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/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000,2002,2003 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package oracle.toplink.libraries.asm;
/**
* A visitor to visit the bytecode instructions of a Java method. The methods
* of this visitor must be called in the sequential order of the bytecode
* instructions of the visited code. The {@link #visitMaxs visitMaxs} method
* must be called after all the instructions have been visited. The {@link
* #visitTryCatchBlock visitTryCatchBlock}, {@link #visitLocalVariable
* visitLocalVariable} and {@link #visitLineNumber visitLineNumber} methods may
* be called in any order, at any time (provided the labels passed as arguments
* have already been visited with {@link #visitLabel visitLabel}).
*
* @author Eric Bruneton
*/
public interface CodeVisitor {
/**
* Visits a zero operand instruction.
*
* @param opcode the opcode of the instruction to be visited. This opcode is
* either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2,
* ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1,
* FCONST_2, DCONST_0, DCONST_1,
*
* IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
* IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
* SASTORE,
*
* POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP,
*
* IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL,
* DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG,
* FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR,
* LOR, IXOR, LXOR,
*
* I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C,
* I2S,
*
* LCMP, FCMPL, FCMPG, DCMPL, DCMPG,
*
* IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN,
*
* ARRAYLENGTH,
*
* ATHROW,
*
* MONITORENTER, or MONITOREXIT.
*/
void visitInsn (int opcode);
/**
* Visits an instruction with a single int operand.
*
* @param opcode the opcode of the instruction to be visited. This opcode is
* either BIPUSH, SIPUSH or NEWARRAY.
* @param operand the operand of the instruction to be visited.
*/
void visitIntInsn (int opcode, int operand);
/**
* Visits a local variable instruction. A local variable instruction is an
* instruction that loads or stores the value of a local variable.
*
* @param opcode the opcode of the local variable instruction to be visited.
* This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE,
* LSTORE, FSTORE, DSTORE, ASTORE or RET.
* @param var the operand of the instruction to be visited. This operand is
* the index of a local variable.
*/
void visitVarInsn (int opcode, int var);
/**
* Visits a type instruction. A type instruction is an instruction that
* takes a type descriptor as parameter.
*
* @param opcode the opcode of the type instruction to be visited. This opcode
* is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
* @param desc the operand of the instruction to be visited. This operand is
* must be a fully qualified class name in internal form, or the type
* descriptor of an array type (see {@link Type Type}).
*/
void visitTypeInsn (int opcode, String desc);
/**
* Visits a field instruction. A field instruction is an instruction that
* loads or stores the value of a field of an object.
*
* @param opcode the opcode of the type instruction to be visited. This opcode
* is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
* @param owner the internal name of the field's owner class (see {@link
* Type#getInternalName() getInternalName}).
* @param name the field's name.
* @param desc the field's descriptor (see {@link Type Type}).
*/
void visitFieldInsn (int opcode, String owner, String name, String desc);
/**
* Visits a method instruction. A method instruction is an instruction that
* invokes a method.
*
* @param opcode the opcode of the type instruction to be visited. This opcode
* is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
* INVOKEINTERFACE.
* @param owner the internal name of the method's owner class (see {@link
* Type#getInternalName() getInternalName}).
* @param name the method's name.
* @param desc the method's descriptor (see {@link Type Type}).
*/
void visitMethodInsn (int opcode, String owner, String name, String desc);
/**
* Visits a jump instruction. A jump instruction is an instruction that may
* jump to another instruction.
*
* @param opcode the opcode of the type instruction to be visited. This opcode
* is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE,
* IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE,
* GOTO, JSR, IFNULL or IFNONNULL.
* @param label the operand of the instruction to be visited. This operand is
* a label that designates the instruction to which the jump instruction
* may jump.
*/
void visitJumpInsn (int opcode, Label label);
/**
* Visits a label. A label designates the instruction that will be visited
* just after it.
*
* @param label a {@link Label Label} object.
*/
void visitLabel (Label label);
// -------------------------------------------------------------------------
// Special instructions
// -------------------------------------------------------------------------
/**
* Visits a LDC instruction.
*
* @param cst the constant to be loaded on the stack. This parameter must be
* a non null {@link java.lang.Integer Integer}, a {@link java.lang.Float
* Float}, a {@link java.lang.Long Long}, a {@link java.lang.Double
* Double} a {@link String String} (or a {@link Type Type} for
* .class constants, for classes whose version is 49.0 or more).
*/
void visitLdcInsn (Object cst);
/**
* Visits an IINC instruction.
*
* @param var index of the local variable to be incremented.
* @param increment amount to increment the local variable by.
*/
void visitIincInsn (int var, int increment);
/**
* Visits a TABLESWITCH instruction.
*
* @param min the minimum key value.
* @param max the maximum key value.
* @param dflt beginning of the default handler block.
* @param labels beginnings of the handler blocks. labels[i] is the
* beginning of the handler block for the min + i key.
*/
void visitTableSwitchInsn (int min, int max, Label dflt, Label labels[]);
/**
* Visits a LOOKUPSWITCH instruction.
*
* @param dflt beginning of the default handler block.
* @param keys the values of the keys.
* @param labels beginnings of the handler blocks. labels[i] is the
* beginning of the handler block for the keys[i] key.
*/
void visitLookupSwitchInsn (Label dflt, int keys[], Label labels[]);
/**
* Visits a MULTIANEWARRAY instruction.
*
* @param desc an array type descriptor (see {@link Type Type}).
* @param dims number of dimensions of the array to allocate.
*/
void visitMultiANewArrayInsn (String desc, int dims);
// -------------------------------------------------------------------------
// Exceptions table entries, max stack size and max locals
// -------------------------------------------------------------------------
/**
* Visits a try catch block.
*
* @param start beginning of the exception handler's scope (inclusive).
* @param end end of the exception handler's scope (exclusive).
* @param handler beginning of the exception handler's code.
* @param type internal name of the type of exceptions handled by the handler,
* or null to catch any exceptions (for "finally" blocks).
* @throws IllegalArgumentException if one of the labels has not already been
* visited by this visitor (by the {@link #visitLabel visitLabel}
* method).
*/
void visitTryCatchBlock (Label start, Label end, Label handler, String type);
/**
* Visits the maximum stack size and the maximum number of local variables of
* the method.
*
* @param maxStack maximum stack size of the method.
* @param maxLocals maximum number of local variables for the method.
*/
void visitMaxs (int maxStack, int maxLocals);
// -------------------------------------------------------------------------
// Debug information
// -------------------------------------------------------------------------
/**
* Visits a local variable declaration.
*
* @param name the name of a local variable.
* @param desc the type descriptor of this local variable.
* @param start the first instruction corresponding to the scope of this
* local variable (inclusive).
* @param end the last instruction corresponding to the scope of this
* local variable (exclusive).
* @param index the local variable's index.
* @throws IllegalArgumentException if one of the labels has not already been
* visited by this visitor (by the {@link #visitLabel visitLabel}
* method).
*/
void visitLocalVariable (
String name,
String desc,
Label start,
Label end,
int index);
/**
* Visits a line number declaration.
*
* @param line a line number. This number refers to the source file
* from which the class was compiled.
* @param start the first instruction corresponding to this line number.
* @throws IllegalArgumentException if start has not already been
* visited by this visitor (by the {@link #visitLabel visitLabel}
* method).
*/
void visitLineNumber (int line, Label start);
// -------------------------------------------------------------------------
// Non standard attributes
// -------------------------------------------------------------------------
/**
* Visits a non standard attribute of the code. This method must visit only
* the first attribute in the given attribute list.
*
* @param attr a non standard code attribute. Must not be null.
*/
void visitAttribute (Attribute attr);
}
