Java Doc for ConstantExpression.java in  » Development » JoSQL » org » josql » expressions » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » JoSQL » org.josql.expressions   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.josql.expressions.Expression       org.josql.expressions.ValueExpression          org.josql.expressions.ConstantExpression ConstantExpression public class ConstantExpression extends ValueExpression (Code) This class represents a constant String or number. ALL numbers in JoSQL are represented by double. Method Summary public  Object evaluate(Object o, Query q)      Get the value of this constant. Parameters:   o - The current object, not used in this method. Parameters:   q - The Query object, not used in this method. public  Class getExpectedReturnType(Query q)      Get the expected return type. Will be either: java.lang.String.class or: java.lang.Double.class. Parameters:   q - The Query object. public  Object getValue(Object o, Query q)      Get the value of this constant. Parameters:   o - The current object, not used in this method. Parameters:   q - The Query object, not used in this method. public  boolean hasFixedResult(Query q)      Always returns true, well duh! Parameters:   q - The Query object. public  void init(Query q)      public  boolean isTrue(Object o, Query q)      Returns whether the value of this constant represents a true value. public  void setValue(Object v)      public  String toString()      Returns a string representation of this constant. If the constant is a String then it should be noted that the original quoting character is not kept in this class and the output of this method will contain the character "'" instead. Method Detail evaluate public Object evaluate(Object o, Query q)(Code) Get the value of this constant. Parameters:   o - The current object, not used in this method. Parameters:   q - The Query object, not used in this method. The constant value. getExpectedReturnType public Class getExpectedReturnType(Query q)(Code) Get the expected return type. Will be either: java.lang.String.class or: java.lang.Double.class. Parameters:   q - The Query object. The expected class. getValue public Object getValue(Object o, Query q)(Code) Get the value of this constant. Parameters:   o - The current object, not used in this method. Parameters:   q - The Query object, not used in this method. The constant value. hasFixedResult public boolean hasFixedResult(Query q)(Code) Always returns true, well duh! Parameters:   q - The Query object. true always. init public void init(Query q)(Code) Inits the expression, in reality does nothing here, can't init a constant! Parameters:   q - The Query object. isTrue public boolean isTrue(Object o, Query q)(Code) Returns whether the value of this constant represents a true value. See: ArithmeticExpression.isTrue(ObjectQuery) for details of how the return value is determined. Parameters:   o - The current object. Not used in this method. Parameters:   q - The Query object. true if the constant evaluates to true. setValue public void setValue(Object v)(Code) toString public String toString()(Code) Returns a string representation of this constant. If the constant is a String then it should be noted that the original quoting character is not kept in this class and the output of this method will contain the character "'" instead. If the constant is a number then "toString" is called on it, so any "," or other number formatting will have been lost. A string representation of this constant. Methods inherited from org.josql.expressions.ValueExpression abstract public Object evaluate(Object o, Query q) throws QueryExecutionException(Code)(Java Doc) public Object getValue(Object o, Query q) throws QueryExecutionException(Code)(Java Doc) Methods inherited from org.josql.expressions.Expression abstract public Class getExpectedReturnType(Query q) throws QueryParseException(Code)(Java Doc) abstract public Object getValue(Object o, Query q) throws QueryExecutionException(Code)(Java Doc) abstract public boolean hasFixedResult(Query q)(Code)(Java Doc) abstract public void init(Query q) throws QueryParseException(Code)(Java Doc) public boolean isBracketed()(Code)(Java Doc) abstract public boolean isTrue(Object o, Query q) throws QueryExecutionException(Code)(Java Doc) public void setBracketed(boolean v)(Code)(Java Doc) abstract public String toString()(Code)(Java Doc) 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)