001: /*
002: * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: * Free SoftwareFoundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Scott Ferguson
027: */
028:
029: package com.caucho.es;
030:
031: /**
032: * Implementation class for JavaScript booleans.
033: */
034: public class ESBoolean extends ESBase {
035: public final static ESBoolean TRUE = new ESBoolean(true);
036: public final static ESBoolean FALSE = new ESBoolean(false);
037:
038: boolean value;
039:
040: public ESBase typeof() throws ESException {
041: return ESString.create("boolean");
042: }
043:
044: public Class getJavaType() {
045: return boolean.class;
046: }
047:
048: public boolean isBoolean() {
049: return true;
050: }
051:
052: public boolean toBoolean() {
053: return value;
054: }
055:
056: public double toNum() {
057: return value ? 1.0 : 0.0;
058: }
059:
060: public ESBase getProperty(ESString key) throws Throwable {
061: return Global.getGlobalProto().boolProto.getProperty(key);
062: }
063:
064: /**
065: * Returns this as a string.
066: */
067: public ESString toStr() {
068: return ESString.create(value ? "true" : "false");
069: }
070:
071: public ESObject toObject() throws ESException {
072: return new ESWrapper("Boolean",
073: Global.getGlobalProto().boolProto, this );
074: }
075:
076: public Object toJavaObject() {
077: return new Boolean(value);
078: }
079:
080: public boolean ecmaEquals(ESBase b) throws Throwable {
081: if (b == esNull || b == esEmpty || b == esUndefined)
082: return false;
083: else
084: return toNum() == b.toNum();
085: }
086:
087: /**
088: * Returns the proper boolean
089: */
090: public static ESBoolean create(boolean value) {
091: return value ? TRUE : FALSE;
092: }
093:
094: /**
095: * Create a new object based on a prototype
096: */
097: private ESBoolean(boolean value) {
098: super(null);
099:
100: this.value = value;
101: }
102: }
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