org.datanucleus.query.expression

Class ExpressionCompiler

java.lang.Object

org.datanucleus.query.expression.ExpressionCompiler

public class ExpressionCompiler
extends Object

Compiler for expressions. Responsible for taking a Node tree and creating an Expression tree.

Constructor Summary

Constructors

Constructor and Description
ExpressionCompiler()

Method Summary

Methods

Modifier and Type	Method and Description
Expression	compileExpression(Node node) Primary entry point for compiling a node for the filter, grouping, having, result clauses.
Expression	compileFromExpression(Node node, boolean classIsExpression) Primary entry point for compiling a node for the from clause.
Expression	compileOrderExpression(Node node) Primary entry point for compiling a node for the order clause.
void	setMethodAliases(Map<String,String> aliasByPrefix)
void	setSymbolTable(SymbolTable symtbl)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionCompiler

public ExpressionCompiler()

Method Detail

setMethodAliases

public void setMethodAliases(Map<String,String> aliasByPrefix)

setSymbolTable

public void setSymbolTable(SymbolTable symtbl)

compileOrderExpression

public Expression compileOrderExpression(Node node)

Primary entry point for compiling a node for the order clause.

Parameters:

node - The node

Returns:

Its compiled expression

compileFromExpression

public Expression compileFromExpression(Node node,
                               boolean classIsExpression)

Primary entry point for compiling a node for the from clause.

Parameters:

node - The node

classIsExpression - whether the class of the from node is an expression relating to the outer query

Returns:

Its compiled expression

compileExpression

public Expression compileExpression(Node node)

Primary entry point for compiling a node for the filter, grouping, having, result clauses.

Parameters:

node - The node

Returns:

Its compiled expression