javassist.expr

Class Expr

java.lang.Object

javassist.expr.Expr

All Implemented Interfaces:

Opcode

Direct Known Subclasses:

Cast, FieldAccess, Handler, Instanceof, MethodCall, NewArray, NewExpr

public abstract class Expr
extends Object
implements Opcode

Expression.

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, 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

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Expr(int pos, CodeIterator i, CtClass declaring, MethodInfo m) Undocumented constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	edited()
protected ConstPool	getConstPool()
CtClass	getEnclosingClass() Returns the class that declares the method enclosing this expression.
String	getFileName() Returns the source file containing the expression.
int	getLineNumber() Returns the line number of the source line containing the expression.
int	indexOfBytecode() Returns the index of the bytecode corresponding to the expression.
protected int	locals()
CtClass[]	mayThrow() Returns the list of exceptions that the expression may throw.
abstract void	replace(String statement) Replaces this expression with the bytecode derived from the given source text.
void	replace(String statement, ExprEditor recursive) Replaces this expression with the bytecode derived from the given source text and ExprEditor.
protected void	replace0(int pos, Bytecode bytecode, int size)
protected void	runEditor(ExprEditor ed, CodeIterator oldIterator)
protected int	stack()
CtBehavior	where() Returns the constructor or method containing the expression.
protected boolean	withinStatic() Returns true if this method is static.

Methods inherited from class java.lang.Object

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

Constructor Detail

Expr

protected Expr(int pos,
    CodeIterator i,
    CtClass declaring,
    MethodInfo m)

Undocumented constructor. Do not use; internal-use only.

Method Detail

getEnclosingClass

public CtClass getEnclosingClass()

Returns the class that declares the method enclosing this expression.

Since:

3.7

getConstPool

protected final ConstPool getConstPool()

edited

protected final boolean edited()

locals

protected final int locals()

stack

protected final int stack()

withinStatic

protected final boolean withinStatic()

Returns true if this method is static.

where

public CtBehavior where()

Returns the constructor or method containing the expression.

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.

indexOfBytecode

public int indexOfBytecode()

Returns the index of the bytecode corresponding to the expression. It is the index into the byte array containing the Java bytecode that implements the method.

getLineNumber

public int getLineNumber()

Returns the line number of the source line containing the expression.

Returns:

-1 if this information is not available.

getFileName

public String getFileName()

Returns the source file containing the expression.

Returns:

null if this information is not available.

replace

public abstract void replace(String statement)
                      throws CannotCompileException

Replaces this expression with the bytecode derived from the given source text.

Parameters:

statement - a Java statement except try-catch.

Throws:

CannotCompileException

replace

public void replace(String statement,
           ExprEditor recursive)
             throws CannotCompileException

Replaces this expression with the bytecode derived from the given source text and ExprEditor.

Parameters:

statement - a Java statement except try-catch.

recursive - if not null, the substituted bytecode is recursively processed by the given ExprEditor.

Throws:

CannotCompileException

Since:

3.1

replace0

protected void replace0(int pos,
            Bytecode bytecode,
            int size)
                 throws BadBytecode

Throws:

BadBytecode

runEditor

protected void runEditor(ExprEditor ed,
             CodeIterator oldIterator)
                  throws CannotCompileException

Throws:

CannotCompileException