booleanconverter.java

hsql是很有名的嵌入式数据库

/* Copyright (c) 2001-2005, The HSQL Development Group
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 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package org.hsqldb.lib;

/**
 * Collection of static helper methods for converting types into boolean;
 *
 * @author: Nitin Chauhan
 * @version 1.7.2
 */
public final class BooleanConverter {

    public static Boolean getBoolean(Boolean o) {
        return o;
    }

    public static Boolean getBoolean(Double o) {
        return o.doubleValue() == 0.0 ? Boolean.FALSE
                                      : Boolean.TRUE;
    }

    public static Boolean getBoolean(Integer o) {
        return ((Number) o).longValue() == 0L ? Boolean.FALSE
                                              : Boolean.TRUE;
    }

    public static Boolean getBoolean(Long o) {
        return ((Number) o).longValue() == 0L ? Boolean.FALSE
                                              : Boolean.TRUE;
    }

    public static Boolean getBoolean(String o) {
        return o != null && o.toLowerCase().equals("true") ? Boolean.TRUE
                                                           : Boolean.FALSE;
    }
}