package geniusweb.references;

import java.net.URI;
import java.net.URISyntaxException;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;

/**
 * A URI reference to create a new instance of a protocol on a party server.
 * There is currently no real protocol server, instead the protocol is created
 * locally on the party server and used only there. Refer to the PartyServer for
 * the available protocols.
 */
public class ProtocolRef implements Reference {
	@JsonValue // serializes nicely but requires custom deserializer.
	private URI protocol;

	@JsonCreator // special: we need URI so no @JsonProperty
	public ProtocolRef(String uri) {
		if (uri == null) {
			throw new IllegalArgumentException("uri=null");
		}
		try {
			this.protocol = new URI(uri);
		} catch (URISyntaxException e) {
			throw new IllegalArgumentException("Illegal string for URI", e);
		}
	}

	public ProtocolRef(URI uri) {
		if (uri == null) {
			throw new IllegalArgumentException("uri=null");
		}
		this.protocol = uri;
	}

	@Override
	public URI getURI() {
		return protocol;
	}

	@Override
	public String toString() {
		return "ProtocolRef[" + protocol + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ ((protocol == null) ? 0 : protocol.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		ProtocolRef other = (ProtocolRef) obj;
		if (protocol == null) {
			if (other.protocol != null)
				return false;
		} else if (!protocol.equals(other.protocol))
			return false;
		return true;
	}
}