org.datanucleus.query.compiler
Class JPQLParser

java.lang.Object
  org.datanucleus.query.compiler.JPQLParser

All Implemented Interfaces:

Parser

public class JPQLParser
extends java.lang.Object
implements Parser

Implementation of a parser for JPQL query language.

Constructor Summary

JPQLParser(java.util.Map options)
Constructor for a JPQL Parser.

Method Summary

Node	compile(java.lang.String expression)
protected void	compileAdditiveExpression()
Node[]	compileFrom(java.lang.String expression) Method to compile the "from" clause, but JDOQL has no "from" so do nothing.
protected boolean	compileLiteral() A literal is one value of any type.
protected void	compileMultiplicativeExpression()
Node[]	compileOrder(java.lang.String expression)
Node[][]	compileParameters(java.lang.String expression)
protected void	compilePrimary() Compiles the primary.
Node[]	compileTupple(java.lang.String expression)
protected void	compileUnaryExpression()
protected void	compileUnaryExpressionNotPlusMinus()
Node	compileVariable(java.lang.String expression)
Node[][]	compileVariables(java.lang.String expression)

Methods inherited from class java.lang.Object

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

Constructor Detail

JPQLParser

public JPQLParser(java.util.Map options)

Constructor for a JPQL Parser.

Parameters:

options - parser options

Method Detail

compile

public Node compile(java.lang.String expression)

Specified by:

compile in interface Parser

compileVariable

public Node compileVariable(java.lang.String expression)

Specified by:

compileVariable in interface Parser

compileFrom

public Node[] compileFrom(java.lang.String expression)

Method to compile the "from" clause, but JDOQL has no "from" so do nothing.

Specified by:

compileFrom in interface Parser

Parameters:

expression - From string

Returns:

Node trees for this from clause

compileOrder

public Node[] compileOrder(java.lang.String expression)

Specified by:

compileOrder in interface Parser

compileTupple

public Node[] compileTupple(java.lang.String expression)

Specified by:

compileTupple in interface Parser

compileVariables

public Node[][] compileVariables(java.lang.String expression)

Specified by:

compileVariables in interface Parser

compileParameters

public Node[][] compileParameters(java.lang.String expression)

Specified by:

compileParameters in interface Parser

compileAdditiveExpression

protected void compileAdditiveExpression()

compileMultiplicativeExpression

protected void compileMultiplicativeExpression()

compileUnaryExpression

protected void compileUnaryExpression()

compileUnaryExpressionNotPlusMinus

protected void compileUnaryExpressionNotPlusMinus()

compilePrimary

protected void compilePrimary()

Compiles the primary. First look for a literal (e.g. "text"), then an identifier(e.g. variable) In the next step, call a function, if executing a function, on the literal or the identifier found.

compileLiteral

protected boolean compileLiteral()

A literal is one value of any type. Supported literals are of types String, Floating Point, Integer, Character, Boolean and null e.g. 'J', "String", 1, 1.8, true, false, null.

Returns:

The compiled literal