/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.aries.subsystem.core.internal;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.apache.aries.subsystem.core.archive.BundleManifest;
import org.apache.aries.subsystem.core.archive.SubsystemManifest;
import org.apache.aries.subsystem.core.archive.SymbolicNameHeader;
import org.apache.aries.subsystem.core.archive.VersionHeader;
import org.osgi.framework.Constants;
import org.osgi.framework.Version;
import org.osgi.framework.namespace.IdentityNamespace;
import org.osgi.resource.Resource;

public class OsgiIdentityCapability extends AbstractCapability {
	private final Map<String, Object> attributes;
	private final Resource resource;

	public OsgiIdentityCapability(Resource resource, String symbolicName) {
		this(resource, symbolicName, Version.emptyVersion);
	}

	public OsgiIdentityCapability(Resource resource, String symbolicName, Version version) {
		this(resource, symbolicName, version, IdentityNamespace.TYPE_BUNDLE);
	}

	public OsgiIdentityCapability(Resource resource, String symbolicName, Version version, String identityType) {
	    this(resource, symbolicName, version, identityType, new HashMap<String, Object>());
	}

    public OsgiIdentityCapability(Resource resource, String symbolicName, Version version, String identityType, Map<String, Object> attrs) {
		this.resource = resource;
		attributes = attrs;
		attributes.put(
				IdentityNamespace.IDENTITY_NAMESPACE,
				symbolicName);
		attributes.put(
				IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE,
				version);
		attributes.put(
				IdentityNamespace.CAPABILITY_TYPE_ATTRIBUTE,
				identityType);
		// TODO Add directives, particularly "effective" and "singleton".
	}

	public OsgiIdentityCapability(Resource resource, SubsystemManifest manifest) {
		this(
				resource,
				manifest.getSubsystemSymbolicNameHeader().getSymbolicName(),
				manifest.getSubsystemVersionHeader().getVersion(),
				manifest.getSubsystemTypeHeader().getType());
	}

	public OsgiIdentityCapability(Resource resource, BundleManifest manifest) {
		this(
				resource,
				((SymbolicNameHeader)manifest.getHeader(Constants.BUNDLE_SYMBOLICNAME)).getSymbolicName(),
				((VersionHeader)manifest.getHeader(Constants.BUNDLE_VERSION)).getVersion(),
				manifest.getHeader(Constants.FRAGMENT_HOST) == null ? IdentityNamespace.TYPE_BUNDLE : IdentityNamespace.TYPE_FRAGMENT);
	}

	public Map<String, Object> getAttributes() {
		return Collections.unmodifiableMap(attributes);
	}

	public Map<String, String> getDirectives() {
		return Collections.emptyMap();
	}

	public String getNamespace() {
		return IdentityNamespace.IDENTITY_NAMESPACE;
	}

	public Resource getResource() {
		return resource;
	}
}
