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/*******************************************************************************
* Copyright (c) 2007, 2017 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
* EclipseSource - ongoing development
* SAP - ongoing development
*******************************************************************************/
package org.eclipse.equinox.internal.p2.metadata;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.eclipse.core.runtime.Assert;
import org.eclipse.equinox.p2.metadata.IProvidedCapability;
import org.eclipse.equinox.p2.metadata.Version;
import org.eclipse.equinox.p2.metadata.expression.IMemberProvider;
import org.eclipse.osgi.util.NLS;
/**
* Describes a capability as exposed or required by an installable unit
*/
public class ProvidedCapability implements IProvidedCapability, IMemberProvider {
/** Used for fast access from P2 queries to the {@link #getNamespace} method */
public static final String MEMBER_NAMESPACE = "namespace"; //$NON-NLS-1$
/** Used for fast access from P2 queries to the {@link #getName} method */
public static final String MEMBER_NAME = "name"; //$NON-NLS-1$
/** Used for fast access from P2 queries to the {@link #getVersion} method */
public static final String MEMBER_VERSION = "version"; //$NON-NLS-1$
/** Used for fast access from P2 queries to the {@link #getAttributes} method */
public static final String MEMBER_ATTRIBUTES = "attributes"; //$NON-NLS-1$
// TODO Move this to IProvidedCapability?
// The "version" attribute is part of the public contract of getVersion() and getAttributes()
public static final String ATTRIBUTE_VERSION = "version"; //$NON-NLS-1$
private final String namespace;
private final Map<String, Object> attributes;
public ProvidedCapability(String namespace, Map<String, Object> attrs) {
Assert.isNotNull(namespace, NLS.bind(Messages.provided_capability_namespace_not_defined, null));
this.namespace = namespace;
Assert.isNotNull(attrs);
Assert.isTrue(!attrs.isEmpty());
this.attributes = new HashMap<>(attrs);
// Verify the name
Assert.isTrue(attributes.containsKey(namespace) && (attributes.get(namespace) instanceof String), NLS.bind(Messages.provided_capability_name_not_defined, namespace));
// Verify the version
Object version = attributes.get(ATTRIBUTE_VERSION);
if (version != null) {
Assert.isTrue(attributes.get(ATTRIBUTE_VERSION) instanceof Version);
} else {
attributes.put(ATTRIBUTE_VERSION, Version.emptyVersion);
}
}
public ProvidedCapability(String namespace, String name, Version version) {
Assert.isNotNull(namespace, NLS.bind(Messages.provided_capability_namespace_not_defined, null));
Assert.isNotNull(name, NLS.bind(Messages.provided_capability_name_not_defined, namespace));
this.namespace = namespace;
this.attributes = new HashMap<>();
attributes.put(namespace, name);
attributes.put(ATTRIBUTE_VERSION, version == null ? Version.emptyVersion : version);
}
@Override
public boolean equals(Object other) {
if (other == null) {
return false;
}
if (!(other instanceof IProvidedCapability)) {
return false;
}
IProvidedCapability otherCapability = (IProvidedCapability) other;
if (!(namespace.equals(otherCapability.getNamespace()))) {
return false;
}
if (!(attributes.equals(otherCapability.getAttributes()))) {
return false;
}
return true;
}
@Override
public String getNamespace() {
return namespace;
}
@Override
public String getName() {
return (String) attributes.get(namespace);
}
@Override
public Version getVersion() {
return (Version) attributes.get(ATTRIBUTE_VERSION);
}
@Override
public Map<String, Object> getAttributes() {
return attributes;
}
@Override
public int hashCode() {
return namespace.hashCode() * attributes.hashCode();
}
@Override
public String toString() {
StringBuilder str = new StringBuilder();
str.append(namespace);
for (Entry<String, Object> attr : attributes.entrySet()) {
String key = attr.getKey();
Object val = attr.getValue();
String type = val.getClass().getSimpleName();
str.append("; ").append(key).append(":").append(type).append("=").append(val); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
return str.toString();
}
@Override
public Object getMember(String memberName) {
switch (memberName) {
case MEMBER_NAMESPACE :
return namespace;
case MEMBER_NAME :
return attributes.get(namespace);
case MEMBER_VERSION :
return attributes.get(ATTRIBUTE_VERSION);
case MEMBER_ATTRIBUTES :
return attributes;
default :
throw new IllegalArgumentException("No such member: " + memberName); //$NON-NLS-1$
}
}
}
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