org.datanucleus.query.expression
Class InvokeExpression

java.lang.Object
  org.datanucleus.query.expression.Expression
      org.datanucleus.query.expression.InvokeExpression

public class InvokeExpression
extends Expression

Expression representing invocation of a method. This may be an aggregate in a result clause (like "count(this)"), or a method on a class, or a function. The "left" expression is what we are invoking on. This is typically a PrimaryExpression, or an InvokeExpression. This then allows chaining of invocations.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.query.expression.Expression

Expression.DyadicOperator, Expression.MonadicOperator, Expression.Operator

Field Summary

Fields inherited from class org.datanucleus.query.expression.Expression

alias, left, LOCALISER, op, OP_ADD, OP_AND, OP_COM, OP_CONCAT, OP_DISTINCT, OP_DIV, OP_EQ, OP_GT, OP_GTEQ, OP_IN, OP_IS, OP_ISNOT, OP_LIKE, OP_LT, OP_LTEQ, OP_MOD, OP_MUL, OP_NEG, OP_NOT, OP_NOTEQ, OP_OR, OP_SUB, right, symbol

Constructor Summary

InvokeExpression(Expression invoked, java.lang.String methodName, java.util.List args)
Constructor for an expression for the invocation of a method/function.

Method Summary

Symbol	bind(SymbolTable symtbl) Method to bind the expression to the symbol table as appropriate.
java.util.List<Expression>	getArguments() Accessor for any arguments to be passed in the invocation.
java.lang.String	getOperation() The method/function invoked.
java.lang.String	toString()

Methods inherited from class org.datanucleus.query.expression.Expression

evaluate, getAlias, getLeft, getOperator, getRight, getSymbol, setAlias

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

InvokeExpression

public InvokeExpression(Expression invoked,
                        java.lang.String methodName,
                        java.util.List args)

Constructor for an expression for the invocation of a method/function.

Parameters:

invoked - Expression on which we are invoking

methodName - Name of the method

args - Arguments passed in to the method/function call

Method Detail

getOperation

public java.lang.String getOperation()

The method/function invoked.

Returns:

The method/function invoked.

getArguments

public java.util.List<Expression> getArguments()

Accessor for any arguments to be passed in the invocation.

Returns:

The arguments.

bind

public Symbol bind(SymbolTable symtbl)

Method to bind the expression to the symbol table as appropriate.

Specified by:

bind in class Expression

Parameters:

symtbl - Symbol table

Returns:

The symbol for this expression

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object