com.facebook.presto.bytecode.expression

Class BytecodeExpression

java.lang.Object

com.facebook.presto.bytecode.expression.BytecodeExpression

All Implemented Interfaces:

BytecodeNode

Direct Known Subclasses:

ArithmeticBytecodeExpression, CastBytecodeExpression, StaticTypeBytecodeExpression, Variable

public abstract class BytecodeExpression
extends Object
implements BytecodeNode

A BytecodeExpression is chain of Java like expressions that results in at most a single value being pushed on the stack. The chain starts with a constant, local variable, static field, static method or invoke dynamic followed by zero or more invocations, field dereferences, array element fetches, or casts. The expression can optionally be terminated by a set expression, and in this case no value is pushed on the stack.

A BytecodeExpression is a BytecodeNode so it works with tools like tree dump.

This abstraction makes it easy to write generic byte code generators that can work with data that may come from a parameter, field or the result of a method invocation.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BytecodeExpression(ParameterizedType type)

Method Summary

Modifier and Type	Method and Description
<T> T	accept(BytecodeNode parent, BytecodeVisitor<T> visitor)
void	accept(org.objectweb.asm.MethodVisitor visitor, MethodGenerationContext generationContext)
BytecodeExpression	cast(Class<?> type)
BytecodeExpression	cast(ParameterizedType type)
protected abstract String	formatOneLine()
abstract BytecodeNode	getBytecode(MethodGenerationContext generationContext)
BytecodeExpression	getElement(BytecodeExpression index)
BytecodeExpression	getElement(int index)
BytecodeExpression	getField(Class<?> declaringClass, String name)
BytecodeExpression	getField(Field field)
BytecodeExpression	getField(FieldDefinition field)
BytecodeExpression	getField(ParameterizedType declaringClass, String name, ParameterizedType type)
BytecodeExpression	getField(String name, Class<?> type)
ParameterizedType	getType()
BytecodeExpression	instanceOf(Class<?> type)
BytecodeExpression	invoke(Method method, BytecodeExpression... parameters)
BytecodeExpression	invoke(MethodDefinition method, Iterable<? extends BytecodeExpression> parameters)
BytecodeExpression	invoke(Method method, Iterable<? extends BytecodeExpression> parameters)
BytecodeExpression	invoke(String methodName, Class<?> returnType, BytecodeExpression... parameters)
BytecodeExpression	invoke(String methodName, Class<?> returnType, Iterable<? extends BytecodeExpression> parameters)
BytecodeExpression	invoke(String methodName, Class<?> returnType, Iterable<? extends Class<?>> parameterTypes, BytecodeExpression... parameters)
BytecodeExpression	invoke(String methodName, ParameterizedType returnType, Iterable<? extends BytecodeExpression> parameters)
BytecodeExpression	invoke(String methodName, ParameterizedType returnType, Iterable<ParameterizedType> parameterTypes, BytecodeExpression... parameters)
BytecodeExpression	invoke(String methodName, ParameterizedType returnType, Iterable<ParameterizedType> parameterTypes, Iterable<? extends BytecodeExpression> parameters)
BytecodeExpression	length()
BytecodeExpression	pop()
BytecodeExpression	ret()
BytecodeExpression	setElement(BytecodeExpression index, BytecodeExpression value)
BytecodeExpression	setElement(int index, BytecodeExpression value)
BytecodeExpression	setField(Field field, BytecodeExpression value)
BytecodeExpression	setField(FieldDefinition field, BytecodeExpression value)
BytecodeExpression	setField(String name, BytecodeExpression value)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.facebook.presto.bytecode.BytecodeNode

getChildNodes

Constructor Detail

BytecodeExpression

protected BytecodeExpression(ParameterizedType type)

Method Detail

getType

public final ParameterizedType getType()

getBytecode

public abstract BytecodeNode getBytecode(MethodGenerationContext generationContext)

formatOneLine

protected abstract String formatOneLine()

toString

public final String toString()

Overrides:

toString in class Object

getField

public final BytecodeExpression getField(Class<?> declaringClass,
                                         String name)

getField

public final BytecodeExpression getField(String name,
                                         Class<?> type)

getField

public final BytecodeExpression getField(Field field)

getField

public final BytecodeExpression getField(FieldDefinition field)

getField

public final BytecodeExpression getField(ParameterizedType declaringClass,
                                         String name,
                                         ParameterizedType type)

setField

public final BytecodeExpression setField(String name,
                                         BytecodeExpression value)

setField

public final BytecodeExpression setField(Field field,
                                         BytecodeExpression value)

setField

public final BytecodeExpression setField(FieldDefinition field,
                                         BytecodeExpression value)

cast

public final BytecodeExpression cast(Class<?> type)

cast

public final BytecodeExpression cast(ParameterizedType type)

invoke

public final BytecodeExpression invoke(Method method,
                                       BytecodeExpression... parameters)

invoke

public final BytecodeExpression invoke(MethodDefinition method,
                                       Iterable<? extends BytecodeExpression> parameters)

invoke

public final BytecodeExpression invoke(Method method,
                                       Iterable<? extends BytecodeExpression> parameters)

invoke

public final BytecodeExpression invoke(String methodName,
                                       Class<?> returnType,
                                       BytecodeExpression... parameters)

invoke

public final BytecodeExpression invoke(String methodName,
                                       Class<?> returnType,
                                       Iterable<? extends BytecodeExpression> parameters)

invoke

public final BytecodeExpression invoke(String methodName,
                                       ParameterizedType returnType,
                                       Iterable<? extends BytecodeExpression> parameters)

invoke

public final BytecodeExpression invoke(String methodName,
                                       Class<?> returnType,
                                       Iterable<? extends Class<?>> parameterTypes,
                                       BytecodeExpression... parameters)

invoke

public final BytecodeExpression invoke(String methodName,
                                       ParameterizedType returnType,
                                       Iterable<ParameterizedType> parameterTypes,
                                       BytecodeExpression... parameters)

invoke

public final BytecodeExpression invoke(String methodName,
                                       ParameterizedType returnType,
                                       Iterable<ParameterizedType> parameterTypes,
                                       Iterable<? extends BytecodeExpression> parameters)

getElement

public final BytecodeExpression getElement(int index)

getElement

public final BytecodeExpression getElement(BytecodeExpression index)

setElement

public final BytecodeExpression setElement(int index,
                                           BytecodeExpression value)

setElement

public final BytecodeExpression setElement(BytecodeExpression index,
                                           BytecodeExpression value)

length

public final BytecodeExpression length()

ret

public final BytecodeExpression ret()

pop

public final BytecodeExpression pop()

accept

public final void accept(org.objectweb.asm.MethodVisitor visitor,
                         MethodGenerationContext generationContext)

Specified by:

accept in interface BytecodeNode

accept

public final <T> T accept(BytecodeNode parent,
                          BytecodeVisitor<T> visitor)

Specified by:

accept in interface BytecodeNode

instanceOf

public BytecodeExpression instanceOf(Class<?> type)