mjc

org.multijava.mjc
Class JTryFinallyStatement

java.lang.Object
  extended byorg.multijava.util.Utils
      extended byorg.multijava.util.compiler.Phylum
          extended byorg.multijava.mjc.JPhylum
              extended byorg.multijava.mjc.JStatement
                  extended byorg.multijava.mjc.JTryFinallyStatement
All Implemented Interfaces:
Cloneable, Constants, Constants, PhylumType

public class JTryFinallyStatement
extends JStatement

This class represents a try-catch statement in the AST. JLS2 14.19: Try Statement

A try statement executes a block. If a value is thrown and the try statement has one or more catch clauses that can catch it, then control will be transferred to the first such catch clause. If the try statement has a finally clause, then another block of code is executed, no matter whether the try block completes normally or abruptly, and no matter whether a catch clause is first given control.

In this implementation, the Try Statement is split into a Try-Catch Statement and a Try-Finally Statement. A Try Statement where both catch and finally clauses are present is rewritten as a Try-Catch Statement enclosed in a Try-Finally Statement.


Field Summary
private  JBlock finallyClause
           
private  CodeLabel finallyLabel
           
private  JLocalVariable finallyVar
           
private  boolean generatingFinallyClause
          Set to true while invoking finallyClause.genCode(), this flag is used to prevent recursive jsrs to finallyClause
private  JLocalVariable localVar
           
private  JLocalVariable returnVar
           
private  JBlock tryClause
           
 
Fields inherited from class org.multijava.mjc.JStatement
 
Fields inherited from class org.multijava.mjc.JPhylum
EMPTY
 
Fields inherited from class org.multijava.util.compiler.Phylum
 
Fields inherited from class org.multijava.util.Utils
DBG_LEVEL_HIGH, DBG_LEVEL_LOW, DBG_LEVEL_NO
 
Fields inherited from interface org.multijava.mjc.Constants
ACC_MODIFIER_FLAGS_MASK, ACC_NON_NULL, ACC_NON_NULL_BY_DEFAULT, ACC_NULLABLE, ACC_NULLABLE_BY_DEFAULT, ACC_PURE, ACCESS_FLAG_ARRAY, ACCESS_FLAG_NAMES, AMID_JAVA_MATH, AMID_MAX, AMID_SAFE_MATH, CMP_VERSION, IMPLICITLY_NON_NULL, JAV_ASSERTION_ERROR, JAV_CLASS, JAV_CLASSLOADER, JAV_CLASSNOTFOUND_EXCEPTION, JAV_CLONE, JAV_CLONEABLE, JAV_CONSTRUCTOR, JAV_ERROR, JAV_EXCEPTION, JAV_INIT, JAV_LENGTH, JAV_NAME_SEPARATOR, JAV_NOCLASSDEFFOUND_ERROR, JAV_OBJECT, JAV_OUTER_THIS, JAV_RMJ_RUNTIME_EXCEPTION, JAV_RUNTIME, JAV_RUNTIME_EXCEPTION, JAV_SERIALIZABLE, JAV_STATIC_INIT, JAV_STRING, JAV_STRINGBUFFER, JAV_SUPER, JAV_THIS, JAV_THROWABLE, MJ_ANCHOR, NULLITY_MODS, OPE_BAND, OPE_BNOT, OPE_BOR, OPE_BSR, OPE_BXOR, OPE_EQ, OPE_GE, OPE_GT, OPE_LAND, OPE_LE, OPE_LNOT, OPE_LOR, OPE_LT, OPE_MINUS, OPE_NE, OPE_PERCENT, OPE_PLUS, OPE_POSTDEC, OPE_POSTINC, OPE_PREDEC, OPE_PREINC, OPE_SIMPLE, OPE_SL, OPE_SLASH, OPE_SR, OPE_STAR, TID_ARRAY, TID_BOOLEAN, TID_BYTE, TID_CHAR, TID_CLASS, TID_DOUBLE, TID_FLOAT, TID_INT, TID_LONG, TID_MAX, TID_SHORT, TID_VOID, UNIV_ARRAY_TMP, UNIV_TMP
 
Fields inherited from interface org.multijava.util.classfile.Constants
ACC_ABSTRACT, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VOLATILE, ATT_ANCHOR, ATT_BRIDGE, ATT_CODE, ATT_CONSTANTVALUE, ATT_DEPRECATED, ATT_DISPATCHER, ATT_EXCEPTIONS, ATT_GENERIC, ATT_GENERIC_FUNCTIONS, ATT_INNERCLASSES, ATT_LINENUMBERTABLE, ATT_LOCALVARIABLETABLE, ATT_MM_BODY, ATT_REDIRECTOR, ATT_RMJ_GLUE, ATT_RMJ_SIGNATURE, ATT_RUNTIME_VISIBLE_ANNOTATIONS, ATT_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, ATT_SIGNATURE, ATT_SOURCEFILE, ATT_SYNTHETIC, ATT_UNIVERSE_FIELD, ATT_UNIVERSE_METHOD, ATT_UNIVERSE_VERSION, CST_CLASS, CST_DOUBLE, CST_FIELD, CST_FLOAT, CST_INTEGER, CST_INTERFACEMETHOD, CST_LONG, CST_METHOD, CST_NAMEANDTYPE, CST_STRING, CST_UTF8, ENV_DEBUG_MODE, ENV_USE_CACHE, JAVA_MAGIC, JAVA_MAJOR, JAVA_MINOR, MAX_CODE_PER_METHOD, opc_aaload, opc_aastore, opc_aconst_null, opc_aload, opc_aload_0, opc_aload_1, opc_aload_2, opc_aload_3, opc_anewarray, opc_areturn, opc_arraylength, opc_astore, opc_astore_0, opc_astore_1, opc_astore_2, opc_astore_3, opc_athrow, opc_baload, opc_bastore, opc_bipush, opc_caload, opc_castore, opc_checkcast, opc_d2f, opc_d2i, opc_d2l, opc_dadd, opc_daload, opc_dastore, opc_dcmpg, opc_dcmpl, opc_dconst_0, opc_dconst_1, opc_ddiv, opc_dload, opc_dload_0, opc_dload_1, opc_dload_2, opc_dload_3, opc_dmul, opc_dneg, opc_drem, opc_dreturn, opc_dstore, opc_dstore_0, opc_dstore_1, opc_dstore_2, opc_dstore_3, opc_dsub, opc_dup, opc_dup2, opc_dup2_x1, opc_dup2_x2, opc_dup_x1, opc_dup_x2, opc_f2d, opc_f2i, opc_f2l, opc_fadd, opc_faload, opc_fastore, opc_fcmpg, opc_fcmpl, opc_fconst_0, opc_fconst_1, opc_fconst_2, opc_fdiv, opc_fload, opc_fload_0, opc_fload_1, opc_fload_2, opc_fload_3, opc_fmul, opc_fneg, opc_frem, opc_freturn, opc_fstore, opc_fstore_0, opc_fstore_1, opc_fstore_2, opc_fstore_3, opc_fsub, opc_getfield, opc_getstatic, opc_goto, opc_goto_w, opc_i2b, opc_i2c, opc_i2d, opc_i2f, opc_i2l, opc_i2s, opc_iadd, opc_iaload, opc_iand, opc_iastore, opc_iconst_0, opc_iconst_1, opc_iconst_2, opc_iconst_3, opc_iconst_4, opc_iconst_5, opc_iconst_m1, opc_idiv, opc_if_acmpeq, opc_if_acmpne, opc_if_icmpeq, opc_if_icmpge, opc_if_icmpgt, opc_if_icmple, opc_if_icmplt, opc_if_icmpne, opc_ifeq, opc_ifge, opc_ifgt, opc_ifle, opc_iflt, opc_ifne, opc_ifnonnull, opc_ifnull, opc_iinc, opc_iload, opc_iload_0, opc_iload_1, opc_iload_2, opc_iload_3, opc_imul, opc_ineg, opc_instanceof, opc_invokeinterface, opc_invokespecial, opc_invokestatic, opc_invokevirtual, opc_ior, opc_irem, opc_ireturn, opc_ishl, opc_ishr, opc_istore, opc_istore_0, opc_istore_1, opc_istore_2, opc_istore_3, opc_isub, opc_iushr, opc_ixor, opc_jsr, opc_jsr_w, opc_l2d, opc_l2f, opc_l2i, opc_ladd, opc_laload, opc_land, opc_lastore, opc_lcmp, opc_lconst_0, opc_lconst_1, opc_ldc, opc_ldc2_w, opc_ldc_w, opc_ldiv, opc_lload, opc_lload_0, opc_lload_1, opc_lload_2, opc_lload_3, opc_lmul, opc_lneg, opc_lookupswitch, opc_lor, opc_lrem, opc_lreturn, opc_lshl, opc_lshr, opc_lstore, opc_lstore_0, opc_lstore_1, opc_lstore_2, opc_lstore_3, opc_lsub, opc_lushr, opc_lxor, opc_monitorenter, opc_monitorexit, opc_multianewarray, opc_new, opc_newarray, opc_nop, opc_pop, opc_pop2, opc_putfield, opc_putstatic, opc_ret, opc_return, opc_saload, opc_sastore, opc_sipush, opc_swap, opc_tableswitch, opc_wide, opc_xxxunusedxxx, POO_ASCII_CONSTANT, POO_CLASS_CONSTANT, POO_DOUBLE_CONSTANT, POO_FLOAT_CONSTANT, POO_INTEGER_CONSTANT, POO_LONG_CONSTANT, POO_NAT_CONSTANT, POO_REF_CONSTANT, POO_STRING_CONSTANT, TYP_ADDRESS, TYP_DOUBLE, TYP_FLOAT, TYP_INT, TYP_LONG, TYP_REFERENCE, TYP_VOID
 
Constructor Summary
JTryFinallyStatement(TokenReference where, JBlock tryClause, JBlock finallyClause, JavaStyleComment[] comments)
          Construct a node in the parsing tree
 
Method Summary
 void accept(MjcVisitor p)
          Accepts the specified visitor
 JBlock finallyClause()
           
 void genCode(CodeSequence code)
          Generates a sequence of bytecodes
 void genFinallyCall(CodeSequence code, JReturnStatement ret)
          Generates a sequence of bytecodes
 CodeLabel getFinallyLabel()
           
 JBlock tryClause()
           
 void typecheck(CFlowControlContextType context)
          Typechecks this statement in the context in which it appears.
 
Methods inherited from class org.multijava.mjc.JStatement
acceptsBreak, acceptsContinue, addBreak, addContinue, fail, getBreakLabel, getComments, getContinueLabel
 
Methods inherited from class org.multijava.mjc.JPhylum
check, check, check, check, fail, fail, warn, warn, warn, warn
 
Methods inherited from class org.multijava.util.compiler.Phylum
getTokenReference, setTokenReference
 
Methods inherited from class org.multijava.util.Utils
assertTrue, assertTrue, combineArrays, escapeString, escapeString, fail, fail, getFilePath, hasFlag, hasOtherFlags, parsePathParts, relativePathTo, splitQualifiedName, splitQualifiedName, stripJavaModifiers, stripNonJavaModifiers, stripPrivateModifier, unescapeString, vectorToArray, vectorToIntArray
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

finallyLabel

private CodeLabel finallyLabel

tryClause

private JBlock tryClause

finallyClause

private JBlock finallyClause

generatingFinallyClause

private boolean generatingFinallyClause
Set to true while invoking finallyClause.genCode(), this flag is used to prevent recursive jsrs to finallyClause


localVar

private JLocalVariable localVar

finallyVar

private JLocalVariable finallyVar

returnVar

private JLocalVariable returnVar
Constructor Detail

JTryFinallyStatement

public JTryFinallyStatement(TokenReference where,
                            JBlock tryClause,
                            JBlock finallyClause,
                            JavaStyleComment[] comments)
Construct a node in the parsing tree

Parameters:
where - the line of this node in the source code
tryClause - the body
finallyClause - the finally clause
comments - the comments associated with this statement
Method Detail

typecheck

public void typecheck(CFlowControlContextType context)
               throws PositionedError
Typechecks this statement in the context in which it appears. Mutates the context to record the information learned during checking.

Parameters:
context - the context in which this appears
Throws:
PositionedError - if any checks fail

getFinallyLabel

public CodeLabel getFinallyLabel()
Returns:
the finally label or null

accept

public void accept(MjcVisitor p)
Accepts the specified visitor

Overrides:
accept in class JStatement
Parameters:
p - the visitor

genCode

public void genCode(CodeSequence code)
Generates a sequence of bytecodes

Parameters:
code - the code list

genFinallyCall

public void genFinallyCall(CodeSequence code,
                           JReturnStatement ret)
Generates a sequence of bytecodes

Parameters:
code - the code list

tryClause

public JBlock tryClause()

finallyClause

public JBlock finallyClause()

mjc

mjc is Copyright (C) 2000-2004 by Iowa State University and is distributed under the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. mjc is based in part on the Kopi project Copyright (C) 1990-99 DMS Decision Management Systems Ges.m.b.H.