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

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