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package com.lyncode.xoai.model.oaipmh;

import com.lyncode.xml.exceptions.XmlWriteException;
import com.lyncode.xoai.xml.XmlWriter;
import com.lyncode.xoai.xml.XmlWritable;

import javax.xml.stream.XMLStreamException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class Header implements XmlWritable {
    protected String identifier;
    protected Date datestamp;
    protected List setSpec = new ArrayList();
    protected Status status;

    public String getIdentifier() {
        return identifier;
    }

    public Header withIdentifier(String value) {
        this.identifier = value;
        return this;
    }

    public Date getDatestamp() {
        return datestamp;
    }

    public Header withDatestamp(Date value) {
        this.datestamp = value;
        return this;
    }

    public List getSetSpecs() {
        return this.setSpec;
    }

    public Status getStatus() {
        return status;
    }

    public Header withStatus(Status value) {
        this.status = value;
        return this;
    }

    public Header withSetSpec(String setSpec) {
        this.setSpec.add(setSpec);
        return this;
    }

    public boolean isDeleted () {
        return this.status != null;
    }

    @Override
    public void write(XmlWriter writer) throws XmlWriteException {
        try {
            if (this.status != null)
                writer.writeAttribute("status", this.status.value());
            writer.writeElement("identifier", identifier);
            writer.writeElement("datestamp", datestamp);
            for (String setSpec : this.getSetSpecs())
                writer.writeElement("setSpec", setSpec);
        } catch (XMLStreamException e) {
            throw new XmlWriteException(e);
        }
    }


    public enum Status {
        DELETED("deleted");

        private final String representation;

        Status(String representation) {
            this.representation = representation;
        }

        public String value() {
            return representation;
        }

        public static Status fromRepresentation(String representation) {
            for (Status status : Status.values()) {
                if (status.representation.equals(representation)) {
                    return status;
                }
            }
            throw new IllegalArgumentException(representation);
        }
    }
}