/*
 * Copyright (c) 2002, 2016, 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.javah;

import java.io.PrintWriter;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.MissingResourceException;
import javax.tools.Diagnostic;
import javax.tools.Diagnostic.Kind;
import javax.tools.DiagnosticListener;
import javax.tools.JavaFileObject;

import com.sun.tools.javac.util.DefinedBy;
import com.sun.tools.javac.util.DefinedBy.Api;

Messages, verbose and error handling support.
For errors, the failure modes are:
     error -- User did something wrong
     bug   -- Bug has occurred in javah
     fatal -- We can't even find resources, so bail fast, don't localize
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.
/**
 * Messages, verbose and error handling support.
 *
 * For errors, the failure modes are:
 *      error -- User did something wrong
 *      bug   -- Bug has occurred in javah
 *      fatal -- We can't even find resources, so bail fast, don't localize
 *
 * <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 Util {
    
Exit is used to replace the use of System.exit in the original javah.
/** Exit is used to replace the use of System.exit in the original javah.
     */
    public static class Exit extends Error {
        private static final long serialVersionUID = 430820978114067221L;
        Exit(int exitValue) {
            this(exitValue, null);
        }

        Exit(int exitValue, Throwable cause) {
            super(cause);
            this.exitValue = exitValue;
            this.cause = cause;
        }

        Exit(Exit e) {
            this(e.exitValue, e.cause);
        }

        public final int exitValue;
        public final Throwable cause;
    }

    /*
     * Help for verbosity.
     */
    public boolean verbose = false;

    public PrintWriter log;
    public DiagnosticListener<? super JavaFileObject> dl;

    Util(PrintWriter log, DiagnosticListener<? super JavaFileObject> dl) {
        this.log = log;
        this.dl = dl;
    }

    public void log(String s) {
        log.println(s);
    }

    /*
     * Help for loading localized messages.
     */
    private ResourceBundle m;

    private void initMessages() throws Exit {
        try {
            m = ResourceBundle.getBundle("com.sun.tools.javah.resources.l10n");
        } catch (MissingResourceException mre) {
            fatal("Error loading resources.  Please file a bug report.", mre);
        }
    }

    private String getText(String key, Object... args) throws Exit {
        if (m == null)
            initMessages();
        try {
            return MessageFormat.format(m.getString(key), args);
        } catch (MissingResourceException e) {
            fatal("Key " + key + " not found in resources.", e);
        }
        return null; /* dead code */
    }

    /*
     * Failure modes.
     */
    public void bug(String key) throws Exit {
        bug(key, null);
    }

    public void bug(String key, Exception e) throws Exit {
        dl.report(createDiagnostic(Diagnostic.Kind.ERROR, key));
        dl.report(createDiagnostic(Diagnostic.Kind.NOTE, "bug.report"));
        throw new Exit(11, e);
    }

    public void error(String key, Object... args) throws Exit {
        dl.report(createDiagnostic(Diagnostic.Kind.ERROR, key, args));
        throw new Exit(15);
    }

    private void fatal(String msg, Exception e) throws Exit {
        dl.report(createDiagnostic(Diagnostic.Kind.ERROR, "", msg));
        throw new Exit(10, e);
    }

    private Diagnostic<JavaFileObject> createDiagnostic(
            final Diagnostic.Kind kind, final String code, final Object... args) {
        return new Diagnostic<JavaFileObject>() {
            @DefinedBy(Api.COMPILER)
            public String getCode() {
                return code;
            }
            @DefinedBy(Api.COMPILER)
            public long getColumnNumber() {
                return Diagnostic.NOPOS;
            }
            @DefinedBy(Api.COMPILER)
            public long getEndPosition() {
                return Diagnostic.NOPOS;
            }
            @DefinedBy(Api.COMPILER)
            public Kind getKind() {
                return kind;
            }
            @DefinedBy(Api.COMPILER)
            public long getLineNumber() {
                return Diagnostic.NOPOS;
            }
            @DefinedBy(Api.COMPILER)
            public String getMessage(Locale locale) {
                if (code.length() == 0)
                    return (String) args[0];
                return getText(code, args); // FIXME locale
            }
            @DefinedBy(Api.COMPILER)
            public long getPosition() {
                return Diagnostic.NOPOS;
            }
            @DefinedBy(Api.COMPILER)
            public JavaFileObject getSource() {
                return null;
            }
            @DefinedBy(Api.COMPILER)
            public long getStartPosition() {
                return Diagnostic.NOPOS;
            }
        };
    }
}