/*
 * Copyright (c) 2013 Cisco Systems, Inc. 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
 */

package org.opendaylight.controller.netconf.confignetconfconnector.mapping.attributes;

import org.opendaylight.controller.config.yangjmxgenerator.attribute.AttributeIfc;
import org.opendaylight.controller.config.yangjmxgenerator.attribute.DependencyAttribute;
import org.opendaylight.controller.config.yangjmxgenerator.attribute.JavaAttribute;
import org.opendaylight.controller.config.yangjmxgenerator.attribute.ListAttribute;
import org.opendaylight.controller.config.yangjmxgenerator.attribute.TOAttribute;

import javax.management.openmbean.ArrayType;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;

public abstract class AttributeIfcSwitchStatement<T> {

    protected AttributeIfc lastAttribute;

    public T switchAttribute(AttributeIfc attributeIfc) {

        this.lastAttribute = attributeIfc;

        if (attributeIfc instanceof JavaAttribute) {
            try {
                return caseJavaAttribute(attributeIfc.getOpenType());
            } catch (UnknownOpenTypeException e) {
                throw getIllegalArgumentException(attributeIfc);
            }

        } else if (attributeIfc instanceof DependencyAttribute) {
            return caseDependencyAttribute(((DependencyAttribute) attributeIfc).getOpenType());
        } else if (attributeIfc instanceof ListAttribute) {
            return caseListAttribute(((ListAttribute) attributeIfc).getOpenType());
        } else if (attributeIfc instanceof TOAttribute) {
            return caseTOAttribute(((TOAttribute) attributeIfc).getOpenType());
        }

        throw getIllegalArgumentException(attributeIfc);
    }

    private IllegalArgumentException getIllegalArgumentException(AttributeIfc attributeIfc) {
        return new IllegalArgumentException("Unknown attribute type " + attributeIfc.getClass() + ", " + attributeIfc
                + " with open type:" + attributeIfc.getOpenType());
    }

    public final T caseJavaAttribute(OpenType<?> openType) {
        if (openType instanceof SimpleType<?>) {
            return caseJavaSimpleAttribute((SimpleType<?>) openType);
        } else if (openType instanceof ArrayType<?>) {
            return caseJavaArrayAttribute((ArrayType<?>) openType);
        } else if (openType instanceof CompositeType) {
            return caseJavaCompositeAttribute((CompositeType) openType);
        }

        throw new UnknownOpenTypeException("Unknown attribute open type " + openType);
    }

    protected abstract T caseJavaSimpleAttribute(SimpleType<?> openType);

    protected abstract T caseJavaArrayAttribute(ArrayType<?> openType);

    protected abstract T caseJavaCompositeAttribute(CompositeType openType);

    protected abstract T caseDependencyAttribute(SimpleType<?> attributeIfc);

    protected abstract T caseTOAttribute(CompositeType openType);

    protected abstract T caseListAttribute(ArrayType<?> openType);


    private static class UnknownOpenTypeException extends RuntimeException {
        public UnknownOpenTypeException(String message) {
            super(message);
        }
    }
}