Java Doc for IsNullExpression.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.BinaryExpression          org.josql.expressions.IsNullExpression IsNullExpression public class IsNullExpression extends BinaryExpression (Code) Represents an "IS NULL" (or "IS NOT NULL") expression. Method Summary public  boolean isNot()      public  boolean isTrue(Object o, Query q)      Determine whether the LHS of this expression is or is not null. Note that this is equivalent to: LHS = null or: LHS != null. Parameters:   o - The current object to perform the expression on. Parameters:   q - The Query object. public  void setNot(boolean v)      public  String toString()      Return a string representation of this expression. Method Detail isNot public boolean isNot()(Code) isTrue public boolean isTrue(Object o, Query q) throws QueryExecutionException(Code) Determine whether the LHS of this expression is or is not null. Note that this is equivalent to: LHS = null or: LHS != null. Parameters:   o - The current object to perform the expression on. Parameters:   q - The Query object. true if the LHS is null (or not null is specified). throws:   QueryExecutionException - If the expression cannot be evaluated. setNot public void setNot(boolean v)(Code) toString public String toString()(Code) Return a string representation of this expression. In the form: Expression.toString IS [ NOT ] NULL A string representation of this expression. Fields inherited from org.josql.expressions.BinaryExpression protected Expression left(Code)(Java Doc) protected Expression right(Code)(Java Doc) Methods inherited from org.josql.expressions.BinaryExpression public Class getExpectedReturnType(Query q)(Code)(Java Doc) public Expression getLeft()(Code)(Java Doc) public Expression getRight()(Code)(Java Doc) public Object getValue(Object o, Query q) throws QueryExecutionException(Code)(Java Doc) public boolean hasFixedResult(Query q)(Code)(Java Doc) public void init(Query q) throws QueryParseException(Code)(Java Doc) public void setLeft(Expression exp)(Code)(Java Doc) public void setRight(Expression exp)(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)