package clime.messadmin.utils;
import java.io.Serializable;
/**
* Comparable Boolean for JDK <= 1.4. Useless for JDK 5.
* Note that some static methods have been removed, as they where already defined in Boolean.
* This class is not intended as a replacement for java.lang.Boolean!
*
* (From the JDK documentation:)
* The Boolean class wraps a value of the primitive type
* <code>boolean</code> in an object. An object of type
* <code>Boolean</code> contains a single field whose type is
* <code>boolean</code>.
* <p>
* In addition, this class provides many methods for
* converting a <code>boolean</code> to a <code>String</code> and a
* <code>String</code> to a <code>boolean</code>, as well as other
* constants and methods useful when dealing with a
* <code>boolean</code>.
*
* @author Arthur van Hoff, Cédrik LIME
* @version 1.51, 05/11/04
* @since JDK1.0
*/
public final class ComparableBoolean implements Serializable, Comparable {//extends Boolean
/**
* The <code>ComparableBoolean</code> object corresponding to the primitive
* value <code>true</code>.
*/
public static final ComparableBoolean TRUE = new ComparableBoolean(true);
/**
* The <code>ComparableBoolean</code> object corresponding to the primitive
* value <code>false</code>.
*/
public static final ComparableBoolean FALSE = new ComparableBoolean(false);
/**
* The Class object representing the primitive type boolean.
*
* @since JDK1.1
*/
public static final Class TYPE = Boolean.TYPE;
/**
* The value of the Boolean.
*
* @serial
*/
private final boolean value;
/** use serialVersionUID from JDK 1.0.2 for interoperability */
//private static final long serialVersionUID = -3665804199014368530L;
/**
* Allocates a <code>ComparableBoolean</code> object representing the
* <code>value</code> argument.
*
* <p><b>Note: It is rarely appropriate to use this constructor.
* Unless a <i>new</i> instance is required, the static factory
* {@link #valueOf(boolean)} is generally a better choice. It is
* likely to yield significantly better space and time performance.</b>
*
* @param value the value of the <code>Boolean</code>.
*/
private ComparableBoolean(boolean value) {
this.value = value;
}
/**
* Returns the value of this <tt>ComparableBoolean</tt> object as a boolean
* primitive.
*
* @return the primitive <code>boolean</code> value of this object.
*/
public boolean booleanValue() {
return value;
}
/**
* Returns a <tt>ComparableBoolean</tt> instance representing the specified
* <tt>boolean</tt> value. If the specified <tt>boolean</tt> value
* is <tt>true</tt>, this method returns <tt>ComparableBoolean.TRUE</tt>;
* if it is <tt>false</tt>, this method returns <tt>ComparableBoolean.FALSE</tt>.
* If a new <tt>ComparableBoolean</tt> instance is not required, this method
* should generally be used in preference to the constructor
* {@link #ComparableBoolean(boolean)}, as this method is likely to yield
* significantly better space and time performance.
*
* @param b a boolean value.
* @return a <tt>ComparableBoolean</tt> instance representing <tt>b</tt>.
* @since 1.4
*/
public static ComparableBoolean valueOf(boolean b) {
return (b ? TRUE : FALSE);
}
/**
* Returns a <tt>String</tt> object representing this ComparableBoolean's
* value. If this object represents the value <code>true</code>,
* a string equal to <code>"true"</code> is returned. Otherwise, a
* string equal to <code>"false"</code> is returned.
*
* @return a string representation of this object.
*/
public String toString() {
return value ? "true" : "false";//Boolean.toString(value);//$NON-NLS-1$//$NON-NLS-2$
}
/**
* Returns a hash code for this <tt>ComparableBoolean</tt> object.
*
* @return the integer <tt>1231</tt> if this object represents
* <tt>true</tt>; returns the integer <tt>1237</tt> if this
* object represents <tt>false</tt>.
*/
public int hashCode() {
return value ? 1231 : 1237;//Boolean.valueOf(value).hashCode();
}
/**
* Returns <code>true</code> if and only if the argument is not
* <code>null</code> and is a <code>ComparableBoolean</code> object that
* represents the same <code>boolean</code> value as this object.
*
* @param obj the object to compare with.
* @return <code>true</code> if the Boolean objects represent the
* same value; <code>false</code> otherwise.
*/
public boolean equals(Object obj) {
if (obj instanceof ComparableBoolean) {
return value == ((ComparableBoolean)obj).booleanValue();
}
if (obj instanceof Boolean) {
return value == ((Boolean)obj).booleanValue();
}
return false;
}
/**
* Compares this <tt>ComparableBoolean</tt> instance with another.
*
* @param o the <tt>ComparableBoolean</tt> or <tt>Boolean</tt> instance to be compared
* @return zero if this object represents the same boolean value as the
* argument; a positive value if this object represents true
* and the argument represents false; and a negative value if
* this object represents false and the argument represents true
* @throws NullPointerException if the argument is <tt>null</tt>
* @see Comparable
* @since 1.5
*/
public int compareTo(Object o) {
if (o instanceof ComparableBoolean) {
Boolean bool = ((ComparableBoolean)o).value ? Boolean.TRUE : Boolean.FALSE;//Boolean.valueOf(((ComparableBoolean)o).value);
return compareTo(bool);
} else if (o instanceof Boolean) {
return (((Boolean)o).booleanValue() == value ? 0 : (value ? 1 : -1));
}
throw new ClassCastException(o.getClass().getName());
}
}
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