Java Doc for AliasedExpression.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.AliasedExpression All known Subclasses:   org.josql.expressions.AliasedFunction, AliasedExpression public class AliasedExpression extends Expression (Code) Represents an expression that also has an alias. SELECT columns may have aliases as may the functions in the "EXECUTE ON" clause. Field Summary protected  Expression exp      Method Summary public  String getAlias()      Get the alias for the expression. public  Class getExpectedReturnType(Query q)      Get the expected return type for the expression. Parameters:   q - The Query object. public  Expression getExpression()      Get the expression being aliased. public  Object getValue(Object o, Query q)      Get the value for this expression. Parameters:   o - The object to perform the expression on. Parameters:   q - The Query object. public  boolean hasFixedResult(Query q)      Return whether this expression has a fixed result. See: Expression.hasFixedResult(Query) for more details. Parameters:   q - The Query object. public  void init(Query q)      Init this expression. public  boolean isTrue(Object o, Query q)      Indicate whether the expression evaluates to true. Parameters:   o - The object to perform the expression on. Parameters:   q - The Query object. public  void setAlias(String a)      public  void setExpression(Expression exp)      public  String toString()      Return a string representation of the aliased expression. Field Detail exp protected Expression exp(Code) Method Detail getAlias public String getAlias()(Code) Get the alias for the expression. The alias. getExpectedReturnType public Class getExpectedReturnType(Query q) throws QueryParseException(Code) Get the expected return type for the expression. Parameters:   q - The Query object. The class of the return type. throws:   QueryParseException - If an error occurs whilst trying to determine thereturn type. getExpression public Expression getExpression()(Code) Get the expression being aliased. The expression. getValue public Object getValue(Object o, Query q) throws QueryExecutionException(Code) Get the value for this expression. Parameters:   o - The object to perform the expression on. Parameters:   q - The Query object. The result of calling: Expression.getValue(ObjectQuery). throws:   QueryExecutionException - If something goes wrong with the execution of theexpression. hasFixedResult public boolean hasFixedResult(Query q)(Code) Return whether this expression has a fixed result. See: Expression.hasFixedResult(Query) for more details. Parameters:   q - The Query object. true if the expression returns a fixed result, false otherwise. init public void init(Query q) throws QueryParseException(Code) Init this expression. All that occurs here is that the aliased expression is inited via: Expression.init(Query) . Parameters:   q - The Query object. throws:   QueryParseException - If an error occurs during the initialisation of theexpression. isTrue public boolean isTrue(Object o, Query q) throws QueryExecutionException(Code) Indicate whether the expression evaluates to true. Parameters:   o - The object to perform the expression on. Parameters:   q - The Query object. true if the expression evaulates to true, falseotherwise. throws:   QueryExecutionException - If something goes wrong during execution of the:Expression.isTrue(ObjectQuery) method. See Also:   Expression.isTrue(ObjectQuery) setAlias public void setAlias(String a)(Code) setExpression public void setExpression(Expression exp)(Code) toString public String toString()(Code) Return a string representation of the aliased expression. Returns in the form: Expression AS Alias. The result of calling: Expression.toString + AS + AliasedExpression.getAlias(). 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)