Package org.apache.tapestry5.internal.plastic

Class InstructionBuilderImpl

java.lang.Object

org.apache.tapestry5.internal.plastic.Lockable

org.apache.tapestry5.internal.plastic.InstructionBuilderImpl

All Implemented Interfaces:

org.apache.tapestry5.internal.plastic.asm.Opcodes, InstructionBuilder

public class InstructionBuilderImpl
extends Lockable
implements org.apache.tapestry5.internal.plastic.asm.Opcodes, InstructionBuilder

Field Summary

Fields

Modifier and Type	Field	Description
protected NameCache	cache
protected InstructionBuilderState	state
protected org.apache.tapestry5.internal.plastic.asm.MethodVisitor	v

Fields inherited from interface org.apache.tapestry5.internal.plastic.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_RECORD, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9_EXPERIMENTAL, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, 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, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V9

Method Summary

Modifier and Type	Method	Description
InstructionBuilder	arrayLength()	Expects the top object on the stack to be an array.
InstructionBuilder	boxPrimitive(String typeName)	If the type name is a primitive type, adds code to box the type into the equivalent wrapper type, using static methods on the wrapper type.
InstructionBuilder	castOrUnbox(String typeName)	Casts the object on top of the stack to the indicated type.
InstructionBuilder	checkcast(Class clazz)
InstructionBuilder	checkcast(String className)	Adds a check that the object on top of the stack is assignable to the indicated class.
InstructionBuilder	compareSpecial(String typeName)	Special comparison logic for primitive float, double and long.
InstructionBuilder	doWhile(Condition condition, WhileCallback callback)	Implements a simple loop based on a condition.
InstructionBuilder	dupe()	Duplicates the top object on the stack.
InstructionBuilder	dupe(int depth)	Duplicates the top object on the stack, placing the result at some depth.
InstructionBuilder	dupeWide()	Duplicates a wide value (a primitive long or double).
InstructionBuilder	getField(String className, String fieldName, Class fieldType)	Loads a field onto the stack.
InstructionBuilder	getField(String className, String fieldName, String typeName)	Loads an instance field onto the stack.
InstructionBuilder	getField(PlasticField field)	Loads an instance or static field onto the stack.
InstructionBuilder	getStaticField(String className, String fieldName, Class fieldType)	Gets a static field; does not consume a value from the stack, but pushes the fields' value onto the stack.
InstructionBuilder	getStaticField(String className, String fieldName, String typeName)	Gets a static field; does not consume a value from the stack, but pushes the fields' value onto the stack.
InstructionBuilder	increment(LocalVariable variable)	Increments a local integer variable.
InstructionBuilder	invoke(Class clazz, Class returnType, String methodName, Class... argumentTypes)	Automatically invokes an interface or virtual method.
InstructionBuilder	invoke(Method method)	Automatically invokes an interface or virtual method.
InstructionBuilder	invokeConstructor(Class clazz, Class... argumentTypes)
InstructionBuilder	invokeConstructor(String className, String... argumentTypes)	Invokes a constructor on a class.
InstructionBuilder	invokeInterface(String interfaceName, String returnType, String methodName, String... argumentTypes)	Invokes a standard virtual method.
InstructionBuilder	invokeSpecial(String containingClassName, MethodDescription description)	Invokes an instance method of a base class, or a private method of a class, using the target object and parameters already on the stack.
InstructionBuilder	invokeStatic(Class clazz, Class returnType, String methodName, Class... argumentTypes)	Invokes a static method of a class.
InstructionBuilder	invokeVirtual(String className, String returnType, String methodName, String... argumentTypes)	Invokes a standard virtual method.
InstructionBuilder	invokeVirtual(PlasticMethod method)
InstructionBuilder	iterateArray(InstructionBuilderCallback callback)	Expects an array to be the top value on the stack.
InstructionBuilder	loadArgument(int index)	Loads an argument onto the stack, using the opcode appropriate to the argument's type.
InstructionBuilder	loadArguments()	Loads all arguments for the current method onto the stack; this is used when invoking a method that takes the exact same parameters (often, a super-class implementation).
InstructionBuilder	loadArrayElement()	Loads a value from an array object.
InstructionBuilder	loadArrayElement(int index, String elementType)	Loads a value from an array object, which must be the top element of the stack.
InstructionBuilder	loadConstant(Object constant)	Loads a constant value
InstructionBuilder	loadNull()	Loads the null constant onto the stack.
InstructionBuilder	loadThis()	Loads this onto the stack.
InstructionBuilder	loadTypeConstant(Class clazz)	Loads a Java type (a Class instance) as a constant.
InstructionBuilder	loadTypeConstant(String typeName)	Loads a Java type (a Class instance) as a constant.
InstructionBuilder	loadVariable(LocalVariable var)	Loads a value from a local variable and pushes it onto the stack.
InstructionBuilder	newInstance(Class clazz)	A convenience version of InstructionBuilder.newInstance(String) used when the class is known at build time.
InstructionBuilder	newInstance(String className)	Creates a new, uninitialized instance of the indicated class.
InstructionBuilder	pop()	Discards the top value on the stack.
InstructionBuilder	popWide()	Pops a wide value (a primitive long or double).
InstructionBuilder	putField(String className, String fieldName, Class fieldType)
InstructionBuilder	putField(String className, String fieldName, String typeName)	Expects the stack to contain the instance to update, and the value to store into the field.
InstructionBuilder	putStaticField(String className, String fieldName, Class fieldType)	Sets a static field; the new field value should be on top of the stack.
InstructionBuilder	putStaticField(String className, String fieldName, String typeName)	Sets a static field; the new field value should be on top of the stack.
InstructionBuilder	returnDefaultValue()	Returns the default value for the method, which may be null, or a specific primitive value.
InstructionBuilder	returnResult()	Returns the top value on the stack.
InstructionBuilder	startSwitch(int min, int max, SwitchCallback callback)	Starts a switch statement.
InstructionBuilder	startTryCatch(TryCatchCallback callback)	Defines the start of a block that can have exception handlers and finally blocks applied.
InstructionBuilder	startVariable(String type, LocalVariableCallback callback)	Starts a block where the given name is active.
InstructionBuilder	storeVariable(LocalVariable var)	Stores the value on top of the stack to a local variable (previously defined by InstructionBuilder.startVariable(String, LocalVariableCallback).
InstructionBuilder	swap()	Swaps the top element of the stack with the next element down.
InstructionBuilder	throwException()	Throws the exception on the top of the stack.
InstructionBuilder	throwException(Class<? extends Throwable> exceptionType, String message)
InstructionBuilder	throwException(String className, String message)	Throws an exception with a fixed message.
InstructionBuilder	unboxPrimitive(String typeName)	Unboxes a wrapper type to a primitive type if typeName is a primitive type name (the value on the stack should be the corresponding wrapper type instance).
InstructionBuilder	when(Condition condition, InstructionBuilderCallback ifTrue)	Simplified version of InstructionBuilder.when(Condition, WhenCallback) that simply executes the callback code when the condition is true and does nothing if the condition is false (the more general case).
InstructionBuilder	when(Condition condition, WhenCallback callback)	Executes conditional code based on a Condition.

Methods inherited from class org.apache.tapestry5.internal.plastic.Lockable

check, lock

Methods inherited from class java.lang.Object

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

Field Detail

state

protected final InstructionBuilderState state

v

protected final org.apache.tapestry5.internal.plastic.asm.MethodVisitor v

cache

protected final NameCache cache

Method Detail

returnDefaultValue

public InstructionBuilder returnDefaultValue()

Description copied from interface: InstructionBuilder

Returns the default value for the method, which may be null, or a specific primitive value.

Specified by:

returnDefaultValue in interface InstructionBuilder

loadThis

public InstructionBuilder loadThis()

Description copied from interface: InstructionBuilder

Loads this onto the stack.

Specified by:

loadThis in interface InstructionBuilder

loadNull

public InstructionBuilder loadNull()

Description copied from interface: InstructionBuilder

Loads the null constant onto the stack.

Specified by:

loadNull in interface InstructionBuilder

loadArgument

public InstructionBuilder loadArgument(int index)

Description copied from interface: InstructionBuilder

Loads an argument onto the stack, using the opcode appropriate to the argument's type. In addition this automatically adjusts for arguments of primitive type long or double (which take up two local variable indexes, rather than one as for all other types)

Specified by:

loadArgument in interface InstructionBuilder

Parameters:

index - to argument (0 is the first argument, not this)

loadArguments

public InstructionBuilder loadArguments()

Description copied from interface: InstructionBuilder

Loads all arguments for the current method onto the stack; this is used when invoking a method that takes the exact same parameters (often, a super-class implementation). A call to InstructionBuilder.loadThis() (or some other way of identifying the target method) should precede this call.

Specified by:

loadArguments in interface InstructionBuilder

invokeSpecial

public InstructionBuilder invokeSpecial(String containingClassName,
                                        MethodDescription description)

Description copied from interface: InstructionBuilder

Invokes an instance method of a base class, or a private method of a class, using the target object and parameters already on the stack. Leaves the result on the stack (unless its a void method).

Specified by:

invokeSpecial in interface InstructionBuilder

Parameters:

containingClassName - class name containing the method

description - describes the method name, parameters and return type

invokeVirtual

public InstructionBuilder invokeVirtual(PlasticMethod method)

Specified by:

invokeVirtual in interface InstructionBuilder

invokeVirtual

public InstructionBuilder invokeVirtual(String className,
                                        String returnType,
                                        String methodName,
                                        String... argumentTypes)

Description copied from interface: InstructionBuilder

Invokes a standard virtual method.

Specified by:

invokeVirtual in interface InstructionBuilder

invokeInterface

public InstructionBuilder invokeInterface(String interfaceName,
                                          String returnType,
                                          String methodName,
                                          String... argumentTypes)

Description copied from interface: InstructionBuilder

Invokes a standard virtual method.

Specified by:

invokeInterface in interface InstructionBuilder

invokeStatic

public InstructionBuilder invokeStatic(Class clazz,
                                       Class returnType,
                                       String methodName,
                                       Class... argumentTypes)

Description copied from interface: InstructionBuilder

Invokes a static method of a class.

Specified by:

invokeStatic in interface InstructionBuilder

invoke

public InstructionBuilder invoke(Method method)

Description copied from interface: InstructionBuilder

Automatically invokes an interface or virtual method. Remember to use InstructionBuilder.invokeConstructor(Class, Class...) for constructors and InstructionBuilder.invokeSpecial(String, MethodDescription) for private methods.

Specified by:

invoke in interface InstructionBuilder

invoke

public InstructionBuilder invoke(Class clazz,
                                 Class returnType,
                                 String methodName,
                                 Class... argumentTypes)

Description copied from interface: InstructionBuilder

Automatically invokes an interface or virtual method. Remember to use InstructionBuilder.invokeConstructor(Class, Class...) for constructors and InstructionBuilder.invokeSpecial(String, MethodDescription) for private methods.

Specified by:

invoke in interface InstructionBuilder

returnResult

public InstructionBuilder returnResult()

Description copied from interface: InstructionBuilder

Returns the top value on the stack. For void methods, no value should be on the stack and the method will simply return.

Specified by:

returnResult in interface InstructionBuilder

boxPrimitive

public InstructionBuilder boxPrimitive(String typeName)

Description copied from interface: InstructionBuilder

If the type name is a primitive type, adds code to box the type into the equivalent wrapper type, using static methods on the wrapper type. Does nothing if the type is not primitive, or type void.

Specified by:

boxPrimitive in interface InstructionBuilder

unboxPrimitive

public InstructionBuilder unboxPrimitive(String typeName)

Description copied from interface: InstructionBuilder

Unboxes a wrapper type to a primitive type if typeName is a primitive type name (the value on the stack should be the corresponding wrapper type instance). Does nothing for non-primitive types.

Specified by:

unboxPrimitive in interface InstructionBuilder

Parameters:

typeName - possibly primitive type name

getField

public InstructionBuilder getField(String className,
                                   String fieldName,
                                   String typeName)

Description copied from interface: InstructionBuilder

Loads an instance field onto the stack. The object containing the field should already be loaded onto the stack (usually, via InstructionBuilder.loadThis()).

Specified by:

getField in interface InstructionBuilder

Parameters:

className - name of class containing the field

fieldName - name of the field

typeName - type of field

getStaticField

public InstructionBuilder getStaticField(String className,
                                         String fieldName,
                                         String typeName)

Description copied from interface: InstructionBuilder

Gets a static field; does not consume a value from the stack, but pushes the fields' value onto the stack.

Specified by:

getStaticField in interface InstructionBuilder

Parameters:

className - name of class containing the field

fieldName - name of the field

typeName - type of field

getStaticField

public InstructionBuilder getStaticField(String className,
                                         String fieldName,
                                         Class fieldType)

Description copied from interface: InstructionBuilder

Gets a static field; does not consume a value from the stack, but pushes the fields' value onto the stack.

Specified by:

getStaticField in interface InstructionBuilder

Parameters:

className - name of class containing the field

fieldName - name of the field

fieldType - type of field

putStaticField

public InstructionBuilder putStaticField(String className,
                                         String fieldName,
                                         Class fieldType)

Description copied from interface: InstructionBuilder

Sets a static field; the new field value should be on top of the stack.

Specified by:

putStaticField in interface InstructionBuilder

Parameters:

className - name of class containing the field

fieldName - name of the field

fieldType - type of field

putStaticField

public InstructionBuilder putStaticField(String className,
                                         String fieldName,
                                         String typeName)

Description copied from interface: InstructionBuilder

Sets a static field; the new field value should be on top of the stack.

Specified by:

putStaticField in interface InstructionBuilder

Parameters:

className - name of class containing the field

fieldName - name of the field

typeName - type of field

getField

public InstructionBuilder getField(PlasticField field)

Description copied from interface: InstructionBuilder

Loads an instance or static field onto the stack. The plastic class instance containing the field should already be loaded onto the stack (usually, via InstructionBuilder.loadThis()).

Specified by:

getField in interface InstructionBuilder

Parameters:

field - identifies name, type and container of field to load

putField

public InstructionBuilder putField(String className,
                                   String fieldName,
                                   String typeName)

Description copied from interface: InstructionBuilder

Expects the stack to contain the instance to update, and the value to store into the field.

Specified by:

putField in interface InstructionBuilder

putField

public InstructionBuilder putField(String className,
                                   String fieldName,
                                   Class fieldType)

Specified by:

putField in interface InstructionBuilder

getField

public InstructionBuilder getField(String className,
                                   String fieldName,
                                   Class fieldType)

Description copied from interface: InstructionBuilder

Loads a field onto the stack. This version is used when the field type is known at build time, rather than discovered at runtime.

Specified by:

getField in interface InstructionBuilder

Parameters:

className - name of class containing the field

fieldName - name of the field

fieldType - type of field

loadArrayElement

public InstructionBuilder loadArrayElement(int index,
                                           String elementType)

Description copied from interface: InstructionBuilder

Loads a value from an array object, which must be the top element of the stack.

Specified by:

loadArrayElement in interface InstructionBuilder

Parameters:

index - constant index into the array

elementType - the type name of the elements of the array Note: currently only reference types (objects and arrays) are supported, not primitives

loadArrayElement

public InstructionBuilder loadArrayElement()

Description copied from interface: InstructionBuilder

Loads a value from an array object. The stack should have the array at depth 1, and an array index on top. Only object arrays (not arrays of primitives) are supported.

Specified by:

loadArrayElement in interface InstructionBuilder

checkcast

public InstructionBuilder checkcast(String className)

Description copied from interface: InstructionBuilder

Adds a check that the object on top of the stack is assignable to the indicated class.

Specified by:

checkcast in interface InstructionBuilder

Parameters:

className - class to cast to

checkcast

public InstructionBuilder checkcast(Class clazz)

Specified by:

checkcast in interface InstructionBuilder

startTryCatch

public InstructionBuilder startTryCatch(TryCatchCallback callback)

Description copied from interface: InstructionBuilder

Defines the start of a block that can have exception handlers and finally blocks applied. Continue using this InstructionBuilder to define code inside the block, then call methods on the InstructionBlock to define the end of the block and set up handlers.

Specified by:

startTryCatch in interface InstructionBuilder

Parameters:

callback - allows generation of try, catch, and finally clauses

newInstance

public InstructionBuilder newInstance(String className)

Description copied from interface: InstructionBuilder

Creates a new, uninitialized instance of the indicated class. This should be followed by code to call the new instance's constructor.

Specified by:

newInstance in interface InstructionBuilder

Parameters:

className - of class to instantiate

newInstance

public InstructionBuilder newInstance(Class clazz)

Description copied from interface: InstructionBuilder

A convenience version of InstructionBuilder.newInstance(String) used when the class is known at build time.

Specified by:

newInstance in interface InstructionBuilder

Parameters:

clazz - to instantiate

invokeConstructor

public InstructionBuilder invokeConstructor(String className,
                                            String... argumentTypes)

Description copied from interface: InstructionBuilder

Invokes a constructor on a class. The instance should already be on the stack, followed by the right number and type of parameters. Note that a constructor acts like a void method, so you will often follow the sequence: newInstance(), dupe(0), invokeConstructor() so that a reference to the instance is left on the stack.F

Specified by:

invokeConstructor in interface InstructionBuilder

Parameters:

className - the class containing the constructor

argumentTypes - java type names for each argument of the constructor

invokeConstructor

public InstructionBuilder invokeConstructor(Class clazz,
                                            Class... argumentTypes)

Specified by:

invokeConstructor in interface InstructionBuilder

dupe

public InstructionBuilder dupe(int depth)

Description copied from interface: InstructionBuilder

Duplicates the top object on the stack, placing the result at some depth.

Specified by:

dupe in interface InstructionBuilder

Parameters:

depth - 0 (DUP), 1 (DUP_X1) or 2 (DUP_X2)

dupe

public InstructionBuilder dupe()

Description copied from interface: InstructionBuilder

Duplicates the top object on the stack. Commonly used with InstructionBuilder.when(Condition, WhenCallback).

Specified by:

dupe in interface InstructionBuilder

See Also:

InstructionBuilder.dupe(int)

pop

public InstructionBuilder pop()

Description copied from interface: InstructionBuilder

Discards the top value on the stack. Assumes the value is a single word value: an object reference, or a small primitive) and not a double or long.

Specified by:

pop in interface InstructionBuilder

swap

public InstructionBuilder swap()

Description copied from interface: InstructionBuilder

Swaps the top element of the stack with the next element down. Note that this can cause problems if the top element on the stack is a long or double.

Specified by:

swap in interface InstructionBuilder

loadConstant

public InstructionBuilder loadConstant(Object constant)

Description copied from interface: InstructionBuilder

Loads a constant value

Specified by:

loadConstant in interface InstructionBuilder

Parameters:

constant - Integer, Float, Double, Long, String or null

loadTypeConstant

public InstructionBuilder loadTypeConstant(String typeName)

Description copied from interface: InstructionBuilder

Loads a Java type (a Class instance) as a constant. This assumes the type name is the name of class (or array) but not a primitive type.

Specified by:

loadTypeConstant in interface InstructionBuilder

Parameters:

typeName - Java class name

loadTypeConstant

public InstructionBuilder loadTypeConstant(Class clazz)

Description copied from interface: InstructionBuilder

Loads a Java type (a Class instance) as a constant. This assumes the type name is the name of class (or array) but not a primitive type.

Specified by:

loadTypeConstant in interface InstructionBuilder

Parameters:

clazz - Java type to load as a constant

castOrUnbox

public InstructionBuilder castOrUnbox(String typeName)

Description copied from interface: InstructionBuilder

Casts the object on top of the stack to the indicated type. For primitive types, casts to the wrapper type and invokes the appropriate unboxing static method call, leaving a primitive type value on the stack.

Specified by:

castOrUnbox in interface InstructionBuilder

Parameters:

typeName - to cast or unbox to

throwException

public InstructionBuilder throwException(String className,
                                         String message)

Description copied from interface: InstructionBuilder

Throws an exception with a fixed message. Assumes the exception class includes a constructor that takes a single string.

Specified by:

throwException in interface InstructionBuilder

Parameters:

className - name of exception class to instantiate

message - message (passed as first and only parameter to constructor)

throwException

public InstructionBuilder throwException(Class<? extends Throwable> exceptionType,
                                         String message)

Specified by:

throwException in interface InstructionBuilder

throwException

public InstructionBuilder throwException()

Description copied from interface: InstructionBuilder

Throws the exception on the top of the stack.

Specified by:

throwException in interface InstructionBuilder

startSwitch

public InstructionBuilder startSwitch(int min,
                                      int max,
                                      SwitchCallback callback)

Description copied from interface: InstructionBuilder

Starts a switch statement.

Specified by:

startSwitch in interface InstructionBuilder

Parameters:

min - the minimum value to match against

max - the maximum value to match against

startVariable

public InstructionBuilder startVariable(String type,
                                        LocalVariableCallback callback)

Description copied from interface: InstructionBuilder

Starts a block where the given name is active.

Specified by:

startVariable in interface InstructionBuilder

Parameters:

type - type of local variable

callback - generates code used when variable is in effect

storeVariable

public InstructionBuilder storeVariable(LocalVariable var)

Description copied from interface: InstructionBuilder

Stores the value on top of the stack to a local variable (previously defined by InstructionBuilder.startVariable(String, LocalVariableCallback).

Specified by:

storeVariable in interface InstructionBuilder

loadVariable

public InstructionBuilder loadVariable(LocalVariable var)

Description copied from interface: InstructionBuilder

Loads a value from a local variable and pushes it onto the stack. The variable is defined by InstructionBuilder.startVariable(String, LocalVariableCallback).

Specified by:

loadVariable in interface InstructionBuilder

when

public InstructionBuilder when(Condition condition,
                               InstructionBuilderCallback ifTrue)

Description copied from interface: InstructionBuilder

Simplified version of InstructionBuilder.when(Condition, WhenCallback) that simply executes the callback code when the condition is true and does nothing if the condition is false (the more general case). The testing opcodes all pop the value off the stack, so this is usually preceded by dupe(0).

Specified by:

when in interface InstructionBuilder

Parameters:

condition - to evaluate

ifTrue - generates code for when condition is true

Returns:

this builder

when

public InstructionBuilder when(Condition condition,
                               WhenCallback callback)

Description copied from interface: InstructionBuilder

Executes conditional code based on a Condition. The testing opcodes all pop the value off the stack, so this is usually preceded by dupe(0).

Specified by:

when in interface InstructionBuilder

Parameters:

condition - defines true and false cases

callback - provides code for true and false blocks

Returns:

this builder

doWhile

public InstructionBuilder doWhile(Condition condition,
                                  WhileCallback callback)

Description copied from interface: InstructionBuilder

Implements a simple loop based on a condition. First the WhileCallback.buildTest(InstructionBuilder) code is executed, then the condition is evaluated (which will consume at least the top value on the stack). When the condition is false, the loop is exited. When the condition is true, the code defined by WhileCallback.buildBody(InstructionBuilder) is executed, and then a GOTO back to the test code.

Specified by:

doWhile in interface InstructionBuilder

Returns:

this builder

increment

public InstructionBuilder increment(LocalVariable variable)

Description copied from interface: InstructionBuilder

Increments a local integer variable.

Specified by:

increment in interface InstructionBuilder

Returns:

this builder

arrayLength

public InstructionBuilder arrayLength()

Description copied from interface: InstructionBuilder

Expects the top object on the stack to be an array. Replaces it with the length of that array.

Specified by:

arrayLength in interface InstructionBuilder

iterateArray

public InstructionBuilder iterateArray(InstructionBuilderCallback callback)

Description copied from interface: InstructionBuilder

Expects an array to be the top value on the stack. Iterates the array. The callback generates code that will have each successive value from the array as the top value on the stack. Creates a variable to store the loop index.

Specified by:

iterateArray in interface InstructionBuilder

Parameters:

callback - to invoke. The element will be the top value on the stack. The callback is responsible for removing it from the stack.

Returns:

this builder

dupeWide

public InstructionBuilder dupeWide()

Description copied from interface: InstructionBuilder

Duplicates a wide value (a primitive long or double).

Specified by:

dupeWide in interface InstructionBuilder

popWide

public InstructionBuilder popWide()

Description copied from interface: InstructionBuilder

Pops a wide value (a primitive long or double).

Specified by:

popWide in interface InstructionBuilder

compareSpecial

public InstructionBuilder compareSpecial(String typeName)

Description copied from interface: InstructionBuilder

Special comparison logic for primitive float, double and long. Expect two matching wide values on the stack. Reduces the two wide values to a single int value: -1, 0, or 1 depending on whether the deeper value is less than, equal to, or greater than the top value on the stack.

Specified by:

compareSpecial in interface InstructionBuilder