/*
 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Nuxeo - initial API and implementation
 *
 * $Id$
 */

package org.eclipse.ecr.core.schema.types.primitives;

import org.eclipse.ecr.core.schema.types.PrimitiveType;

/**
 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
 */
public final class LongType extends PrimitiveType {

    public static final String ID = "long";

    public static final LongType INSTANCE = new LongType();

    private static final long serialVersionUID = 5638497847182758981L;


    private LongType() {
        super(ID);
    }

    @Override
    public boolean validate(Object object) {
        return object instanceof Number;
    }

    @Override
    public Object convert(Object value) {
        if (value instanceof Long) {
            return value;
        } else if (value instanceof Number) {
            return ((Number) value).longValue();
        } else {
            try {
                return Long.parseLong((String) value);
            } catch (NumberFormatException e) {
                return null;
            }
        }
    }

    @Override
    public Object decode(String str) {
        if (str == null) {
            return null;
        }
        try {
            return Long.parseLong(str);
        } catch (NumberFormatException e) {
            return 0L;
        }
    }

    @Override
    public String encode(Object object) {

        if (object instanceof Long) {
            return object.toString();
        } else if (object instanceof Number) {
            return object.toString();
        } else {
            return object != null ? (String) object : "";
        }
    }

    protected Object readResolve() {
        return INSTANCE;
    }

}