net.sf.saffron.oj.xlat
Class SqlToOpenjavaConverter

java.lang.Object
  |
  +--net.sf.saffron.oj.xlat.SqlToOpenjavaConverter

public class SqlToOpenjavaConverter

extends Object

A SqlToOpenjavaConverter converts a tree of SqlNode objects a ParseTree tree.

Since:

Mar 19, 2003

Version:

$Id: //open/saffron/src/net/sf/saffron/oj/xlat/SqlToOpenjavaConverter.java#7 $

Author:

jhyde

Nested Class Summary

static class	SqlToOpenjavaConverter.ConverterTest Unit test for SqlToOpenjavaConverter.
static class	SqlToOpenjavaConverter.SchemaCatalogReader A SchemaCatalogReader looks up catalog information from a saffron schema object.
(package private) static class	SqlToOpenjavaConverter.TestContext

Field Summary

(package private) static HashMap	mapBinaryOjToSql Inverse of mapBinarySqlToOj.
(package private) static HashMap	mapBinarySqlToOj Maps names of SqlBinaryOperator to codes of BinaryExpression, wrapped as Integer.
private static SqlToOpenjavaConverter.TestContext	testContext
private SqlValidator	validator

Constructor Summary

SqlToOpenjavaConverter(SqlValidator validator)

Method Summary

private static void	addBinary(String name, int code)
private Expression	convertExpression(SqlValidator.Scope scope, SqlNode node)
private Expression	convertFrom(SqlValidator.Scope scope, SqlNode from)
private ExpressionList	convertGroup(SqlValidator.Scope scope, SqlNodeList groupList)
private Expression	convertIdentifier(SqlValidator.Scope scope, SqlIdentifier identifier) Converts an identifier into an expression in a given scope.
private static int	convertJoinType(SqlJoinOperator.JoinType joinType)
private Expression	convertLiteral(SqlLiteral literal)
private ExpressionList	convertOrder(SqlValidator.Scope scope, SqlNodeList orderList)
Expression	convertQuery(SqlNode query)
private Expression	convertQueryRecursive(SqlNode query)
private QueryExpression	convertRowConstructor(SqlValidator.Scope scope, SqlCall rowConstructor)
Expression	convertSelect(SqlSelect query)
private ExpressionList	convertSelectList(SqlValidator.SelectScope scope, SqlNodeList selectList)
private Expression	convertValues(SqlValidator.Scope scope, SqlCall values)
private static HashMap	createFunctionMap()
private static HashMap	createPostfixMap()
private static HashMap	createPrefixMap()
private static SqlToOpenjavaConverter.TestContext	getTestContext()
private static void	initMaps()
static Test	suite() Standard method recognised by JUnit.

Methods inherited from class java.lang.Object

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

Field Detail

testContext

private static SqlToOpenjavaConverter.TestContext testContext

mapBinarySqlToOj

static final HashMap mapBinarySqlToOj

Maps names of SqlBinaryOperator to codes of BinaryExpression, wrapped as Integer. For example, mapBinarySqlToOj.get("/") returns Integer(BinaryExpression.DIVIDE.

mapBinaryOjToSql

static final HashMap mapBinaryOjToSql

Inverse of mapBinarySqlToOj.

validator

private final SqlValidator validator

Constructor Detail

SqlToOpenjavaConverter

public SqlToOpenjavaConverter(SqlValidator validator)

Method Detail

convertQuery

public Expression convertQuery(SqlNode query)

convertSelect

public Expression convertSelect(SqlSelect query)

suite

public static Test suite()

Standard method recognised by JUnit.

getTestContext

private static SqlToOpenjavaConverter.TestContext getTestContext()

convertExpression

private Expression convertExpression(SqlValidator.Scope scope,
                                     SqlNode node)

convertFrom

private Expression convertFrom(SqlValidator.Scope scope,
                               SqlNode from)

convertJoinType

private static int convertJoinType(SqlJoinOperator.JoinType joinType)

convertGroup

private ExpressionList convertGroup(SqlValidator.Scope scope,
                                    SqlNodeList groupList)

convertLiteral

private Expression convertLiteral(SqlLiteral literal)

convertOrder

private ExpressionList convertOrder(SqlValidator.Scope scope,
                                    SqlNodeList orderList)

convertQueryRecursive

private Expression convertQueryRecursive(SqlNode query)

initMaps

private static void initMaps()

addBinary

private static void addBinary(String name,
                              int code)

createPrefixMap

private static HashMap createPrefixMap()

createPostfixMap

private static HashMap createPostfixMap()

createFunctionMap

private static HashMap createFunctionMap()

convertIdentifier

private Expression convertIdentifier(SqlValidator.Scope scope,
                                     SqlIdentifier identifier)

Converts an identifier into an expression in a given scope. For example, the "empno" in "select empno from emp join dept" becomes "emp.empno".

convertRowConstructor

private QueryExpression convertRowConstructor(SqlValidator.Scope scope,
                                              SqlCall rowConstructor)

convertSelectList

private ExpressionList convertSelectList(SqlValidator.SelectScope scope,
                                         SqlNodeList selectList)

convertValues

private Expression convertValues(SqlValidator.Scope scope,
                                 SqlCall values)