Package org.springframework.expression.spel.ast

Class OpPlus

java.lang.Object
org.springframework.expression.spel.ast.SpelNodeImpl
org.springframework.expression.spel.ast.Operator
org.springframework.expression.spel.ast.OpPlus
All Implemented Interfaces:
org.springframework.asm.Opcodes, SpelNode
public class OpPlus extends Operator
The plus operator will:
  • add numbers
  • concatenate strings

It can be used as a unary operator for numbers. The standard promotions are performed when the operand types vary (double+int=double). For other options it defers to the registered overloader.

Since:
3.0
Author:
Andy Clement, Juergen Hoeller, Ivo Smid, Giovanni Dall'Oglio Risso, Sam Brannen

  • Nested Class Summary

    Nested classes/interfaces inherited from class org.springframework.expression.spel.ast.Operator

    Operator.DescriptorComparison

  • Field Summary

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

    leftActualDescriptor, rightActualDescriptor

    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_RECORD, 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, ASM10_EXPERIMENTAL, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9, 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, V16, V17, V18, V19, V20, V21, V9

  • Constructor Summary

    Constructors
    Constructor
    Description
    OpPlus(int startPos, int endPos, SpelNodeImpl... operands)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    generateCode(org.springframework.asm.MethodVisitor mv, CodeFlow cf)
    Generate the bytecode for this node into the supplied visitor.
    SpelNodeImpl
    getRightOperand()
     
    TypedValue
    getValueInternal(ExpressionState state)
     
    boolean
    isCompilable()
    Check whether a node can be compiled to bytecode.
    String
    toStringAST()
    String format for all operators is the same '(' [operand] [operator] [operand] ')'.

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

    equalityCheck, generateComparisonCode, getLeftOperand, getOperatorName, isCompilableOperatorUsingNumerics

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

    generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getStartPosition, getTypedValue, getValue, getValue, getValueRef, isWritable, nextChildIs, setValue, setValueInternal

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • OpPlus

      public OpPlus(int startPos, int endPos, SpelNodeImpl... operands)

  • Method Details

    • getValueInternal

      public TypedValue getValueInternal(ExpressionState state) throws EvaluationException
      Specified by:
      getValueInternal in class SpelNodeImpl
      Throws:
      EvaluationException

    • toStringAST

      public String toStringAST()
      Description copied from class: Operator
      String format for all operators is the same '(' [operand] [operator] [operand] ')'.
      Specified by:
      toStringAST in interface SpelNode
      Overrides:
      toStringAST in class Operator
      Returns:
      the string form

    • getRightOperand

      public SpelNodeImpl getRightOperand()
      Overrides:
      getRightOperand in class Operator

    • isCompilable

      public boolean isCompilable()
      Description copied from class: 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.
      Overrides:
      isCompilable in class SpelNodeImpl
      Returns:
      true if this node can be compiled to bytecode

    • generateCode

      public void generateCode(org.springframework.asm.MethodVisitor mv, CodeFlow cf)
      Description copied from class: 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, e.g. including information about the type of the object currently on the stack.
      Overrides:
      generateCode in class SpelNodeImpl
      Parameters:
      mv - the ASM MethodVisitor into which code should be generated
      cf - a context object with info about what is on the stack