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/*******************************************************************************
* Copyright (c) 2006, 2014 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.runtime.spi;
import org.eclipse.core.runtime.IContributor;
/**
* This class describes a registry contributor which is an entity that supplies information
* to the extension registry. Depending on the registry strategy, contributor might delegate
* some of its functionality to a "host" contributor. For instance, OSGi registry strategy
* uses "host" contributor to delegate some functionality from fragments to plug-ins.
* <p>
* This class can be instantiated by the registry Service Providers.
* </p><p>
* This class can be used without OSGi running.
* </p><p>
* This class can not be extended.
* </p>
* @since org.eclipse.equinox.registry 3.2
* @noextend This class is not intended to be subclassed by clients.
*/
public final class RegistryContributor implements IContributor {
/**
* Actual ID of the contributor (e.g., "12"). IDs are expected to be unique in the workspace.
*/
private String actualContributorId;
/**
* Actual name of the contributor (e.g., "org.eclipse.core.runtime.fragment").
*/
private String actualContributorName;
/**
* ID associated with the entity "in charge" of the contributor (e.g., "1"). IDs are expected
* to be unique in the workspace. If contributor does not rely on a host, this value should be
* the same as the actual contributor ID.
*/
private String hostId;
/**
* Name of the entity "in charge" of the contributor (e.g. "org.eclipse.core.runtime").
* If contributor does not rely on a host, this value should be the same as the actual
* contributor name.
*/
private String hostName;
/**
* Constructor for the registry contributor.
* <p>
* The actual ID is a string identifier for the contributor (e.g., "12") and is expected
* to be unique within the workspace. The actual ID of the contributor must not
* be <code>null</code>.
* </p><p>
* The actual name is the name associated with the contributor
* (e.g., "org.eclipse.core.runtime.fragment"). The actual name of the contributor must
* not be <code>null</code>.
* </p><p>
* The host ID is the identifier associated with the entity "in charge" of the contributor
* (e.g., "1"). IDs are expected to be unique in the workspace. If contributor does not
* rely on a host, then <code>null</code> should be used as the host ID.
* </p><p>
* The host name is the name of the entity "in charge" of the contributor
* (e.g., "org.eclipse.core.runtime"). If contributor does not rely on a host, then
* <code>null</code> should be used as the host name.
* </p><p>
* There should be 1-to-1 mapping between the contributor and the contibutor ID.
* The IDs (either actual or host) can not be re-used in the same registry.
* For example, if ID of 12 was used to identify contributorA, the ID of 12 can not
* be used to identify contributorB or a host for the contributorC.
* </p>
* @param actualId contributor identifier
* @param actualName name of the contributor
* @param hostId id associated with the host, or <code>null</code>
* @param hostName name of the host, or <code>null</code>
*/
public RegistryContributor(String actualId, String actualName, String hostId, String hostName) {
this.actualContributorId = actualId;
this.actualContributorName = actualName;
if (hostId != null) {
this.hostId = hostId;
this.hostName = hostName;
} else {
this.hostId = actualId;
this.hostName = actualName;
}
}
/**
* Provides actual ID associated with the registry contributor (e.g., "12"). IDs are expected
* to be unique in the workspace.
*
* @return actual ID of the registry contributor
*/
public String getActualId() {
return actualContributorId;
}
/**
* Provides actual name of the registry contributor (e.g., "org.eclipe.core.runtime.fragment").
*
* @return actual name of the registry contributor
*/
public String getActualName() {
return actualContributorName;
}
/**
* Provides ID associated with the entity "in charge" of the contributor (e.g., "1"). IDs are expected
* to be unique in the workspace. If contributor does not rely on a host, this value should be
* the same as the actual contributor ID.
*
* @return id of the registry contributor
*/
public String getId() {
return hostId;
}
/**
* Provides name of the entity "in charge" of the contributor (e.g., "org.eclipse.core.runtime").
* If contributor does not rely on a host, this value should be the same as the actual contributor name.
*
* @return name of the registry contributor
*/
@Override
public String getName() {
return hostName;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return actualContributorName + "[" + actualContributorId + "]"; //$NON-NLS-1$ //$NON-NLS-2$
}
}
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