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/*
 * Copyright (c) 2008-2017 akquinet tech@spree GmbH
 *
 * This file is part of Hibersap.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this software 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.
 */

package org.hibersap.execution.jco;

import java.util.List;
import java.util.Properties;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibersap.HibersapException;
import org.hibersap.configuration.xml.Property;
import org.hibersap.configuration.xml.SessionManagerConfig;
import org.hibersap.execution.Connection;
import org.hibersap.session.Context;

/*
 * Uses the SAP Java Connector to connect to SAP.
 * 
 * @author Carsten Erker
 */
public class JCoContext implements Context {

    private static final Log LOG = LogFactory.getLog(JCoContext.class);

    private static final String JCO_PROPERTIES_PREFIX = "jco.";

    private String destinationName;

    /*
     * {@inheritDoc}
     */
    public void configure(final SessionManagerConfig config) {
        LOG.trace("configure JCo context");

        final Properties jcoProperties = new Properties();
        List properties = config.getProperties();

        for (Property property : properties) {
            String name = property.getName();
            if (name.startsWith(JCO_PROPERTIES_PREFIX)) {
                jcoProperties.put(name, property.getValue());
            }
        }

        destinationName = config.getName();
        if (StringUtils.isEmpty(destinationName)) {
            throw new HibersapException("A session manager name must be specified in Hibersap configuration");
        }

        JCoEnvironment.registerDestination(destinationName, jcoProperties);
    }

    /*
     * {@inheritDoc}
     */
    public void close() {
        JCoEnvironment.unregisterDestination(destinationName);
        destinationName = null;
    }

    /*
     * {@inheritDoc}
     */
    public Connection getConnection() {
        return new JCoConnection(destinationName);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((destinationName == null) ? 0 : destinationName.hashCode());
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        JCoContext other = (JCoContext) obj;
        if (destinationName == null) {
            if (other.destinationName != null) {
                return false;
            }
        } else if (!destinationName.equals(other.destinationName)) {
            return false;
        }
        return true;
    }
}