Package javassist.expr

Class FieldAccess

java.lang.Object

javassist.expr.Expr

javassist.expr.FieldAccess

All Implemented Interfaces:

Opcode

public class FieldAccess
extends Expr

Expression for accessing a field.

Field Summary

Fields inherited from interface javassist.bytecode.Opcode

AALOAD, AASTORE, ACONST_NULL, ALOAD, ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DLOAD_0, DLOAD_1, DLOAD_2, DLOAD_3, DMUL, DNEG, DREM, DRETURN, DSTORE, DSTORE_0, DSTORE_1, DSTORE_2, DSTORE_3, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAD_0, FLOAD_1, FLOAD_2, FLOAD_3, FMUL, FNEG, FREM, FRETURN, FSTORE, FSTORE_0, FSTORE_1, FSTORE_2, FSTORE_3, FSUB, GETFIELD, GETSTATIC, GOTO, GOTO_W, 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, ILOAD_0, ILOAD_1, ILOAD_2, ILOAD_3, IMUL, INEG, INSTANCEOF, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISTORE_0, ISTORE_1, ISTORE_2, ISTORE_3, ISUB, IUSHR, IXOR, JSR, JSR_W, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDC_W, LDC2_W, LDIV, LLOAD, LLOAD_0, LLOAD_1, LLOAD_2, LLOAD_3, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSTORE_0, LSTORE_1, LSTORE_2, LSTORE_3, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, STACK_GROW, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, WIDE

Method Summary

Modifier and Type	Method	Description
String	getClassName()	Returns the name of the class in which the field is declared.
CtField	getField()	Returns the field accessed by this expression.
String	getFieldName()	Returns the name of the field.
String	getFileName()	Returns the source file containing the field access.
int	getLineNumber()	Returns the line number of the source line containing the field access.
String	getSignature()	Returns the signature of the field type.
boolean	isReader()	Returns true if the field is read.
boolean	isStatic()	Returns true if the field is static.
boolean	isWriter()	Returns true if the field is written in.
CtClass[]	mayThrow()	Returns the list of exceptions that the expression may throw.
void	replace(String statement)	Replaces the method call with the bytecode derived from the given source text.
CtBehavior	where()	Returns the method or constructor containing the field-access expression represented by this object.

Methods inherited from class javassist.expr.Expr

getEnclosingClass, indexOfBytecode, replace

Methods inherited from class java.lang.Object

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

Method Details

where

public CtBehavior where()

Returns the method or constructor containing the field-access expression represented by this object.

Overrides:

where in class Expr

getLineNumber

public int getLineNumber()

Returns the line number of the source line containing the field access.

Overrides:

getLineNumber in class Expr

Returns:

-1 if this information is not available.

getFileName

public String getFileName()

Returns the source file containing the field access.

Overrides:

getFileName in class Expr

Returns:

null if this information is not available.

isStatic

public boolean isStatic()

Returns true if the field is static.

isReader

public boolean isReader()

Returns true if the field is read.

isWriter

public boolean isWriter()

Returns true if the field is written in.

getClassName

public String getClassName()

Returns the name of the class in which the field is declared.

getFieldName

public String getFieldName()

Returns the name of the field.

getField

public CtField getField()
                 throws NotFoundException

Returns the field accessed by this expression.

Throws:

NotFoundException

mayThrow

public CtClass[] mayThrow()

Returns the list of exceptions that the expression may throw. This list includes both the exceptions that the try-catch statements including the expression can catch and the exceptions that the throws declaration allows the method to throw.

Overrides:

mayThrow in class Expr

getSignature

public String getSignature()

Returns the signature of the field type. The signature is represented by a character string called field descriptor, which is defined in the JVM specification.

Since:

3.1

See Also:

• Descriptor.toCtClass(String, ClassPool)

replace

public void replace(String statement)
             throws CannotCompileException

Replaces the method call with the bytecode derived from the given source text.

$0 is available even if the called method is static. If the field access is writing, $_ is available but the value of $_ is ignored.

Specified by:

replace in class Expr

Parameters:

statement - a Java statement except try-catch.

Throws:

CannotCompileException