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  * Copyright (c) OSGi Alliance (2011, 2012). All Rights Reserved.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.osgi.resource;
A requirement that has been declared from a Resource .

Instances of this type must be effectively immutable. That is, for a given instance of this interface, the methods defined by this interface must always return the same result.

$Id: 212b26179910f98fd2c59c3e1e7dd0d086f42b5d $
public interface Requirement {
Returns the namespace of this requirement.

The namespace of this requirement.
Returns the directives of this requirement.

An unmodifiable map of directive names to directive values for this requirement, or an empty map if this requirement has no directives.
Returns the attributes of this requirement.

Requirement attributes have no specified semantics and are considered extra user defined information.

An unmodifiable map of attribute names to attribute values for this requirement, or an empty map if this requirement has no attributes.
Returns the resource declaring this requirement.

The resource declaring this requirement. This can be null if this requirement is synthesized.
Compares this Requirement to another Requirement.

This Requirement is equal to another Requirement if they have the same namespace, directives and attributes and are declared by the same resource.

obj The object to compare against this Requirement.
true if this Requirement is equal to the other object; false otherwise.
	boolean equals(Object obj);

Returns the hashCode of this Requirement.

The hashCode of this Requirement.
	int hashCode();
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