java.lang.Object
- org.springframework.expression.spel.ast.SpelNodeImpl
- - org.springframework.expression.spel.ast.Selection

All Implemented Interfaces:
Opcodes, 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.
Since:
3.0
Author:
Andy Clement, Mark Fisher, Sam Brannen, Juergen Hoeller

Field Summary
Fields
Modifier and Type Field Description
static int ALL
All items (?[]).
static int FIRST
The first item (^[]).
static int LAST
The last item ($[]).
- Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
  children, exitTypeDescriptor
- Fields inherited from interface org.springframework.asm.Opcodes
  AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM4, ASM5, ASM6, ASM7, ASM8_EXPERIMENTAL, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V9

Constructor Summary
Constructors
Constructor Description
Selection(boolean nullSafe, int variant, int startPos, int endPos, SpelNodeImpl expression)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`TypedValue`	`getValueInternal(ExpressionState state)`
`protected ValueRef`	`getValueRef(ExpressionState state)`
`String`	`toStringAST()`	Return the string form the this AST node.

Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
generateCode, generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getStartPosition, getTypedValue, getValue, getValue, isCompilable, isWritable, nextChildIs, setValue

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- ALL
```
public static final int ALL
```
  All items (?[]).
  See Also:
  Constant Field Values
- FIRST
```
public static final int FIRST
```
  The first item (^[]).
  See Also:
  Constant Field Values
- LAST
```
public static final int LAST
```
  The last item ($[]).
  See Also:
  Constant Field Values

Constructor Detail

Selection

public Selection(boolean nullSafe,
                 int variant,
                 int startPos,
                 int endPos,
                 SpelNodeImpl expression)

Method Detail
- getValueInternal
```
public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException
```
  Specified by:
  getValueInternal in class SpelNodeImpl
  Throws:
  EvaluationException
- getValueRef
```
protected ValueRef getValueRef(ExpressionState state)
                        throws EvaluationException
```
  Overrides:
  getValueRef in class SpelNodeImpl
  Throws:
  EvaluationException
- toStringAST
```
public String toStringAST()
```
  Description copied from interface: SpelNode
  Return the string form the this AST node.
  Returns:
  the string form

Modifier and Type	Field	Description
`static int`	`ALL`	All items (`?[]`).
`static int`	`FIRST`	The first item (`^[]`).
`static int`	`LAST`	The last item (`$[]`).

Class Selection

Field Summary

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

Fields inherited from interface org.springframework.asm.Opcodes

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

Field Detail

ALL

FIRST

LAST

Constructor Detail

Selection

Method Detail

getValueInternal

getValueRef

toStringAST