/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * Modified by
 * @author  Data Virtuality GmbH
 * @date    $Date$
 *
 */
// https://issues.redhat.com/browse/TEIID-5480
package org.teiid.core.types;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.ref.Reference;
import java.lang.ref.SoftReference;
import java.lang.ref.WeakReference;
import java.sql.Blob;

/**
 * Base type for geography and geometry.
 *
 * Simply a blob reference with an srid.
 */
public abstract class AbstractGeospatialType extends BlobType {

	private int srid;
	private Reference<?> geoCache;

	public AbstractGeospatialType() {

	}

	public AbstractGeospatialType(Blob blob) {
		super(blob);
	}

	public AbstractGeospatialType(byte[] bytes) {
		super(bytes);
	}

	public int getSrid() {
		return srid;
	}

	public void setSrid(int srid) {
		this.srid = srid;
	}

	@Override
	public void writeExternal(ObjectOutput out) throws IOException {
		super.writeExternal(out);
		out.writeInt(srid);
	}

	@Override
	public void readExternal(ObjectInput in) throws IOException,
			ClassNotFoundException {
		super.readExternal(in);
		srid = in.readInt();
	}

	/**
	 * Get the Object model representation of the geospatial value
	 * @return
	 */
	public synchronized Object getGeoCache() {
		if (geoCache == null) {
			return null;
		}
		Object result = geoCache.get();
		if (result != null && geoCache instanceof WeakReference) {
			geoCache = new SoftReference(result);
		}
		return result;
	}

	/**
	 * Set the Object model representation of the geospatial value
	 * @return
	 */
	public synchronized void setGeoCache(Object objectReference) {
		if (objectReference == null) {
			this.geoCache = null;
		} else {
			this.geoCache = new WeakReference(objectReference);
		}
	}

	public synchronized void copyTo(AbstractGeospatialType geo) {
		geo.setGeoCache(geoCache==null?null:geoCache.get());
		geo.setSrid(srid);
		geo.setReference(this.reference);
	}

}
