org.springframework.expression.spel.ast
Class Selection

java.lang.Object
  org.antlr.runtime.tree.BaseTree
      org.antlr.runtime.tree.CommonTree
          org.springframework.expression.spel.ast.SpelNodeImpl
              org.springframework.expression.spel.ast.Selection

All Implemented Interfaces:

java.io.Serializable, org.antlr.runtime.tree.Tree, CommonTypeDescriptors, SpelNode

public class Selection
extends SpelNodeImpl

Represents selection over a map or collection. For example: {1,2,3,4,5,6,7,8,9,10}.?{#isEven(#this) == 'y'} returns [2, 4, 6, 8, 10] Basically a subset of the input data is returned based on the evaluation of the expression supplied as selection criteria.

Author:

Andy Clement

See Also:

Serialized Form

Field Summary

static int	ALL
static int	FIRST
static int	LAST

Fields inherited from class org.antlr.runtime.tree.CommonTree

startIndex, stopIndex, token

Fields inherited from class org.antlr.runtime.tree.BaseTree

children

Fields inherited from interface org.springframework.expression.spel.ast.CommonTypeDescriptors

BOOLEAN_TYPE_DESCRIPTOR, BYTE_TYPE_DESCRIPTOR, CHARACTER_TYPE_DESCRIPTOR, CLASS_TYPE_DESCRIPTOR, DOUBLE_TYPE_DESCRIPTOR, FLOAT_TYPE_DESCRIPTOR, INTEGER_TYPE_DESCRIPTOR, LONG_TYPE_DESCRIPTOR, OBJECT_TYPE_DESCRIPTOR, SHORT_TYPE_DESCRIPTOR, STRING_TYPE_DESCRIPTOR

Fields inherited from interface org.antlr.runtime.tree.Tree

INVALID_NODE

Constructor Summary

Selection(org.antlr.runtime.Token payload, int variant)

Method Summary

TypedValue	getValueInternal(ExpressionState state)
java.lang.String	toStringAST()

Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl

getChild, getObjectClass, getStartPosition, getTokenName, getValue, getValue, isWritable, setValue

Methods inherited from class org.antlr.runtime.tree.CommonTree

dupNode, getCharPositionInLine, getLine, getText, getToken, getTokenStartIndex, getTokenStopIndex, getType, isNil, setTokenStartIndex, setTokenStopIndex, toString

Methods inherited from class org.antlr.runtime.tree.BaseTree

addChild, addChildren, createChildrenList, deleteChild, dupTree, getChildCount, getFirstChildWithType, setChild, toStringTree

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.expression.spel.SpelNode

getChildCount

Field Detail

ALL

public static final int ALL

See Also:

Constant Field Values

FIRST

public static final int FIRST

See Also:

Constant Field Values

LAST

public static final int LAST

See Also:

Constant Field Values

Constructor Detail

Selection

public Selection(org.antlr.runtime.Token payload,
                 int variant)

Method Detail

getValueInternal

public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException

Specified by:

getValueInternal in class SpelNodeImpl

Throws:

EvaluationException

toStringAST

public java.lang.String toStringAST()

Specified by:

toStringAST in interface SpelNode

Specified by:

toStringAST in class SpelNodeImpl

Returns:

the string form of this AST node