org.eigenbase.oj.util
Class JavaRexBuilder

java.lang.Object
  org.eigenbase.rex.RexBuilder
      org.eigenbase.oj.util.JavaRexBuilder

Direct Known Subclasses:

FarragoRexBuilder

public class JavaRexBuilder
extends RexBuilder

Extends RexBuilder to builds row-expressions including those involving Java code.

Since:

Nov 23, 2003

Version:

$Id: //open/dev/farrago/src/org/eigenbase/oj/util/JavaRexBuilder.java#12 $

Author:

jhyde

See Also:

JavaRowExpression

Nested Class Summary

private static class

JavaRexBuilder.OJTranslator

Field Summary

(package private) JavaRexBuilder.OJTranslator

translator

Fields inherited from class org.eigenbase.rex.RexBuilder

typeFactory

Constructor Summary

JavaRexBuilder(RelDataTypeFactory typeFactory)

Method Summary

RexNode	createMethodCall(Environment env, RexNode exp, String methodName, List<RexNode> args) Creates a call to a Java method.
RexNode	makeCase(RexNode rexCond, RexNode rexTrueCase, RexNode rexFalseCase)
RexNode	makeCast(RelDataType type, RexNode exp) Creates a call to the CAST operator, expanding if possible.
RexNode	makeFieldAccess(RexNode exp, String fieldName) Creates an expression accessing a given named field from a record.
RexNode	makeJava(Environment env, Expression expr)

Methods inherited from class org.eigenbase.rex.RexBuilder

addAggCall, constantNull, copy, deriveReturnType, getOpTab, getTypeFactory, makeAbstractCast, makeApproxLiteral, makeApproxLiteral, makeBigintLiteral, makeBinaryLiteral, makeCall, makeCall, makeCall, makeCharLiteral, makeCorrel, makeDateLiteral, makeDynamicParam, makeExactLiteral, makeExactLiteral, makeFieldAccess, makeFlag, makeInputRef, makeIntervalLiteral, makeIntervalLiteral, makeLiteral, makeLiteral, makeLiteral, makeNewInvocation, makeNotNullCast, makeNullLiteral, makeNullLiteral, makeOver, makePreciseStringLiteral, makeRangeReference, makeRangeReference, makeReinterpretCast, makeTimeLiteral, makeTimestampLiteral

Methods inherited from class java.lang.Object

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

Field Detail

translator

JavaRexBuilder.OJTranslator translator

Constructor Detail

JavaRexBuilder

public JavaRexBuilder(RelDataTypeFactory typeFactory)

Method Detail

makeFieldAccess

public RexNode makeFieldAccess(RexNode exp,
                               String fieldName)

Description copied from class: RexBuilder

Creates an expression accessing a given named field from a record.

Overrides:

makeFieldAccess in class RexBuilder

Parameters:

exp - Expression yielding a record

fieldName - Name of field in record

Returns:

Expression accessing a given named field

createMethodCall

public RexNode createMethodCall(Environment env,
                                RexNode exp,
                                String methodName,
                                List<RexNode> args)

Creates a call to a Java method.

Parameters:

exp - Target of the method

methodName - Name of the method

args - Argument expressions; null means no arguments

Returns:

Method call

makeJava

public RexNode makeJava(Environment env,
                        Expression expr)

makeCase

public RexNode makeCase(RexNode rexCond,
                        RexNode rexTrueCase,
                        RexNode rexFalseCase)

makeCast

public RexNode makeCast(RelDataType type,
                        RexNode exp)

Description copied from class: RexBuilder

Creates a call to the CAST operator, expanding if possible.

Overrides:

makeCast in class RexBuilder

Parameters:

type - Type to cast to

exp - Expression being cast

Returns:

Call to CAST operator