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package io.legaldocml.akn.element;

import com.google.common.collect.ImmutableMap;
import io.legaldocml.akn.AknObject;
import io.legaldocml.akn.attribute.Source;
import io.legaldocml.akn.type.AgentRef;
import io.legaldocml.akn.visitor.AknVisitor;
import io.legaldocml.io.AttributeGetterSetter;
import io.legaldocml.io.XmlReader;
import io.legaldocml.io.XmlWriter;
import io.legaldocml.io.impl.Buffers;

import java.io.IOException;

import static io.legaldocml.akn.AknAttributes.SOURCE;
import static io.legaldocml.akn.AknElements.FRBR_EXPRESSION;
import static io.legaldocml.akn.AknElements.FRBR_ITEM;
import static io.legaldocml.akn.AknElements.FRBR_MANIFESTATION;
import static io.legaldocml.akn.AknElements.FRBR_WORK;
import static io.legaldocml.akn.AknElements.IDENTIFICATION;
import static io.legaldocml.akn.element.Attributes.attributeGetterSetter4AgentRef;
import static io.legaldocml.akn.util.XmlWriterHelper.writeSource;
import static io.legaldocml.unsafe.UnsafeHelper.getFieldOffset;

/**
 *  *   
 * 	   
 * 	     
 * 		   
 * 		   
 * 		   
 * 		   
 * 		 
 * 	   
 *     
 *   
 * 
 *
 * @author Jacques Militello
 */
public final class Identification implements AknObject, Source {


    private static final long ADDRESS_IDENTIFICATION = Buffers.address(IDENTIFICATION);

    private static final ImmutableMap> ATTRIBUTES;

    static {
        ATTRIBUTES = ImmutableMap.>builder()
                .put(SOURCE, attributeGetterSetter4AgentRef(SOURCE, getFieldOffset(Identification.class, "source")))
                .build();
    }

    // Mandatory
    private final FRBRWork work = new FRBRWork();

    // Mandatory
    private final FRBRExpression expression = new FRBRExpression();

    // Mandatory
    private final FRBRManifestation manifestation = new FRBRManifestation();

    // Optional
    private FRBRItem item;

    // Mandatory
    private AgentRef source;

    public FRBRWork getFRBRWork() {
        return this.work;
    }

    public FRBRExpression getFRBRExpression() {
        return this.expression;
    }

    public FRBRManifestation getFRBRManifestation() {
        return this.manifestation;
    }

    public FRBRItem getFRBRItem() {
        return this.item;
    }

    public void setFRBRItem(FRBRItem fRBRItem) {
        this.item = fRBRItem;
    }


    /**
     * {@inheritDoc}
     */
    public AgentRef getSource() {
        return this.source;
    }

    /**
     * {@inheritDoc}
     */
    public void setSource(AgentRef source) {
        this.source = source;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String name() {
        return IDENTIFICATION;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void write(XmlWriter writer) throws IOException {
        writer.writeStart(ADDRESS_IDENTIFICATION, 14);
        writeSource(writer, this);
        this.work.write(writer);
        this.expression.write(writer);
        this.manifestation.write(writer);
        if (this.item != null) {
            this.item.write(writer);
        }
        writer.writeEnd(ADDRESS_IDENTIFICATION, 14);
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public void read(XmlReader reader) {

        Attributes.read(reader, this);

        reader.nextStartOrEndElement();

        if (reader.getQName().equalsLocalName(FRBR_WORK)) {
            this.work.read(reader);
        }

        if (reader.getQName().equalsLocalName(FRBR_EXPRESSION)) {
            this.expression.read(reader);
        }

        if (reader.getQName().equalsLocalName(FRBR_MANIFESTATION)) {
            this.manifestation.read(reader);
        }

        if (reader.getQName().equalsLocalName(FRBR_ITEM)) {
            this.item = new FRBRItem();
            this.item.read(reader);
        }

        if (reader.getQName().equalsLocalName(IDENTIFICATION)) {
            reader.nextStartOrEndElement();
        } else {
            throw new IllegalStateException();
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public ImmutableMap> attributes() {
        return ATTRIBUTES;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void accept(AknVisitor visitor) {
        if (visitor.visitEnter(this)) {
            this.work.accept(visitor);
            this.expression.accept(visitor);
            this.manifestation.accept(visitor);
            if (this.item != null) {
                this.item.accept(visitor);
            }
            visitor.visitLeave(this);
        }
    }

}