Java Doc for Constant.java in  » Parser » Rats-Parser-Generators » xtc » type » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Parser » Rats Parser Generators » xtc.type   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    xtc.type.Constant Constant public class Constant (Code) Representation of a type's constant value. A constant value may be one of the following: A boxed byte, short, int, or long. A big integer. A boxed char. A string. A Reference . This class treats a zero as a null value. It also treats a zero as a boolean false value and any other number as a boolean true value. author:    Robert Grimm version:    $Revision: 1.11 $ Inner Class :public static enum Kind Constructor Summary public   Constant(Object value)      Create a new constant value. Method Summary public  BigInteger bigIntValue()      Get this constant's value as a big integer. public  double doubleValue()      Get this constant's value as a double. public  Kind getKind()      Get this constant's kind. public  Object getValue()      Get this constant's value. public  boolean isNull()      Determine whether this constant represents a null value. public  boolean isNumber()      Determine whether this constant's value can be treated as a number. public  boolean isReference()      Determine whether this constant's value is a reference. public  boolean isString()      Determine whether this constant's value is a string. public  boolean isTrue()      Determine whether this constant represents a boolean true value. public  long longValue()      Get this constant's value as a long. public  Reference refValue()      Get this constant's value as a reference. public  String stringValue()      Get this constant's value as a string. Constructor Detail Constant public Constant(Object value)(Code) Create a new constant value. Parameters:   value - The value. throws:   IllegalArgumentException - Signals an invalid value. Method Detail bigIntValue public BigInteger bigIntValue()(Code) Get this constant's value as a big integer. The value as a big integer. throws:   IllegalStateException - Signals that this constant cannotbe converted to a big integer. doubleValue public double doubleValue()(Code) Get this constant's value as a double. The value as a double. throws:   IllegalStateException - Signals that this constant cannotbe converted to a double. getKind public Kind getKind()(Code) Get this constant's kind. The kind. getValue public Object getValue()(Code) Get this constant's value. The value. isNull public boolean isNull()(Code) Determine whether this constant represents a null value. true if this constant represents null. isNumber public boolean isNumber()(Code) Determine whether this constant's value can be treated as a number. true if this constant's kind is an integer,big integer, double, or character. isReference public boolean isReference()(Code) Determine whether this constant's value is a reference. true if this constant's value is areference. isString public boolean isString()(Code) Determine whether this constant's value is a string. true if this constant's value is a string. isTrue public boolean isTrue()(Code) Determine whether this constant represents a boolean true value. true if this constant represents true. longValue public long longValue()(Code) Get this constant's value as a long. The value as a long. throws:   IllegalStateException - Signals that this constant cannotbe converted to a long. refValue public Reference refValue()(Code) Get this constant's value as a reference. The value as a reference. throws:   IllegalStateException - Signals that this constant is not areference. stringValue public String stringValue()(Code) Get this constant's value as a string. The value as a string. throws:   IllegalStateException - Signals that this constant is not astring. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)