Package 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

Modifier and Type	Field	Description
(package private) int	currentPos
(package private) boolean	edited
(package private) CodeIterator	iterator
(package private) static final String	javaLangObject
(package private) int	maxLocals
(package private) int	maxStack
(package private) CtClass	thisClass
(package private) MethodInfo	thisMethod

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
private static void	addClass(List<CtClass> list, CtClass c)
(package private) static final boolean	checkResultValue(CtClass retType, String prog)
protected final boolean	edited()
protected final 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 final 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 final int	stack()
(package private) static final void	storeStack(CtClass[] params, boolean isStaticCall, int regno, Bytecode bytecode)
private static void	storeStack0(int i, int n, CtClass[] params, int regno, Bytecode bytecode)
CtBehavior	where()	Returns the constructor or method containing the expression.
protected final 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

Field Details

currentPos

int currentPos

iterator

CodeIterator iterator

thisClass

CtClass thisClass

thisMethod

MethodInfo thisMethod

edited

boolean edited

maxLocals

int maxLocals

maxStack

int maxStack

javaLangObject

static final String javaLangObject

See Also:

• Constant Field Values

Constructor Details

Expr

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

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

Method Details

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.

addClass

private static void addClass(List<CtClass> list,
 CtClass c)

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.

checkResultValue

static final boolean checkResultValue(CtClass retType,
 String prog)
                               throws CannotCompileException

Throws:

CannotCompileException

storeStack

static final void storeStack(CtClass[] params,
 boolean isStaticCall,
 int regno,
 Bytecode bytecode)

storeStack0

private static void storeStack0(int i,
 int n,
 CtClass[] params,
 int regno,
 Bytecode bytecode)

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