org.elasticsearch.painless

Class DefMath

java.lang.Object

org.elasticsearch.painless.DefMath

public class DefMath
extends java.lang.Object

Dynamic operators for painless.

Each operator must "support" the following types: int,long,float,double,boolean,Object. Operators can throw exceptions if the type is illegal. The Object type must be a "generic" handler that handles all legal types: it must be convertible to every possible legal signature.

Constructor Summary

Constructors

Constructor and Description
DefMath()

Method Summary

Modifier and Type	Method and Description
static java.lang.invoke.MethodHandle	cast(java.lang.Class<?> classA, java.lang.invoke.MethodHandle target) Forces a cast to class A for target (only if types differ)
static java.lang.invoke.MethodHandle	dynamicCast(java.lang.invoke.MethodHandle target) Looks up generic method, with a dynamic cast to the receiver's type.
static java.lang.invoke.MethodHandle	dynamicCast(java.lang.invoke.MethodHandle target, java.lang.Class<?> desired) Looks up generic method, with a dynamic cast to the specified type.
static java.lang.invoke.MethodHandle	lookupBinary(java.lang.Class<?> classA, java.lang.Class<?> classB, java.lang.String name) Returns an appropriate method handle for a binary operator, based on promotion of the LHS and RHS arguments
static java.lang.invoke.MethodHandle	lookupGeneric(java.lang.String name) Returns a generic method handle for any operator, that can handle all valid signatures, nulls, corner cases
static java.lang.invoke.MethodHandle	lookupUnary(java.lang.Class<?> receiverClass, java.lang.String name) Returns an appropriate method handle for a unary or shift operator, based only on the receiver (LHS)
static java.lang.Object	lsh(java.lang.Object left, long right)
static java.lang.Object	rsh(java.lang.Object left, long right)
static java.lang.Object	ush(java.lang.Object left, long right)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefMath

public DefMath()

Method Detail

lsh

public static java.lang.Object lsh(java.lang.Object left,
                                   long right)

rsh

public static java.lang.Object rsh(java.lang.Object left,
                                   long right)

ush

public static java.lang.Object ush(java.lang.Object left,
                                   long right)

lookupUnary

public static java.lang.invoke.MethodHandle lookupUnary(java.lang.Class<?> receiverClass,
                                                        java.lang.String name)

Returns an appropriate method handle for a unary or shift operator, based only on the receiver (LHS)

lookupBinary

public static java.lang.invoke.MethodHandle lookupBinary(java.lang.Class<?> classA,
                                                         java.lang.Class<?> classB,
                                                         java.lang.String name)

Returns an appropriate method handle for a binary operator, based on promotion of the LHS and RHS arguments

lookupGeneric

public static java.lang.invoke.MethodHandle lookupGeneric(java.lang.String name)

Returns a generic method handle for any operator, that can handle all valid signatures, nulls, corner cases

dynamicCast

public static java.lang.invoke.MethodHandle dynamicCast(java.lang.invoke.MethodHandle target)

Looks up generic method, with a dynamic cast to the receiver's type. (compound assignment)

dynamicCast

public static java.lang.invoke.MethodHandle dynamicCast(java.lang.invoke.MethodHandle target,
                                                        java.lang.Class<?> desired)

Looks up generic method, with a dynamic cast to the specified type. (explicit assignment)

cast

public static java.lang.invoke.MethodHandle cast(java.lang.Class<?> classA,
                                                 java.lang.invoke.MethodHandle target)

Forces a cast to class A for target (only if types differ)