org.openl.util.BooleanUtils Maven / Gradle / Ivy
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package org.openl.util;
/**
* An utility for manipulating with booleans: - converting an object to a boolean value - logic operation with a boolean
* array (and, or, xor)
*
* @author Yury Molchan
*/
public final class BooleanUtils {
private BooleanUtils() {
}
/**
* Converts an Object to a boolean. For String value 'true', 'on', 'yes', 'y' or 't' (case insensitive) will return
* true. Otherwise, false is returned. For Integer value 0 will return false. Otherwise, true is returned.
*
* @param value Object value
* @return boolean value
*/
public static boolean toBoolean(Object value) {
Boolean bValue = toBooleanObject(value);
if (bValue == null) {
return false;
}
return bValue;
}
/**
* Converts an Object to a boolean. For String value 'true', 'on', 'yes', 'y' or 't' (case insensitive) will return
* true. Otherwise, false is returned. For Integer value 0 will return false. Otherwise, true is returned. Returns
* boolean value or default value if the input value is null or not a Boolean.
*
* @param value Object value
* @param defaultValue The default boolean value to return if the value is null or not a Boolean
* @return boolean value
*/
public static boolean toBoolean(Object value, boolean defaultValue) {
return toBooleanObject(value, defaultValue);
}
/**
* Converts an Object to a Boolean. For String value 'true', 'on', 'yes', 'y' or 't' (case insensitive) will return
* true. 'false', 'off', 'no', 'n' or 'f' (case insensitive) will return false. Otherwise, null is returned. For
* Integer value 0 will return false, null will return null. Otherwise, true is returned.
*
* @param value Object value
* @return Boolean value
*/
public static Boolean toBooleanObject(Object value) {
Boolean bValue = null;
if (value instanceof String) {
bValue = toBooleanObject((String) value);
} else if (value instanceof Integer) {
bValue = (Integer) value != 0;
} else if (value instanceof Boolean) {
bValue = (Boolean) value;
}
return bValue;
}
/**
*
* Converts a String to a Boolean.
*
*
*
* {@code 'true'}, {@code 'on'}, {@code 'y'}, {@code 't'} or {@code 'yes'} (case insensitive) will return
* {@code true}. {@code 'false'}, {@code 'off'}, {@code 'n'}, {@code 'f'} or {@code 'no'} (case insensitive) will
* return {@code false}. Otherwise, {@code null} is returned.
*
*
*
* NOTE: This returns null and will throw a NullPointerException if autoboxed to a boolean.
*
*
*
* // N.B. case is not significant
* BooleanUtils.toBooleanObject(null) = null
* BooleanUtils.toBooleanObject("true") = Boolean.TRUE
* BooleanUtils.toBooleanObject("T") = Boolean.TRUE // i.e. T[RUE]
* BooleanUtils.toBooleanObject("false") = Boolean.FALSE
* BooleanUtils.toBooleanObject("f") = Boolean.FALSE // i.e. f[alse]
* BooleanUtils.toBooleanObject("No") = Boolean.FALSE
* BooleanUtils.toBooleanObject("n") = Boolean.FALSE // i.e. n[o]
* BooleanUtils.toBooleanObject("on") = Boolean.TRUE
* BooleanUtils.toBooleanObject("ON") = Boolean.TRUE
* BooleanUtils.toBooleanObject("off") = Boolean.FALSE
* BooleanUtils.toBooleanObject("oFf") = Boolean.FALSE
* BooleanUtils.toBooleanObject("yes") = Boolean.TRUE
* BooleanUtils.toBooleanObject("Y") = Boolean.TRUE // i.e. Y[ES]
* BooleanUtils.toBooleanObject("blue") = null
* BooleanUtils.toBooleanObject("true ") = null // trailing space (too long)
* BooleanUtils.toBooleanObject("ono") = null // does not match on or no
*
*
* @param str the String to check; upper and lower case are treated as the same
* @return the Boolean value of the string, {@code null} if no match or {@code null} input
*/
public static Boolean toBooleanObject(final String str) {
// Previously used equalsIgnoreCase, which was fast for interned 'true'.
// Non interned 'true' matched 15 times slower.
//
// Optimisation provides same performance as before for interned 'true'.
// Similar performance for null, 'false', and other strings not length 2/3/4.
// 'true'/'TRUE' match 4 times slower, 'tRUE'/'True' 7 times slower.
if ("true".equals(str)) {
return Boolean.TRUE;
}
if (str == null) {
return null;
}
switch (str.length()) {
case 1: {
final char ch0 = str.charAt(0);
if (ch0 == 'y' || ch0 == 'Y' || ch0 == 't' || ch0 == 'T') {
return Boolean.TRUE;
}
if (ch0 == 'n' || ch0 == 'N' || ch0 == 'f' || ch0 == 'F') {
return Boolean.FALSE;
}
break;
}
case 2: {
final char ch0 = str.charAt(0);
final char ch1 = str.charAt(1);
if ((ch0 == 'o' || ch0 == 'O') && (ch1 == 'n' || ch1 == 'N')) {
return Boolean.TRUE;
}
if ((ch0 == 'n' || ch0 == 'N') && (ch1 == 'o' || ch1 == 'O')) {
return Boolean.FALSE;
}
break;
}
case 3: {
final char ch0 = str.charAt(0);
final char ch1 = str.charAt(1);
final char ch2 = str.charAt(2);
if ((ch0 == 'y' || ch0 == 'Y') && (ch1 == 'e' || ch1 == 'E') && (ch2 == 's' || ch2 == 'S')) {
return Boolean.TRUE;
}
if ((ch0 == 'o' || ch0 == 'O') && (ch1 == 'f' || ch1 == 'F') && (ch2 == 'f' || ch2 == 'F')) {
return Boolean.FALSE;
}
break;
}
case 4: {
final char ch0 = str.charAt(0);
final char ch1 = str.charAt(1);
final char ch2 = str.charAt(2);
final char ch3 = str.charAt(3);
if ((ch0 == 't' || ch0 == 'T')
&& (ch1 == 'r' || ch1 == 'R')
&& (ch2 == 'u' || ch2 == 'U')
&& (ch3 == 'e' || ch3 == 'E')) {
return Boolean.TRUE;
}
break;
}
case 5: {
final char ch0 = str.charAt(0);
final char ch1 = str.charAt(1);
final char ch2 = str.charAt(2);
final char ch3 = str.charAt(3);
final char ch4 = str.charAt(4);
if ((ch0 == 'f' || ch0 == 'F')
&& (ch1 == 'a' || ch1 == 'A')
&& (ch2 == 'l' || ch2 == 'L')
&& (ch3 == 's' || ch3 == 'S')
&& (ch4 == 'e' || ch4 == 'E')) {
return Boolean.FALSE;
}
break;
}
default:
break;
}
return null;
}
/**
* Converts an Object to a Boolean. For String value 'true', 'on', 'yes', 'y' or 't' (case insensitive) will return
* true. 'false', 'off', 'no', 'n' or 'f' (case insensitive) will return false. Otherwise, null is returned. For
* Integer value 0 will return false, null will return null. Otherwise, true is returned. Returns Boolean value or
* default value if the input value is null or not a Boolean.
*
* @param value Object value
* @param defaultValue The default Boolean value to return if the value is null or not a Boolean
* @return Boolean value
*/
public static Boolean toBooleanObject(Object value, Boolean defaultValue) {
Boolean bValue = toBooleanObject(value);
return bValue == null ? defaultValue : bValue;
}
}