/*
* 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
*
* 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.archive;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.aries.subsystem.core.archive.BundleRequiredExecutionEnvironmentHeader.Clause.ExecutionEnvironment;
import org.apache.aries.subsystem.core.internal.AbstractRequirement;
import org.osgi.framework.Version;
import org.osgi.framework.namespace.ExecutionEnvironmentNamespace;
import org.osgi.resource.Resource;
public class OsgiExecutionEnvironmentRequirement extends AbstractRequirement {
public static final String ATTRIBUTE_VERSION = ExecutionEnvironmentNamespace.CAPABILITY_VERSION_ATTRIBUTE;
public static final String DIRECTIVE_FILTER = ExecutionEnvironmentNamespace.REQUIREMENT_FILTER_DIRECTIVE;
public static final String NAMESPACE = ExecutionEnvironmentNamespace.EXECUTION_ENVIRONMENT_NAMESPACE;
private final Map<String, String> directives;
private final Resource resource;
public OsgiExecutionEnvironmentRequirement(BundleRequiredExecutionEnvironmentHeader.Clause clause, Resource resource) {
this(Collections.singleton(clause), resource);
}
public OsgiExecutionEnvironmentRequirement(Collection<BundleRequiredExecutionEnvironmentHeader.Clause> clauses, Resource resource) {
if (clauses.isEmpty()) {
throw new IllegalArgumentException();
}
if (resource == null) {
throw new NullPointerException();
}
StringBuilder filter = new StringBuilder();
if (clauses.size() > 1) {
filter.append("(|");
}
for (BundleRequiredExecutionEnvironmentHeader.Clause clause : clauses) {
ExecutionEnvironment ee = clause.getExecutionEnvironment();
Version version = ee.getVersion();
if (version != null) {
filter.append("(&");
}
filter.append("(").append(NAMESPACE).append('=').append(ee.getName()).append(')');
if (version != null) {
filter.append('(').append(ATTRIBUTE_VERSION).append('=').append(version).append("))");
}
}
if (clauses.size() > 1) {
filter.append(')');
}
directives = new HashMap<String, String>(1);
directives.put(DIRECTIVE_FILTER, filter.toString());
this.resource = resource;
}
@Override
public Map<String, Object> getAttributes() {
return Collections.emptyMap();
}
@Override
public Map<String, String> getDirectives() {
return Collections.unmodifiableMap(directives);
}
@Override
public String getNamespace() {
return NAMESPACE;
}
@Override
public Resource getResource() {
return resource;
}
}