org.springframework.expression.spel

Enum SpelCompilerMode

java.lang.Object

java.lang.Enum<SpelCompilerMode>

org.springframework.expression.spel.SpelCompilerMode

All Implemented Interfaces:

Serializable, Comparable<SpelCompilerMode>

public enum SpelCompilerMode
extends Enum<SpelCompilerMode>

Captures the possible configuration settings for a compiler that can be used when evaluating expressions.

Since:

4.1

Author:

Andy Clement

Enum Constant Summary

Enum Constants

Enum Constant and Description
IMMEDIATE In immediate mode, expressions are compiled as soon as possible (usually after 1 interpreted run).
MIXED In mixed mode, expression evaluation silently switches between interpreted and compiled over time.
OFF The compiler is switched off; this is the default.

Method Summary

Modifier and Type	Method and Description
static SpelCompilerMode	valueOf(String name) Returns the enum constant of this type with the specified name.
static SpelCompilerMode[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

OFF

public static final SpelCompilerMode OFF

The compiler is switched off; this is the default.

IMMEDIATE

public static final SpelCompilerMode IMMEDIATE

In immediate mode, expressions are compiled as soon as possible (usually after 1 interpreted run). If a compiled expression fails it will throw an exception to the caller.

MIXED

public static final SpelCompilerMode MIXED

In mixed mode, expression evaluation silently switches between interpreted and compiled over time. After a number of runs the expression gets compiled. If it later fails (possibly due to inferred type information changing) then that will be caught internally and the system switches back to interpreted mode. It may subsequently compile it again later.

Method Detail

values

public static SpelCompilerMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (SpelCompilerMode c : SpelCompilerMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SpelCompilerMode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null