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

所有已实现的接口:
Opcodes, SpelNode
```
public class FunctionReference
extends SpelNodeImpl
```
A function reference is of the form "#someFunction(a,b,c)". Functions may be defined in the context prior to the expression being evaluated. Functions may also be static Java methods, registered in the context prior to invocation of the expression.
Functions are very simplistic. The arguments are not part of the definition (right now), so the names must be unique.
从以下版本开始:
3.0
作者:
Andy Clement, Juergen Hoeller

字段概要
- 从类继承的字段 org.springframework.expression.spel.ast.SpelNodeImpl
  children, exitTypeDescriptor, pos
- 从接口继承的字段 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, 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, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V1_9

构造器概要
构造器
构造器说明
FunctionReference(String functionName, int pos, SpelNodeImpl... arguments)

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`generateCode(MethodVisitor mv, CodeFlow cf)`	Generate the bytecode for this node into the supplied visitor.
`TypedValue`	`getValueInternal(ExpressionState state)`
`boolean`	`isCompilable()`	Check whether a node can be compiled to bytecode.
`String`	`toStringAST()`

从类继承的方法 org.springframework.expression.spel.ast.SpelNodeImpl
generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, getValueRef, isWritable, nextChildIs, setValue

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - FunctionReference
```
public FunctionReference(String functionName,
                         int pos,
                         SpelNodeImpl... arguments)
```
- 方法详细资料
  - getValueInternal
```
public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException
```
    指定者:
    getValueInternal 在类中 SpelNodeImpl
    抛出:
    EvaluationException
  - toStringAST
```
public String toStringAST()
```
    返回:
    the string form of this AST node
  - isCompilable
```
public boolean isCompilable()
```
    从类复制的说明: SpelNodeImpl
    Check whether a node can be compiled to bytecode. The reasoning in each node may be different but will typically involve checking whether the exit type descriptor of the node is known and any relevant child nodes are compilable.
    覆盖:
    isCompilable 在类中 SpelNodeImpl
    返回:
    true if this node can be compiled to bytecode
  - generateCode
```
public void generateCode(MethodVisitor mv,
                         CodeFlow cf)
```
    从类复制的说明: SpelNodeImpl
    Generate the bytecode for this node into the supplied visitor. Context info about the current expression being compiled is available in the codeflow object. For example it will include information about the type of the object currently on the stack.
    覆盖:
    generateCode 在类中 SpelNodeImpl
    参数:
    mv - the ASM MethodVisitor into which code should be generated
    cf - a context object with info about what is on the stack

类 FunctionReference

字段概要

从类继承的字段 org.springframework.expression.spel.ast.SpelNodeImpl

从接口继承的字段 org.springframework.asm.Opcodes

构造器概要

方法概要

从类继承的方法 org.springframework.expression.spel.ast.SpelNodeImpl

从类继承的方法 java.lang.Object

构造器详细资料

FunctionReference

方法详细资料

getValueInternal

toStringAST

isCompilable

generateCode