Application: gvSIG desktop

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package org.gvsig.fmap.dal.feature.impl.featurereference;

import java.lang.ref.WeakReference;

import java.util.Base64;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.FeatureType;

import org.gvsig.fmap.dal.feature.impl.DefaultFeatureStore;

import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices;

import org.gvsig.tools.persistence.Persistent;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.json.JSONArray;

/**

 *

 * @author fdiaz

 */

public class FeatureReferenceOID implements FeatureReferenceProviderServices, Persistent {

    private Object oid;

    private WeakReference storeRef;

    private String featureTypeId;

    /*friend*/

    FeatureReferenceOID(FeatureStore store, Object oid) {

        this.oid = oid;

            this.storeRef = new WeakReference(store);

        this.featureTypeId = store.getDefaultFeatureTypeQuietly().getId();

    }

    @Override

    public Object getOID() {

        return  this.oid;

    }

    @Override

    public String[] getKeyNames() {

        return null;

    }

    @Override

    public Object getKeyValue(String name) {

        return null;

    }

    @Override

    public String getFeatureTypeId() {

        return featureTypeId;

    }

    @Override

    public Feature getFeature() throws DataException {

        return this.getStore().getFeatureByReference(this);

    }

    @Override

    public Feature getFeatureQuietly() {

        try {

            return this.getFeature();

        } catch (Exception e) {

            return null;

        }

    }

    @Override

    public Feature getFeature(FeatureType featureType) throws DataException {

        return this.getStore().getFeatureByReference(this, featureType);

    }

    private DefaultFeatureStore getStore() {

        return (DefaultFeatureStore) this.storeRef.get();

    }

    @Override

    public boolean isNewFeature() {

        return false;

    }

    @Override

    public String getCode() {

        Object[] data = new Object[7];

        data[0] = "oid";

        data[1] = this.oid;

        String s = new JSONArray(data).toString();

        String r = Base64.getEncoder().encodeToString(s.getBytes());

        return r;

    }

    @Override

    public void saveToState(PersistentState state) throws PersistenceException {

        state.set("oid", oid);

        state.set("store", (Persistent) storeRef.get());

        state.set("featureTypeId", featureTypeId);

    }

    @Override

    public void loadFromState(PersistentState state)

            throws PersistenceException {

        this.oid = state.get("oid");

        this.storeRef = new WeakReference(state.get("store"));

        this.featureTypeId = state.getString("featureTypeId");

    }

}