org.apache.felix.scr.impl.inject

Class ValueUtils

java.lang.Object

org.apache.felix.scr.impl.inject.ValueUtils

public class ValueUtils
extends java.lang.Object

Utility methods for handling references and activation

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	ValueUtils.MapEntryImpl Comparable map entry using the service reference to compare.
static class	ValueUtils.ValueType The value type of the field, activation field or constructor parameter

Field Summary

Fields

Modifier and Type	Field and Description
static ValueUtils.ValueType[]	EMPTY_VALUE_TYPES Empty array.

Constructor Summary

Constructors

Constructor and Description
ValueUtils()

Method Summary

Modifier and Type	Method and Description
private static java.lang.Object	getLogger(java.lang.String componentType, java.lang.Class<?> targetType, ComponentContextImpl componentContext, RefPair<?,?> refPair)
static ValueUtils.ValueType	getReferenceValueType(java.lang.Class<?> componentClass, ReferenceMetadata metadata, java.lang.Class<?> typeClass, java.lang.reflect.Field field, ComponentLogger logger) Get the value type of the reference for a field/constructor argument
static java.lang.Object	getValue(java.lang.String componentType, ValueUtils.ValueType type, java.lang.Class<?> targetType, ComponentContextImpl componentContext, RefPair<?,?> refPair) Get the value for the value type
static ValueUtils.ValueType	getValueType(java.lang.Class<?> typeClass) Get the value type for the parameter class.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_VALUE_TYPES

public static final ValueUtils.ValueType[] EMPTY_VALUE_TYPES

Empty array.

Constructor Detail

ValueUtils

public ValueUtils()

Method Detail

getValueType

public static ValueUtils.ValueType getValueType(java.lang.Class<?> typeClass)

Get the value type for the parameter class. This method is used for field activation and constructor injection.

Parameters:

typeClass - The class of the parameter

Returns:

The value type

getReferenceValueType

public static ValueUtils.ValueType getReferenceValueType(java.lang.Class<?> componentClass,
                                                         ReferenceMetadata metadata,
                                                         java.lang.Class<?> typeClass,
                                                         java.lang.reflect.Field field,
                                                         ComponentLogger logger)

Get the value type of the reference for a field/constructor argument

Parameters:

componentClass - The component class declaring the reference

metadata - The reference metadata

typeClass - The type of the field/parameter

f - The optional field. If null this is a constructor reference

logger - The logger

Returns:

The value type for the field. If invalid, ValueType#ignore

getValue

public static java.lang.Object getValue(java.lang.String componentType,
                                        ValueUtils.ValueType type,
                                        java.lang.Class<?> targetType,
                                        ComponentContextImpl componentContext,
                                        RefPair<?,?> refPair)

Get the value for the value type

Parameters:

componentType - The class of the component

type - The value type

targetType - Optional target type, only required for type ValueType#config_annotation.

componentContext - The component context

refPair - The ref pair

Returns:

The value or null.

getLogger

private static java.lang.Object getLogger(java.lang.String componentType,
                                          java.lang.Class<?> targetType,
                                          ComponentContextImpl componentContext,
                                          RefPair<?,?> refPair)