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## org.eclipse.gemini.blueprint.service.importer.support.internal.util
Class ServiceReferenceComparator

    java.lang.Object
      org.eclipse.gemini.blueprint.service.importer.support.internal.util.ServiceReferenceComparator

All Implemented Interfaces:
  Serializable, Comparator

    public class ServiceReferenceComparator

extends Object
implements Comparator, Serializable

Default comparator for sorted collections. It uses the service id property of an OSGi service to determine the order. Thus, by using this comparator, the services added to a collection will be sorted in the order in which they are published to the OSGi platform.

This comparator version, provides natural ordering for service references for pre OSGI 4.1 platforms, using the contract from OSGi 4.1 spec:

> If this ServiceReference and the specified ServiceReference have the same service id they are equal. This ServiceReference is less than the specified ServiceReference if it has a lower service ranking and greater if it has a higher service ranking. Otherwise, if this ServiceReference and the specified ServiceReference have the same service ranking, this ServiceReference is less than the specified ServiceReference if it has a higher service id and greater if it has a lower service id.

Author:
  Costin Leau
See Also:
  `Comparator`, Serialized Form

Constructor Summary
`ServiceReferenceComparator()`

Method Summary
`int` | `compare(Object o1, Object o2)`
`boolean` | `equals(Object obj)`
`int` | `hashCode()`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ServiceReferenceComparator

    public ServiceReferenceComparator()

Method Detail

### compare

    public int compare(Object o1,
                       Object o2)

  Specified by:
    `compare` in interface `Comparator`

### equals

    public boolean equals(Object obj)

  Specified by:
    `equals` in interface `Comparator`
  Overrides:
    `equals` in class `Object`

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Object`

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