/*

 * Copyright 2007-2008 Sun Microsystems, Inc.  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.  Sun designates this

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

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package com.sun.tools.javap;

import java.io.PrintWriter;

import com.sun.tools.classfile.AttributeException;

import com.sun.tools.classfile.ConstantPoolException;

import com.sun.tools.classfile.DescriptorException;

/*

 *  A writer similar to a PrintWriter but which does not hide exceptions.

 *  The standard print calls are line-buffered; report calls write messages directly.

 *

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

 */

public class BasicWriter {

    protected BasicWriter(Context context) {

        lineWriter = LineWriter.instance(context);

        out = context.get(PrintWriter.class);

    }

    protected void print(String s) {

        lineWriter.print(s);

    }

    protected void print(Object o) {

        lineWriter.print(o == null ? null : o.toString());

    }

    protected void println() {

        lineWriter.println();

    }

    protected void println(String s) {

        lineWriter.print(s);

        lineWriter.println();

    }

    protected void println(Object o) {

        lineWriter.print(o == null ? null : o.toString());

        lineWriter.println();

    }

    protected String report(AttributeException e) {

        out.println("Error: " + e.getMessage()); // i18n?

        return "???";

    }

    protected String report(ConstantPoolException e) {

        out.println("Error: " + e.getMessage()); // i18n?

        return "???";

    }

    protected String report(DescriptorException e) {

        out.println("Error: " + e.getMessage()); // i18n?

        return "???";

    }

    protected String report(String msg) {

        out.println("Error: " + msg); // i18n?

        return "???";

    }

    private LineWriter lineWriter;

    private PrintWriter out;

    private static class LineWriter {

        static LineWriter instance(Context context) {

            LineWriter instance = context.get(LineWriter.class);

            if (instance == null)

                instance = new LineWriter(context);

            return instance;

        }

        protected LineWriter(Context context) {

            context.put(LineWriter.class, this);

            out = context.get(PrintWriter.class);

            buffer = new StringBuilder();

        }

        protected void print(String s) {

            if (s == null)

                s = "null";

            for (int i = 0; i < s.length(); i++) {

                char c = s.charAt(i);

                if (c == '\n') {

                    println();

                } else {

                    buffer.append(c);

                }

            }

        }

        protected void println() {

            out.println(buffer);

            buffer.setLength(0);

        }

        private PrintWriter out;

        private StringBuilder buffer;

    }

}