/
JsonHyperSchema.java
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/
JsonHyperSchema.java
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package com.mercateo.common.rest.schemagen;
import static java.util.Objects.requireNonNull;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.core.Link;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.annotations.VisibleForTesting;
import com.mercateo.common.rest.schemagen.link.LinkCreator;
import com.mercateo.common.rest.schemagen.link.helper.JsonLink;
import com.mercateo.common.rest.schemagen.link.relation.RelationContainer;
public class JsonHyperSchema {
@XmlJavaTypeAdapter(JaxbAdapter.class)
private List<Link> links;
public JsonHyperSchema(@JsonProperty("links") Collection<Link> links) {
this(links.stream());
}
public JsonHyperSchema(Stream<Link> linkStream) {
this.links = requireNonNull(linkStream).filter(Objects::nonNull).collect(Collectors.toList());
}
public List<Link> getLinks() {
return links;
}
@VisibleForTesting
public Optional<Link> getByRel(RelationContainer rel) {
return links.stream().filter(e -> e.getRel().equals(rel.getRelation().getName())).findFirst();
}
public void setLinks(List<Link> links) {
this.links = links;
}
public static class JaxbAdapter extends XmlAdapter<JsonLink, Link> {
@Override
public Link unmarshal(JsonLink v) {
Link.Builder lb = Link.fromUri(v.getHref());
if (v.getMap() != null) {
for (Entry<String, String> en : v.getMap().entrySet()) {
lb.param(en.getKey(), en.getValue());
}
}
if (v.getSchema() != null) {
lb.param(LinkCreator.SCHEMA_PARAM_KEY, v.getSchema().toString());
}
if (v.getTargetSchema() != null) {
lb.param(LinkCreator.TARGET_SCHEMA_PARAM_KEY, v.getTargetSchema().toString());
}
return lb.build();
}
@Override
public JsonLink marshal(Link v) {
try {
return new JsonLink(v);
} catch (IOException e) {
throw new ProcessingException(e);
}
}
}
public static JsonHyperSchema from(Link... links) {
return new JsonHyperSchema(Arrays.stream(links));
}
@SafeVarargs
public static JsonHyperSchema from(Optional<Link>... links) {
Stream<Optional<Link>> stream = Arrays.stream(links);
return new JsonHyperSchema(filterOptionals(stream));
}
public static JsonHyperSchema from(Collection<Link> links) {
return new JsonHyperSchema(links);
}
public static JsonHyperSchema fromOptional(Collection<Optional<Link>> links) {
return new JsonHyperSchema(filterOptionals(links.stream()));
}
private static <T> Stream<T> filterOptionals(Stream<Optional<T>> streamWithOptionals) {
return streamWithOptionals.filter(Objects::nonNull).flatMap(e -> e.map(Stream::of).orElse(Stream.empty()));
}
@Override
public String toString() {
return "JsonHyperSchema{" +
"links=" + links +
'}';
}
}