Package mondrian.calc.impl

Class AbstractExpCompiler

java.lang.Object
mondrian.calc.impl.AbstractExpCompiler
All Implemented Interfaces:
ExpCompiler
Direct Known Subclasses:
BetterExpCompiler
public class AbstractExpCompiler extends Object implements ExpCompiler
Abstract implementation of the ExpCompiler interface.
Since:
Sep 29, 2005
Author:
jhyde

  • Constructor Details

    • AbstractExpCompiler

      public AbstractExpCompiler(Evaluator evaluator, Validator validator)
      Creates an AbstractExpCompiler
      Parameters:
      evaluator - Evaluator
      validator - Validator

    • AbstractExpCompiler

      public AbstractExpCompiler(Evaluator evaluator, Validator validator, List<ResultStyle> resultStyles)
      Creates an AbstractExpCompiler which is constrained to produce one of a set of result styles.
      Parameters:
      evaluator - Evaluator
      validator - Validator
      resultStyles - List of result styles, preferred first, must not be

  • Method Details

    • getEvaluator

      public Evaluator getEvaluator()
      Description copied from interface: ExpCompiler
      Returns the evaluator to be used for evaluating expressions during the compilation process.
      Specified by:
      getEvaluator in interface ExpCompiler

    • getValidator

      public Validator getValidator()
      Description copied from interface: ExpCompiler
      Returns the validator which was used to validate this expression.
      Specified by:
      getValidator in interface ExpCompiler
      Returns:
      validator

    • compile

      public Calc compile(Exp exp)
      Compiles an expression. Uses the current ResultStyle to compile the expression.
      Specified by:
      compile in interface ExpCompiler
      Parameters:
      exp - Expression
      Returns:
      Compiled expression

    • compileAs

      public Calc compileAs(Exp exp, Type resultType, List<ResultStyle> preferredResultTypes)
      Compiles an expression to a given result type.

      If resultType is not null, casts the expression to that type. Throws an exception if that conversion is not allowed by the type system.

      The preferredResultStyles parameter specifies a list of desired result styles. It must not be null, but may be empty. Uses a new ResultStyle to compile the expression.

      Specified by:
      compileAs in interface ExpCompiler
      Parameters:
      exp - Expression
      resultType - Desired result type, or null to use expression's current type
      preferredResultTypes - List of result types, in descending order of preference. Never null.
      Returns:
      Compiled expression, or null if none can satisfy

    • compileMember

      public MemberCalc compileMember(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a Member result.
      Specified by:
      compileMember in interface ExpCompiler

    • compileLevel

      public LevelCalc compileLevel(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a Level result.
      Specified by:
      compileLevel in interface ExpCompiler

    • compileDimension

      public DimensionCalc compileDimension(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a Dimension result.
      Specified by:
      compileDimension in interface ExpCompiler

    • compileHierarchy

      public HierarchyCalc compileHierarchy(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a Hierarchy result.
      Specified by:
      compileHierarchy in interface ExpCompiler

    • compileInteger

      public IntegerCalc compileInteger(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields an int result. The expression is implicitly converted into a scalar.
      Specified by:
      compileInteger in interface ExpCompiler

    • compileString

      public StringCalc compileString(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a String result. The expression is implicitly converted into a scalar.
      Specified by:
      compileString in interface ExpCompiler

    • compileDateTime

      public DateTimeCalc compileDateTime(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a Date result. The expression is implicitly converted into a scalar.
      Specified by:
      compileDateTime in interface ExpCompiler

    • compileList

      public ListCalc compileList(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields an immutable TupleList result.

      Always equivalent to ExpCompiler.compileList(mondrian.olap.Exp)(exp, false).

      Specified by:
      compileList in interface ExpCompiler

    • compileList

      public ListCalc compileList(Exp exp, boolean mutable)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields TupleList result.

      Such an expression is generally a list of Member objects or a list of tuples (each represented by a Member array).

      See ExpCompiler.compileList(mondrian.olap.Exp).

      Specified by:
      compileList in interface ExpCompiler
      Parameters:
      exp - Expression
      mutable - Whether resulting list is mutable

    • toList

      public ListCalc toList(IterCalc calc)
      Converts an iterable over tuples to a list of tuples.
      Parameters:
      calc - Calc
      Returns:
      List calculation.

    • compileIter

      public IterCalc compileIter(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields an immutable Iterable result.
      Specified by:
      compileIter in interface ExpCompiler
      Parameters:
      exp - Expression
      Returns:
      Calculator which yields an Iterable

    • compileBoolean

      public BooleanCalc compileBoolean(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a boolean result.
      Specified by:
      compileBoolean in interface ExpCompiler
      Parameters:
      exp - Expression
      Returns:
      Calculator which yields a boolean

    • compileDouble

      public DoubleCalc compileDouble(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a double result.
      Specified by:
      compileDouble in interface ExpCompiler
      Parameters:
      exp - Expression
      Returns:
      Calculator which yields a double

    • compileTuple

      public TupleCalc compileTuple(Exp exp)
      Description copied from interface: ExpCompiler
      Compiles an expression which yields a tuple result.
      Specified by:
      compileTuple in interface ExpCompiler
      Parameters:
      exp - Expression
      Returns:
      Calculator which yields a tuple

    • compileScalar

      public Calc compileScalar(Exp exp, boolean specific)
      Description copied from interface: ExpCompiler
      Compiles an expression to yield a scalar result.

      If the expression yields a member or tuple, the calculator will automatically apply that member or tuple to the current dimensional context and return the value of the current measure.

      Specified by:
      compileScalar in interface ExpCompiler
      Parameters:
      exp - Expression
      specific - Whether to try to use the specific compile method for scalar types. For example, if specific is true and exp is a string expression, calls ExpCompiler.compileString(mondrian.olap.Exp)
      Returns:
      Calculation which returns the scalar value of the expression

    • registerParameter

      public ParameterSlot registerParameter(Parameter parameter)
      Description copied from interface: ExpCompiler
      Implements a parameter, returning a unique slot which will hold the parameter's value.
      Specified by:
      registerParameter in interface ExpCompiler
      Parameters:
      parameter - Parameter
      Returns:
      Slot

    • getAcceptableResultStyles

      public List<ResultStyle> getAcceptableResultStyles()
      Description copied from interface: ExpCompiler
      Returns a list of the ResultStyles acceptable to the caller.
      Specified by:
      getAcceptableResultStyles in interface ExpCompiler