| org.drools.asm.commons.LocalVariablesSorter
 org.drools.asm.commons.GeneratorAdapter
All known Subclasses: org.drools.asm.commons.AdviceAdapter,
| GeneratorAdapter | | public class GeneratorAdapter extends LocalVariablesSorter (Code) | | A
org.drools.asm.MethodAdapter with convenient methods to generate
code. For example, using this adapter, the class below
public class Example {
public static void main(String[] args) {
System.out.println("Hello world!");
}
}
can be generated as follows:
ClassWriter cw = new ClassWriter(true);
cw.visit(V1_1, ACC_PUBLIC, "Example", null, "java/lang/Object", null);
Method m = Method.getMethod("void <init> ()");
GeneratorAdapter mg = new GeneratorAdapter(ACC_PUBLIC, m, null, null, cw);
mg.loadThis();
mg.invokeConstructor(Type.getType(Object.class), m);
mg.returnValue();
mg.endMethod();
m = Method.getMethod("void main (String[])");
mg = new GeneratorAdapter(ACC_PUBLIC + ACC_STATIC, m, null, null, cw);
mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class));
mg.push("Hello world!");
mg.invokeVirtual(Type.getType(PrintStream.class), Method.getMethod("void println (String)"));
mg.returnValue();
mg.endMethod();
cw.visitEnd();
author:
Juozas Baliuka
author:
Chris Nokleberg
author:
Eric Bruneton |
| Method Summary | |
| public void | arrayLength()
Generates the instruction to compute the length of an array. | | public void | arrayLoad(Type type)
Generates the instruction to load an element from an array. | | public void | arrayStore(Type type)
Generates the instruction to store an element in an array. | | public void | box(Type type)
Generates the instructions to box the top stack value. | | public void | cast(Type from, Type to)
Generates the instructions to cast a numerical value from one type to
another. | | public void | catchException(Label start, Label end, Type exception)
Marks the start of an exception handler. | | public void | checkCast(Type type)
Generates the instruction to check that the top stack value is of the
given type. | | public void | dup()
Generates a DUP instruction. | | public void | dup2()
Generates a DUP2 instruction. | | public void | dup2X1()
Generates a DUP2_X1 instruction. | | public void | dup2X2()
Generates a DUP2_X2 instruction. | | public void | dupX1()
Generates a DUP_X1 instruction. | | public void | dupX2()
Generates a DUP_X2 instruction. | | public void | endMethod()
Marks the end of the visited method. | | public void | getField(Type owner, String name, Type type)
Generates the instruction to push the value of a non static field on the
stack. | | public Type | getLocalType(int local)
Returns the type of the given local variable.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal. | | public void | getStatic(Type owner, String name, Type type)
Generates the instruction to push the value of a static field on the
stack. | | public void | goTo(Label label)
Generates the instruction to jump to the given label. | | public void | ifCmp(Type type, int mode, Label label)
Generates the instructions to jump to a label based on the comparison of
the top two stack values.
Parameters:
type - the type of the top two stack values.
Parameters:
mode - how these values must be compared. | | public void | ifICmp(int mode, Label label)
Generates the instructions to jump to a label based on the comparison of
the top two integer stack values.
Parameters:
mode - how these values must be compared. | | public void | ifNonNull(Label label)
Generates the instruction to jump to the given label if the top stack
value is not null. | | public void | ifNull(Label label)
Generates the instruction to jump to the given label if the top stack
value is null. | | public void | ifZCmp(int mode, Label label)
Generates the instructions to jump to a label based on the comparison of
the top integer stack value with zero.
Parameters:
mode - how these values must be compared. | | public void | iinc(int local, int amount)
Generates the instruction to increment the given local variable. | | public void | instanceOf(Type type)
Generates the instruction to test if the top stack value is of the given
type. | | public void | invokeConstructor(Type type, Method method)
Generates the instruction to invoke a constructor. | | public void | invokeInterface(Type owner, Method method)
Generates the instruction to invoke an interface method. | | public void | invokeStatic(Type owner, Method method)
Generates the instruction to invoke a static method. | | public void | invokeVirtual(Type owner, Method method)
Generates the instruction to invoke a normal method. | | public void | loadArg(int arg)
Generates the instruction to load the given method argument on the stack. | | public void | loadArgArray()
Generates the instructions to load all the method arguments on the stack,
as a single object array. | | public void | loadArgs(int arg, int count)
Generates the instructions to load the given method arguments on the
stack. | | public void | loadArgs()
Generates the instructions to load all the method arguments on the stack. | | public void | loadLocal(int local)
Generates the instruction to load the given local variable on the stack. | | public void | loadLocal(int local, Type type)
Generates the instruction to load the given local variable on the stack. | | public void | loadThis()
Generates the instruction to load 'this' on the stack. | | public void | mark(Label label)
Marks the current code position with the given label. | | public Label | mark()
Marks the current code position with a new label. | | public void | math(int op, Type type)
Generates the instruction to do the specified mathematical or logical
operation.
Parameters:
op - a mathematical or logical operation. | | public void | monitorEnter()
Generates the instruction to get the monitor of the top stack value. | | public void | monitorExit()
Generates the instruction to release the monitor of the top stack value. | | public void | newArray(Type type)
Generates the instruction to create a new array. | | public void | newInstance(Type type)
Generates the instruction to create a new object. | | public Label | newLabel()
Creates a new
Label . | | public int | newLocal(Type type)
Creates a new local variable of the given type.
Parameters:
type - the type of the local variable to be created. | | public void | not()
Generates the instructions to compute the bitwise negation of the top
stack value. | | public void | pop()
Generates a POP instruction. | | public void | pop2()
Generates a POP2 instruction. | | public void | push(boolean value)
Generates the instruction to push the given value on the stack. | | public void | push(int value)
Generates the instruction to push the given value on the stack. | | public void | push(long value)
Generates the instruction to push the given value on the stack. | | public void | push(float value)
Generates the instruction to push the given value on the stack. | | public void | push(double value)
Generates the instruction to push the given value on the stack. | | public void | push(String value)
Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. | | public void | push(Type value)
Generates the instruction to push the given value on the stack. | | public void | putField(Type owner, String name, Type type)
Generates the instruction to store the top stack value in a non static
field. | | public void | putStatic(Type owner, String name, Type type)
Generates the instruction to store the top stack value in a static field. | | public void | ret(int local)
Generates a RET instruction. | | public void | returnValue()
Generates the instruction to return the top stack value to the caller. | | public void | storeArg(int arg)
Generates the instruction to store the top stack value in the given
method argument. | | public void | storeLocal(int local)
Generates the instruction to store the top stack value in the given local
variable. | | public void | storeLocal(int local, Type type)
Generates the instruction to store the top stack value in the given local
variable. | | public void | swap()
Generates a SWAP instruction. | | public void | swap(Type prev, Type type)
Generates the instructions to swap the top two stack values. | | public void | tableSwitch(int[] keys, TableSwitchGenerator generator)
Generates the instructions for a switch statement. | | public void | tableSwitch(int[] keys, TableSwitchGenerator generator, boolean useTable)
Generates the instructions for a switch statement. | | public void | throwException()
Generates the instruction to throw an exception. | | public void | throwException(Type type, String msg)
Generates the instructions to create and throw an exception. | | public void | unbox(Type type)
Generates the instructions to unbox the top stack value. |
| GeneratorAdapter | | public GeneratorAdapter(MethodVisitor mv, int access, String name, String desc)(Code) | | Creates a new
GeneratorAdapter .
Parameters:
mv - the method visitor to which this adapter delegates calls.
Parameters:
access - the method's access flags (see Opcodes).
Parameters:
name - the method's name.
Parameters:
desc - the method's descriptor (see Type Type). |
| GeneratorAdapter | | public GeneratorAdapter(int access, Method method, MethodVisitor mv)(Code) | | Creates a new
GeneratorAdapter .
Parameters:
access - access flags of the adapted method.
Parameters:
method - the adapted method.
Parameters:
mv - the method visitor to which this adapter delegates calls. |
| GeneratorAdapter | | public GeneratorAdapter(int access, Method method, String signature, Type[] exceptions, ClassVisitor cv)(Code) | | Creates a new
GeneratorAdapter .
Parameters:
access - access flags of the adapted method.
Parameters:
method - the adapted method.
Parameters:
signature - the signature of the adapted method (may benull).
Parameters:
exceptions - the exceptions thrown by the adapted method (may benull).
Parameters:
cv - the class visitor to which this adapter delegates calls. |
| arrayLength | | public void arrayLength()(Code) | | Generates the instruction to compute the length of an array.
|
| arrayLoad | | public void arrayLoad(Type type)(Code) | | Generates the instruction to load an element from an array.
Parameters:
type - the type of the array element to be loaded. |
| arrayStore | | public void arrayStore(Type type)(Code) | | Generates the instruction to store an element in an array.
Parameters:
type - the type of the array element to be stored. |
| box | | public void box(Type type)(Code) | | Generates the instructions to box the top stack value. This value is
replaced by its boxed equivalent on top of the stack.
Parameters:
type - the type of the top stack value. |
| cast | | public void cast(Type from, Type to)(Code) | | Generates the instructions to cast a numerical value from one type to
another.
Parameters:
from - the type of the top stack value
Parameters:
to - the type into which this value must be cast. |
| catchException | | public void catchException(Label start, Label end, Type exception)(Code) | | Marks the start of an exception handler.
Parameters:
start - beginning of the exception handler's scope (inclusive).
Parameters:
end - end of the exception handler's scope (exclusive).
Parameters:
exception - internal name of the type of exceptions handled by thehandler. |
| checkCast | | public void checkCast(Type type)(Code) | | Generates the instruction to check that the top stack value is of the
given type.
Parameters:
type - a class or interface type. |
| dup | | public void dup()(Code) | | Generates a DUP instruction.
|
| dup2 | | public void dup2()(Code) | | Generates a DUP2 instruction.
|
| dup2X1 | | public void dup2X1()(Code) | | Generates a DUP2_X1 instruction.
|
| dup2X2 | | public void dup2X2()(Code) | | Generates a DUP2_X2 instruction.
|
| dupX1 | | public void dupX1()(Code) | | Generates a DUP_X1 instruction.
|
| dupX2 | | public void dupX2()(Code) | | Generates a DUP_X2 instruction.
|
| endMethod | | public void endMethod()(Code) | | Marks the end of the visited method.
|
| getField | | public void getField(Type owner, String name, Type type)(Code) | | Generates the instruction to push the value of a non static field on the
stack.
Parameters:
owner - the class in which the field is defined.
Parameters:
name - the name of the field.
Parameters:
type - the type of the field. |
| getLocalType | | public Type getLocalType(int local)(Code) | | Returns the type of the given local variable.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal. the type of the given local variable. |
| getStatic | | public void getStatic(Type owner, String name, Type type)(Code) | | Generates the instruction to push the value of a static field on the
stack.
Parameters:
owner - the class in which the field is defined.
Parameters:
name - the name of the field.
Parameters:
type - the type of the field. |
| goTo | | public void goTo(Label label)(Code) | | Generates the instruction to jump to the given label.
Parameters:
label - where to jump if the condition is true. |
| ifCmp | | public void ifCmp(Type type, int mode, Label label)(Code) | | Generates the instructions to jump to a label based on the comparison of
the top two stack values.
Parameters:
type - the type of the top two stack values.
Parameters:
mode - how these values must be compared. One of EQ, NE, LT, GE, GT,LE.
Parameters:
label - where to jump if the comparison result is true. |
| ifICmp | | public void ifICmp(int mode, Label label)(Code) | | Generates the instructions to jump to a label based on the comparison of
the top two integer stack values.
Parameters:
mode - how these values must be compared. One of EQ, NE, LT, GE, GT,LE.
Parameters:
label - where to jump if the comparison result is true. |
| ifNonNull | | public void ifNonNull(Label label)(Code) | | Generates the instruction to jump to the given label if the top stack
value is not null.
Parameters:
label - where to jump if the condition is true. |
| ifNull | | public void ifNull(Label label)(Code) | | Generates the instruction to jump to the given label if the top stack
value is null.
Parameters:
label - where to jump if the condition is true. |
| ifZCmp | | public void ifZCmp(int mode, Label label)(Code) | | Generates the instructions to jump to a label based on the comparison of
the top integer stack value with zero.
Parameters:
mode - how these values must be compared. One of EQ, NE, LT, GE, GT,LE.
Parameters:
label - where to jump if the comparison result is true. |
| iinc | | public void iinc(int local, int amount)(Code) | | Generates the instruction to increment the given local variable.
Parameters:
local - the local variable to be incremented.
Parameters:
amount - the amount by which the local variable must be incremented. |
| instanceOf | | public void instanceOf(Type type)(Code) | | Generates the instruction to test if the top stack value is of the given
type.
Parameters:
type - a class or interface type. |
| invokeConstructor | | public void invokeConstructor(Type type, Method method)(Code) | | Generates the instruction to invoke a constructor.
Parameters:
type - the class in which the constructor is defined.
Parameters:
method - the constructor to be invoked. |
| invokeInterface | | public void invokeInterface(Type owner, Method method)(Code) | | Generates the instruction to invoke an interface method.
Parameters:
owner - the class in which the method is defined.
Parameters:
method - the method to be invoked. |
| invokeStatic | | public void invokeStatic(Type owner, Method method)(Code) | | Generates the instruction to invoke a static method.
Parameters:
owner - the class in which the method is defined.
Parameters:
method - the method to be invoked. |
| invokeVirtual | | public void invokeVirtual(Type owner, Method method)(Code) | | Generates the instruction to invoke a normal method.
Parameters:
owner - the class in which the method is defined.
Parameters:
method - the method to be invoked. |
| loadArg | | public void loadArg(int arg)(Code) | | Generates the instruction to load the given method argument on the stack.
Parameters:
arg - the index of a method argument. |
| loadArgArray | | public void loadArgArray()(Code) | | Generates the instructions to load all the method arguments on the stack,
as a single object array.
|
| loadArgs | | public void loadArgs(int arg, int count)(Code) | | Generates the instructions to load the given method arguments on the
stack.
Parameters:
arg - the index of the first method argument to be loaded.
Parameters:
count - the number of method arguments to be loaded. |
| loadArgs | | public void loadArgs()(Code) | | Generates the instructions to load all the method arguments on the stack.
|
| loadLocal | | public void loadLocal(int local)(Code) | | Generates the instruction to load the given local variable on the stack.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal. |
| loadLocal | | public void loadLocal(int local, Type type)(Code) | | Generates the instruction to load the given local variable on the stack.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal.
Parameters:
type - the type of this local variable. |
| loadThis | | public void loadThis()(Code) | | Generates the instruction to load 'this' on the stack.
|
| mark | | public void mark(Label label)(Code) | | Marks the current code position with the given label.
Parameters:
label - a label. |
| mark | | public Label mark()(Code) | | Marks the current code position with a new label.
the label that was created to mark the current code position. |
| math | | public void math(int op, Type type)(Code) | | Generates the instruction to do the specified mathematical or logical
operation.
Parameters:
op - a mathematical or logical operation. Must be one of ADD, SUB,MUL, DIV, REM, NEG, SHL, SHR, USHR, AND, OR, XOR.
Parameters:
type - the type of the operand(s) for this operation. |
| monitorEnter | | public void monitorEnter()(Code) | | Generates the instruction to get the monitor of the top stack value.
|
| monitorExit | | public void monitorExit()(Code) | | Generates the instruction to release the monitor of the top stack value.
|
| newArray | | public void newArray(Type type)(Code) | | Generates the instruction to create a new array.
Parameters:
type - the type of the array elements. |
| newInstance | | public void newInstance(Type type)(Code) | | Generates the instruction to create a new object.
Parameters:
type - the class of the object to be created. |
| newLocal | | public int newLocal(Type type)(Code) | | Creates a new local variable of the given type.
Parameters:
type - the type of the local variable to be created. the identifier of the newly created local variable. |
| not | | public void not()(Code) | | Generates the instructions to compute the bitwise negation of the top
stack value.
|
| pop | | public void pop()(Code) | | Generates a POP instruction.
|
| pop2 | | public void pop2()(Code) | | Generates a POP2 instruction.
|
| push | | public void push(boolean value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. |
| push | | public void push(int value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. |
| push | | public void push(long value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. |
| push | | public void push(float value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. |
| push | | public void push(double value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. |
| push | | public void push(String value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. May be null. |
| push | | public void push(Type value)(Code) | | Generates the instruction to push the given value on the stack.
Parameters:
value - the value to be pushed on the stack. |
| putField | | public void putField(Type owner, String name, Type type)(Code) | | Generates the instruction to store the top stack value in a non static
field.
Parameters:
owner - the class in which the field is defined.
Parameters:
name - the name of the field.
Parameters:
type - the type of the field. |
| putStatic | | public void putStatic(Type owner, String name, Type type)(Code) | | Generates the instruction to store the top stack value in a static field.
Parameters:
owner - the class in which the field is defined.
Parameters:
name - the name of the field.
Parameters:
type - the type of the field. |
| ret | | public void ret(int local)(Code) | | Generates a RET instruction.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal. |
| returnValue | | public void returnValue()(Code) | | Generates the instruction to return the top stack value to the caller.
|
| storeArg | | public void storeArg(int arg)(Code) | | Generates the instruction to store the top stack value in the given
method argument.
Parameters:
arg - the index of a method argument. |
| storeLocal | | public void storeLocal(int local)(Code) | | Generates the instruction to store the top stack value in the given local
variable.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal. |
| storeLocal | | public void storeLocal(int local, Type type)(Code) | | Generates the instruction to store the top stack value in the given local
variable.
Parameters:
local - a local variable identifier, as returned by GeneratorAdapter.newLocalnewLocal.
Parameters:
type - the type of this local variable. |
| swap | | public void swap()(Code) | | Generates a SWAP instruction.
|
| swap | | public void swap(Type prev, Type type)(Code) | | Generates the instructions to swap the top two stack values.
Parameters:
prev - type of the top - 1 stack value.
Parameters:
type - type of the top stack value. |
| tableSwitch | | public void tableSwitch(int[] keys, TableSwitchGenerator generator)(Code) | | Generates the instructions for a switch statement.
Parameters:
keys - the switch case keys.
Parameters:
generator - a generator to generate the code for the switch cases. |
| tableSwitch | | public void tableSwitch(int[] keys, TableSwitchGenerator generator, boolean useTable)(Code) | | Generates the instructions for a switch statement.
Parameters:
keys - the switch case keys.
Parameters:
generator - a generator to generate the code for the switch cases.
Parameters:
useTable - true to use a TABLESWITCH instruction, orfalse to use a LOOKUPSWITCH instruction. |
| throwException | | public void throwException()(Code) | | Generates the instruction to throw an exception.
|
| throwException | | public void throwException(Type type, String msg)(Code) | | Generates the instructions to create and throw an exception. The
exception class must have a constructor with a single String argument.
Parameters:
type - the class of the exception to be thrown.
Parameters:
msg - the detailed message of the exception. |
| unbox | | public void unbox(Type type)(Code) | | Generates the instructions to unbox the top stack value. This value is
replaced by its unboxed equivalent on top of the stack.
Parameters:
type - the type of the top stack value. |
| Fields inherited from org.drools.asm.commons.LocalVariablesSorter | final protected int firstLocal(Code)(Java Doc)
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