Package org.glassfish.pfl.dynamic.codegen.impl

Class EmitterFactory

java.lang.Object

org.glassfish.pfl.dynamic.codegen.impl.EmitterFactory

public final class EmitterFactory
extends Object

This class provides methods that allow the construction of an object that can later be used to emit a bytecode. This is useful when multiple visitors are needed for first preparing an AST, then generating the bytecode.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EmitterFactory.CompoundEmitter
static interface	EmitterFactory.Emitter	Simple wrapper class around a UnaryVoidFunction.
static class	EmitterFactory.NullEmitter
static class	EmitterFactory.SimpleEmitter

Method Summary

Modifier and Type	Method	Description
static EmitterFactory.Emitter	makeEmitter(ExpressionFactory.ArrayIndexExpression expr, boolean isStore)	Create an emitter that generates the instruction needed to either store the TOS value into an array (aastore) (isStore==true) or push the array element's value onto the stack (aaload) (isStore==false).
static EmitterFactory.Emitter	makeEmitter(ExpressionFactory.ArrayLengthExpression expr)
static EmitterFactory.Emitter	makeEmitter(ExpressionFactory.NonStaticFieldAccessExpression expr, boolean isStore)	Create an emitter that generates the instruction needed to either store the TOS value into the non-static field (isStore==true) or push the non-static fields's value onto the stack (isStore==false).
static EmitterFactory.Emitter	makeEmitter(ExpressionFactory.StaticFieldAccessExpression expr, boolean isStore)	Create an emitter that generates the instruction needed to either store the TOS value into the static field (isStore==true) or push the static fields's value onto the stack (isStore==false).
static EmitterFactory.Emitter	makeEmitter(Variable var, boolean isStore)	Create an emitter that generates the instruction needed to either store the TOS value into the variable (isStore==true) or push the variable's value onto the stack (isStore==false).

Methods inherited from class java.lang.Object

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

Method Details

makeEmitter

public static EmitterFactory.Emitter makeEmitter(Variable var,
 boolean isStore)

Create an emitter that generates the instruction needed to either store the TOS value into the variable (isStore==true) or push the variable's value onto the stack (isStore==false). The stack index must be set on var in the stackFrameSlot attribute.

makeEmitter

public static EmitterFactory.Emitter makeEmitter(ExpressionFactory.NonStaticFieldAccessExpression expr,
 boolean isStore)

Create an emitter that generates the instruction needed to either store the TOS value into the non-static field (isStore==true) or push the non-static fields's value onto the stack (isStore==false).

makeEmitter

public static EmitterFactory.Emitter makeEmitter(ExpressionFactory.StaticFieldAccessExpression expr,
 boolean isStore)

Create an emitter that generates the instruction needed to either store the TOS value into the static field (isStore==true) or push the static fields's value onto the stack (isStore==false).

makeEmitter

public static EmitterFactory.Emitter makeEmitter(ExpressionFactory.ArrayIndexExpression expr,
 boolean isStore)

Create an emitter that generates the instruction needed to either store the TOS value into an array (aastore) (isStore==true) or push the array element's value onto the stack (aaload) (isStore==false). This emitter assumes that arrayref and index are already on the stack, and value is on the stack either before (aastore) or after (aaload) the instruction executes.

makeEmitter

public static EmitterFactory.Emitter makeEmitter(ExpressionFactory.ArrayLengthExpression expr)