Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core.pattern.parser;

class Token {

    static final int PERCENT = 37;
    // static final int LEFT_PARENTHESIS = 40;
    static final int RIGHT_PARENTHESIS = 41;
    static final int MINUS = 45;
    static final int DOT = 46;
    static final int CURLY_LEFT = 123;
    static final int CURLY_RIGHT = 125;

    static final int LITERAL = 1000;
    static final int FORMAT_MODIFIER = 1002;
    static final int SIMPLE_KEYWORD = 1004;
    static final int COMPOSITE_KEYWORD = 1005;
    static final int OPTION = 1006;

    static final int EOF = Integer.MAX_VALUE;

    static Token EOF_TOKEN = new Token(EOF, "EOF");
    static Token RIGHT_PARENTHESIS_TOKEN = new Token(RIGHT_PARENTHESIS);
    static Token BARE_COMPOSITE_KEYWORD_TOKEN = new Token(COMPOSITE_KEYWORD, "BARE");
    static Token PERCENT_TOKEN = new Token(PERCENT);

    private final int type;
    private final Object value;

    public Token(int type) {
        this(type, null);
    }

    public Token(int type, Object value) {
        this.type = type;
        this.value = value;
    }

    public int getType() {
        return type;
    }

    public Object getValue() {
        return value;
    }

    public String toString() {
        String typeStr = null;
        switch (type) {

        case PERCENT:
            typeStr = "%";
            break;
        case FORMAT_MODIFIER:
            typeStr = "FormatModifier";
            break;
        case LITERAL:
            typeStr = "LITERAL";
            break;
        case OPTION:
            typeStr = "OPTION";
            break;
        case SIMPLE_KEYWORD:
            typeStr = "SIMPLE_KEYWORD";
            break;
        case COMPOSITE_KEYWORD:
            typeStr = "COMPOSITE_KEYWORD";
            break;
        case RIGHT_PARENTHESIS:
            typeStr = "RIGHT_PARENTHESIS";
            break;
        default:
            typeStr = "UNKNOWN";
        }
        if (value == null) {
            return "Token(" + typeStr + ")";

        } else {
            return "Token(" + typeStr + ", \"" + value + "\")";
        }
    }

    public int hashCode() {
        int result;
        result = type;
        result = 29 * result + (value != null ? value.hashCode() : 0);
        return result;
    }

    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (!(o instanceof Token))
            return false;

        final Token token = (Token) o;

        if (type != token.type)
            return false;
        if (value != null ? !value.equals(token.value) : token.value != null)
            return false;

        return true;
    }
}