001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.core.pattern.parser;
015
016public class Node {
017    static final int LITERAL = 0;
018    static final int SIMPLE_KEYWORD = 1;
019    static final int COMPOSITE_KEYWORD = 2;
020
021    final int type;
022    final Object value;
023    Node next;
024
025    Node(int type) {
026        this(type, null);
027    }
028
029    Node(int type, Object value) {
030        this.type = type;
031        this.value = value;
032    }
033
034    /**
035     * @return Returns the type.
036     */
037    public int getType() {
038        return type;
039    }
040
041    /**
042     * @return Returns the value.
043     */
044    public Object getValue() {
045        return value;
046    }
047
048    public Node getNext() {
049        return next;
050    }
051
052    public void setNext(Node next) {
053        this.next = next;
054    }
055
056    public boolean equals(Object o) {
057        if (this == o) {
058            return true;
059        }
060        if (!(o instanceof Node)) {
061            return false;
062        }
063        Node r = (Node) o;
064
065        return (type == r.type) && (value != null ? value.equals(r.value) : r.value == null)
066                && (next != null ? next.equals(r.next) : r.next == null);
067    }
068
069    @Override
070    public int hashCode() {
071        int result = type;
072        result = 31 * result + (value != null ? value.hashCode() : 0);
073        return result;
074    }
075
076    String printNext() {
077        if (next != null) {
078            return " -> " + next;
079        } else {
080            return "";
081        }
082    }
083
084    public String toString() {
085        StringBuilder buf = new StringBuilder();
086        switch (type) {
087        case LITERAL:
088            buf.append("LITERAL(" + value + ")");
089            break;
090        default:
091            buf.append(super.toString());
092        }
093
094        buf.append(printNext());
095
096        return buf.toString();
097    }
098}