/*
* 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.isis.viewer.restfulobjects.server.resources;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Properties;
import com.google.common.io.Resources;
import org.apache.isis.viewer.restfulobjects.applib.JsonRepresentation;
import org.apache.isis.viewer.restfulobjects.applib.Rel;
import org.apache.isis.viewer.restfulobjects.applib.RepresentationType;
import org.apache.isis.viewer.restfulobjects.rendering.LinkBuilder;
import org.apache.isis.viewer.restfulobjects.rendering.LinkFollowSpecs;
import org.apache.isis.viewer.restfulobjects.rendering.RendererContext;
import org.apache.isis.viewer.restfulobjects.rendering.ReprRendererAbstract;
import org.apache.isis.viewer.restfulobjects.server.RestfulObjectsApplication;
public class VersionReprRenderer extends ReprRendererAbstract<VersionReprRenderer, Void> {
private static final String META_INF_POM_PROPERTIES = "/META-INF/maven/org.apache.isis.viewer/isis-viewer-restfulobjects-server/pom.properties";
VersionReprRenderer(final RendererContext resourceContext, final LinkFollowSpecs linkFollower, final JsonRepresentation representation) {
super(resourceContext, linkFollower, RepresentationType.VERSION, representation);
}
@Override
public VersionReprRenderer with(final Void t) {
return this;
}
@Override
public JsonRepresentation render() {
if (includesSelf) {
addLinkToSelf();
addLinkToUp();
}
representation.mapPut("specVersion", RestfulObjectsApplication.SPEC_VERSION);
representation.mapPut("implVersion", versionFromManifest());
putOptionalCapabilities();
putExtensions();
return representation;
}
private void addLinkToSelf() {
final JsonRepresentation link = LinkBuilder.newBuilder(getRendererContext(), Rel.SELF.getName(), RepresentationType.VERSION, "version").build();
final LinkFollowSpecs linkFollower = getLinkFollowSpecs().follow("links");
if (linkFollower.matches(link)) {
final VersionReprRenderer renderer = new VersionReprRenderer(getRendererContext(), linkFollower, JsonRepresentation.newMap());
link.mapPut("value", renderer.render());
}
getLinks().arrayAdd(link);
}
private void addLinkToUp() {
final JsonRepresentation link = LinkBuilder.newBuilder(rendererContext, Rel.UP.getName(), RepresentationType.HOME_PAGE, "").build();
final LinkFollowSpecs linkFollower = getLinkFollowSpecs().follow("links");
if (linkFollower.matches(link)) {
final HomePageReprRenderer renderer = new HomePageReprRenderer(getRendererContext(), linkFollower, JsonRepresentation.newMap());
link.mapPut("value", renderer.render());
}
getLinks().arrayAdd(link);
}
private static String versionFromManifest() {
try {
URL resource = Resources.getResource(META_INF_POM_PROPERTIES);
Properties p = new Properties();
p.load(Resources.newReaderSupplier(resource, Charset.defaultCharset()).getInput());
return p.getProperty("version");
} catch (final Exception ex) {
return "UNKNOWN";
}
}
private void putOptionalCapabilities() {
final JsonRepresentation optionalCapabilities = JsonRepresentation.newMap();
optionalCapabilities.mapPut("blobsClobs", "yes");
optionalCapabilities.mapPut("deleteObjects", "yes");
optionalCapabilities.mapPut("domainModel", "formal");
optionalCapabilities.mapPut("validateOnly", "yes");
optionalCapabilities.mapPut("protoPersistentObjects", "yes");
representation.mapPut("optionalCapabilities", optionalCapabilities);
}
private void putExtensions() {
representation.mapPut("extensions", JsonRepresentation.newMap());
}
}