Package javassist.compiler

Class TypeChecker

java.lang.Object

javassist.compiler.ast.Visitor

javassist.compiler.TypeChecker

All Implemented Interfaces:

Opcode, TokenId

Direct Known Subclasses:

JvstTypeChecker

public class TypeChecker
extends Visitor
implements Opcode, TokenId

Field Summary

Fields

Modifier and Type	Field	Description
protected int	arrayDim
protected String	className
protected int	exprType
(package private) static final String	javaLangObject
(package private) static final String	jvmJavaLangClass
(package private) static final String	jvmJavaLangObject
(package private) static final String	jvmJavaLangString
protected MemberResolver	resolver
protected CtClass	thisClass
protected 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

Fields inherited from interface javassist.compiler.TokenId

ABSTRACT, AND_E, ANDAND, ARRAY, ARSHIFT, ARSHIFT_E, assignOps, BadToken, BLOCK, BOOLEAN, BREAK, BYTE, CALL, CASE, CATCH, CHAR, CharConstant, CLASS, CONST, CONTINUE, DECL, DEFAULT, DIV_E, DO, DOUBLE, DoubleConstant, ELSE, EQ, EXOR_E, EXPR, EXTENDS, FALSE, FINAL, FINALLY, FLOAT, FloatConstant, FOR, GE, GOTO, Identifier, IF, IMPLEMENTS, IMPORT, INSTANCEOF, INT, IntConstant, INTERFACE, LABEL, LE, LONG, LongConstant, LSHIFT, LSHIFT_E, MEMBER, MINUS_E, MINUSMINUS, MOD_E, MUL_E, NATIVE, NEQ, NEW, NULL, opNames, OR_E, OROR, PACKAGE, PLUS_E, PLUSPLUS, PRIVATE, PROTECTED, PUBLIC, RETURN, RSHIFT, RSHIFT_E, SHORT, STATIC, STRICT, StringL, SUPER, SWITCH, SYNCHRONIZED, THIS, THROW, THROWS, TRANSIENT, TRUE, TRY, VOID, VOLATILE, WHILE

Constructor Summary

Constructors

Constructor	Description
TypeChecker(CtClass cc, ClassPool cp)

Method Summary

Modifier and Type	Method	Description
protected static String	argTypesToString(int[] types, int[] dims, String[] cnames)
private void	atArrayAssign(Expr expr, int op, Expr array, ASTree right)
void	atArrayInit(ArrayInit init)
void	atArrayLength(Expr expr)
void	atArrayRead(ASTree array, ASTree index)
void	atAssignExpr(AssignExpr expr)
void	atBinExpr(BinExpr expr)
void	atCallExpr(CallExpr expr)
void	atCastExpr(CastExpr expr)
void	atClassObject(Expr expr)
void	atCondExpr(CondExpr expr)
void	atDoubleConst(DoubleConst d)
void	atExpr(Expr expr)
protected void	atFieldAssign(Expr expr, int op, ASTree left, ASTree right)
protected void	atFieldPlusPlus(ASTree oprand)
private void	atFieldRead(ASTree expr)
private void	atFieldRead(CtField f)
void	atInstanceOfExpr(InstanceOfExpr expr)
void	atIntConst(IntConst i)
void	atKeyword(Keyword k)
void	atMember(Member mem)
void	atMethodArgs(ASTList args, int[] types, int[] dims, String[] cnames)
MemberResolver.Method	atMethodCallCore(CtClass targetClass, String mname, ASTList args)
protected void	atMultiNewArray(int type, ASTList classname, ASTList size)
void	atNewArrayExpr(NewExpr expr)
void	atNewExpr(NewExpr expr)
private Expr	atPlusExpr(BinExpr expr)
private void	atPlusPlus(int token, ASTree oprand, Expr expr)
void	atStringL(StringL s)
void	atVariable(Variable v)
private void	atVariableAssign(Expr expr, int op, Variable var, Declarator d, ASTree right)
private static void	badMethod()
private void	booleanExpr(ASTree expr)
private void	computeBinExprType(BinExpr expr, int token, int type1)
protected static void	fatal()
protected CtField	fieldAccess(ASTree expr)
private CtField	fieldAccess2(Expr e, String jvmClassName)
private static ASTree	getConstantFieldValue(Member mem)	If MEM is a static final field, this method returns a constant expression representing the value of that field.
static ASTree	getConstantFieldValue(CtField f)
int	getMethodArgsLength(ASTList args)
protected String	getSuperName()	Returns the JVM-internal representation of this super class name.
protected String	getThisName()	Returns the JVM-internal representation of this class name.
private void	insertCast(BinExpr expr, int type1, int type2)
private boolean	isConstant(BinExpr expr, int op, ASTree left, ASTree right)
private boolean	isConstant(Expr expr, int op, ASTree oprand)
(package private) static String	isDotSuper(ASTree target)	Returns non-null if target is something like Foo.super for accessing the default method in an interface.
private static boolean	isPlusExpr(ASTree expr)
private static Expr	makeAppendCall(ASTree target, ASTree arg)
protected String	resolveClassName(String jvmName)
protected String	resolveClassName(ASTList name)
(package private) void	setReturnType(String desc)
void	setThisMethod(MethodInfo m)	Records the currently compiled method.
(package private) static ASTree	stripPlusExpr(ASTree expr)
protected static StringBuilder	typeToString(StringBuilder sbuf, int type, int dim, String cname)

Methods inherited from class javassist.compiler.ast.Visitor

atASTList, atDeclarator, atFieldDecl, atMethodDecl, atPair, atStmnt, atSymbol

Methods inherited from class java.lang.Object

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

Field Details

javaLangObject

static final String javaLangObject

See Also:

• Constant Field Values

jvmJavaLangObject

static final String jvmJavaLangObject

See Also:

• Constant Field Values

jvmJavaLangString

static final String jvmJavaLangString

See Also:

• Constant Field Values

jvmJavaLangClass

static final String jvmJavaLangClass

See Also:

• Constant Field Values

exprType

protected int exprType

arrayDim

protected int arrayDim

className

protected String className

resolver

protected MemberResolver resolver

thisClass

protected CtClass thisClass

thisMethod

protected MethodInfo thisMethod

Constructor Details

TypeChecker

public TypeChecker(CtClass cc,
 ClassPool cp)

Method Details

argTypesToString

protected static String argTypesToString(int[] types,
 int[] dims,
 String[] cnames)

typeToString

protected static StringBuilder typeToString(StringBuilder sbuf,
 int type,
 int dim,
 String cname)

setThisMethod

public void setThisMethod(MethodInfo m)

Records the currently compiled method.

fatal

protected static void fatal()
                     throws CompileError

Throws:

CompileError

getThisName

protected String getThisName()

Returns the JVM-internal representation of this class name.

getSuperName

protected String getSuperName()
                       throws CompileError

Returns the JVM-internal representation of this super class name.

Throws:

CompileError

resolveClassName

protected String resolveClassName(ASTList name)
                           throws CompileError

Throws:

CompileError

resolveClassName

protected String resolveClassName(String jvmName)
                           throws CompileError

Throws:

CompileError

atNewExpr

public void atNewExpr(NewExpr expr)
               throws CompileError

Overrides:

atNewExpr in class Visitor

Throws:

CompileError

atNewArrayExpr

public void atNewArrayExpr(NewExpr expr)
                    throws CompileError

Throws:

CompileError

atArrayInit

public void atArrayInit(ArrayInit init)
                 throws CompileError

Overrides:

atArrayInit in class Visitor

Throws:

CompileError

atMultiNewArray

protected void atMultiNewArray(int type,
 ASTList classname,
 ASTList size)
                        throws CompileError

Throws:

CompileError

atAssignExpr

public void atAssignExpr(AssignExpr expr)
                  throws CompileError

Overrides:

atAssignExpr in class Visitor

Throws:

CompileError

atVariableAssign

private void atVariableAssign(Expr expr,
 int op,
 Variable var,
 Declarator d,
 ASTree right)
                       throws CompileError

Throws:

CompileError

atArrayAssign

private void atArrayAssign(Expr expr,
 int op,
 Expr array,
 ASTree right)
                    throws CompileError

Throws:

CompileError

atFieldAssign

protected void atFieldAssign(Expr expr,
 int op,
 ASTree left,
 ASTree right)
                      throws CompileError

Throws:

CompileError

atCondExpr

public void atCondExpr(CondExpr expr)
                throws CompileError

Overrides:

atCondExpr in class Visitor

Throws:

CompileError

atBinExpr

public void atBinExpr(BinExpr expr)
               throws CompileError

Overrides:

atBinExpr in class Visitor

Throws:

CompileError

atPlusExpr

private Expr atPlusExpr(BinExpr expr)
                 throws CompileError

Throws:

CompileError

isConstant

private boolean isConstant(BinExpr expr,
 int op,
 ASTree left,
 ASTree right)
                    throws CompileError

Throws:

CompileError

stripPlusExpr

static ASTree stripPlusExpr(ASTree expr)

getConstantFieldValue

private static ASTree getConstantFieldValue(Member mem)

If MEM is a static final field, this method returns a constant expression representing the value of that field.

getConstantFieldValue

public static ASTree getConstantFieldValue(CtField f)

isPlusExpr

private static boolean isPlusExpr(ASTree expr)

makeAppendCall

private static Expr makeAppendCall(ASTree target,
 ASTree arg)

computeBinExprType

private void computeBinExprType(BinExpr expr,
 int token,
 int type1)
                         throws CompileError

Throws:

CompileError

booleanExpr

private void booleanExpr(ASTree expr)
                  throws CompileError

Throws:

CompileError

insertCast

private void insertCast(BinExpr expr,
 int type1,
 int type2)
                 throws CompileError

Throws:

CompileError

atCastExpr

public void atCastExpr(CastExpr expr)
                throws CompileError

Overrides:

atCastExpr in class Visitor

Throws:

CompileError

atInstanceOfExpr

public void atInstanceOfExpr(InstanceOfExpr expr)
                      throws CompileError

Overrides:

atInstanceOfExpr in class Visitor

Throws:

CompileError

atExpr

public void atExpr(Expr expr)
            throws CompileError

Overrides:

atExpr in class Visitor

Throws:

CompileError

isConstant

private boolean isConstant(Expr expr,
 int op,
 ASTree oprand)

atCallExpr

public void atCallExpr(CallExpr expr)
                throws CompileError

Overrides:

atCallExpr in class Visitor

Throws:

CompileError

badMethod

private static void badMethod()
                       throws CompileError

Throws:

CompileError

isDotSuper

static String isDotSuper(ASTree target)

Returns non-null if target is something like Foo.super for accessing the default method in an interface. Otherwise, null.

Returns:

the class name followed by .super or null.

atMethodCallCore

public MemberResolver.Method atMethodCallCore(CtClass targetClass,
 String mname,
 ASTList args)
                                       throws CompileError

Returns:

a pair of the class declaring the invoked method and the MethodInfo of that method. Never null.

Throws:

CompileError

getMethodArgsLength

public int getMethodArgsLength(ASTList args)

atMethodArgs

public void atMethodArgs(ASTList args,
 int[] types,
 int[] dims,
 String[] cnames)
                  throws CompileError

Throws:

CompileError

setReturnType

void setReturnType(String desc)
            throws CompileError

Throws:

CompileError

atFieldRead

private void atFieldRead(ASTree expr)
                  throws CompileError

Throws:

CompileError

atFieldRead

private void atFieldRead(CtField f)
                  throws CompileError

Throws:

CompileError

fieldAccess

protected CtField fieldAccess(ASTree expr)
                       throws CompileError

Throws:

CompileError

fieldAccess2

private CtField fieldAccess2(Expr e,
 String jvmClassName)
                      throws CompileError

Throws:

CompileError

atClassObject

public void atClassObject(Expr expr)
                   throws CompileError

Throws:

CompileError

atArrayLength

public void atArrayLength(Expr expr)
                   throws CompileError

Throws:

CompileError

atArrayRead

public void atArrayRead(ASTree array,
 ASTree index)
                 throws CompileError

Throws:

CompileError

atPlusPlus

private void atPlusPlus(int token,
 ASTree oprand,
 Expr expr)
                 throws CompileError

Throws:

CompileError

atFieldPlusPlus

protected void atFieldPlusPlus(ASTree oprand)
                        throws CompileError

Throws:

CompileError

atMember

public void atMember(Member mem)
              throws CompileError

Overrides:

atMember in class Visitor

Throws:

CompileError

atVariable

public void atVariable(Variable v)
                throws CompileError

Overrides:

atVariable in class Visitor

Throws:

CompileError

atKeyword

public void atKeyword(Keyword k)
               throws CompileError

Overrides:

atKeyword in class Visitor

Throws:

CompileError

atStringL

public void atStringL(StringL s)
               throws CompileError

Overrides:

atStringL in class Visitor

Throws:

CompileError

atIntConst

public void atIntConst(IntConst i)
                throws CompileError

Overrides:

atIntConst in class Visitor

Throws:

CompileError

atDoubleConst

public void atDoubleConst(DoubleConst d)
                   throws CompileError

Overrides:

atDoubleConst in class Visitor

Throws:

CompileError