateContext(Context newContext) {

        context = newContext;

    }

}