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jclouds Core components to access OpenStack apis
/*
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds 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.jclouds.openstack.predicates;
import static com.google.common.base.Preconditions.checkNotNull;
import java.net.URI;
import org.jclouds.openstack.domain.Link;
import org.jclouds.openstack.domain.Link.Relation;
import com.google.common.base.Predicate;
/**
* Predicates handy when working with Link Types
*
* @author Adrian Cole
*/
public class LinkPredicates {
/**
* matches links of the given relation
*
* @param rel relation of the link
* @return predicate that will match links of the given rel
*/
public static Predicate relationEquals(final Relation rel) {
checkNotNull(rel, "rel must be defined");
return new Predicate() {
@Override
public boolean apply(Link link) {
return rel.equals(link.getRelation());
}
@Override
public String toString() {
return "relEquals(" + rel + ")";
}
};
}
/**
* matches links of the given href
*
* @param href
* @return predicate that will match links of the given href
*/
public static Predicate hrefEquals(final URI href) {
checkNotNull(href, "href must be defined");
return new Predicate() {
@Override
public boolean apply(Link link) {
return href.equals(link.getHref());
}
@Override
public String toString() {
return "hrefEquals(" + href + ")";
}
};
}
/**
* matches links of the given type
*
* @param type
* ex. application/pdf
* @return predicate that will match links of the given type
*/
public static Predicate typeEquals(final String type) {
checkNotNull(type, "type must be defined");
return new Predicate() {
@Override
public boolean apply(Link link) {
return type.equals(link.getType());
}
@Override
public String toString() {
return "typeEquals(" + type + ")";
}
};
}
}
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