/*
 * 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;
    }
}