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Core Katharsis library
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package io.katharsis.resource;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * “Resource objects” appear in a JSON API document to represent resources.
 * 
 * http://jsonapi.org/format/#document-resource-objects
 */
public class Resource extends ResourceIdentifier implements MetaContainer, LinksContainer {

	@JsonInclude(Include.NON_EMPTY)
	private Map attributes = new HashMap<>();

	@JsonInclude(Include.NON_EMPTY)
	private Map relationships = new HashMap<>();

	@JsonInclude(Include.NON_EMPTY)
	private ObjectNode links;

	@JsonInclude(Include.NON_EMPTY)
	private ObjectNode meta;

	@Override
	public ObjectNode getLinks() {
		return links;
	}

	@Override
	public void setLinks(ObjectNode links) {
		this.links = links;
	}

	@Override
	public ObjectNode getMeta() {
		return meta;
	}

	@Override
	public void setMeta(ObjectNode meta) {
		this.meta = meta;
	}

	public Map getAttributes() {
		return attributes;
	}

	public void setAttributes(Map attributes) {
		this.attributes = attributes;
	}

	public Map getRelationships() {
		return relationships;
	}

	public void setRelationships(Map relationships) {
		this.relationships = relationships;
	}

	public void setAttribute(String name, JsonNode value) {
		attributes.put(name, value);
	}

	@Override
	public int hashCode() {
		return Objects.hash(attributes, relationships, links, meta);
	}

	@Override
	public boolean equals(Object obj) {
		if (!(obj instanceof Resource))
			return false;
		Resource other = (Resource) obj;
		return Objects.equals(attributes, other.attributes) && Objects.equals(relationships, other.relationships) && Objects.equals(meta, other.meta) && Objects.equals(links, other.links);
	}

	public ResourceIdentifier toIdentifier() {
		return new ResourceIdentifier(getId(), getType());
	}

}