org.apache.calcite.linq4j.tree

Class Expression

java.lang.Object

org.apache.calcite.linq4j.tree.AbstractNode

org.apache.calcite.linq4j.tree.Expression

All Implemented Interfaces:

Node

Direct Known Subclasses:

BinaryExpression, ConstantExpression, DefaultExpression, DynamicExpression, IndexExpression, InvocationExpression, LambdaExpression, ListInitExpression, MemberExpression, MemberInitExpression, MethodCallExpression, NewArrayExpression, NewExpression, ParameterExpression, TernaryExpression, TypeBinaryExpression, UnaryExpression

public abstract class Expression
extends AbstractNode

Analogous to LINQ's System.Linq.Expression.

Field Summary

Fields inherited from class org.apache.calcite.linq4j.tree.AbstractNode

nodeType, type

Constructor Summary

Constructors

Constructor and Description
Expression(ExpressionType nodeType, Type type) Creates an Expression.

Method Summary

Methods

Modifier and Type	Method and Description
abstract Expression	accept(Visitor visitor)
boolean	canReduce() Indicates that the node can be reduced to a simpler node.

Methods inherited from class org.apache.calcite.linq4j.tree.AbstractNode

accept, equals, evaluate, getNodeType, getType, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Expression

public Expression(ExpressionType nodeType,
          Type type)

Creates an Expression.

The type of the expression may, at the caller's discretion, be a regular class (because Class implements Type) or it may be a different implementation that retains information about type parameters.

Parameters:

nodeType - Node type

type - Type of the expression

Method Detail

accept

public abstract Expression accept(Visitor visitor)

Specified by:

accept in interface Node

Overrides:

accept in class AbstractNode

canReduce

public boolean canReduce()

Indicates that the node can be reduced to a simpler node. If this returns true, Reduce() can be called to produce the reduced form.