org.springframework.jca.cci.connection.DelegatingConnectionFactory.java Source code

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Here is the source code for org.springframework.jca.cci.connection.DelegatingConnectionFactory.java

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/*
 * Copyright 2002-2017 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.jca.cci.connection;

import javax.naming.NamingException;
import javax.naming.Reference;
import javax.resource.ResourceException;
import javax.resource.cci.Connection;
import javax.resource.cci.ConnectionFactory;
import javax.resource.cci.ConnectionSpec;
import javax.resource.cci.RecordFactory;
import javax.resource.cci.ResourceAdapterMetaData;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

/**
 * CCI {@link ConnectionFactory} implementation that delegates all calls
 * to a given target {@link ConnectionFactory}.
 *
 * <p>This class is meant to be subclassed, with subclasses overriding only
 * those methods (such as {@link #getConnection()}) that should not simply
 * delegate to the target {@link ConnectionFactory}.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see #getConnection
 */
@SuppressWarnings("serial")
public class DelegatingConnectionFactory implements ConnectionFactory, InitializingBean {

    @Nullable
    private ConnectionFactory targetConnectionFactory;

    /**
     * Set the target ConnectionFactory that this ConnectionFactory should delegate to.
     */
    public void setTargetConnectionFactory(@Nullable ConnectionFactory targetConnectionFactory) {
        this.targetConnectionFactory = targetConnectionFactory;
    }

    /**
     * Return the target ConnectionFactory that this ConnectionFactory should delegate to.
     */
    @Nullable
    public ConnectionFactory getTargetConnectionFactory() {
        return this.targetConnectionFactory;
    }

    /**
     * Obtain the target {@code ConnectionFactory} for actual use (never {@code null}).
     * @since 5.0
     */
    protected ConnectionFactory obtainTargetConnectionFactory() {
        ConnectionFactory connectionFactory = getTargetConnectionFactory();
        Assert.state(connectionFactory != null, "No 'targetConnectionFactory' set");
        return connectionFactory;
    }

    @Override
    public void afterPropertiesSet() {
        if (getTargetConnectionFactory() == null) {
            throw new IllegalArgumentException("Property 'targetConnectionFactory' is required");
        }
    }

    @Override
    public Connection getConnection() throws ResourceException {
        return obtainTargetConnectionFactory().getConnection();
    }

    @Override
    public Connection getConnection(ConnectionSpec connectionSpec) throws ResourceException {
        return obtainTargetConnectionFactory().getConnection(connectionSpec);
    }

    @Override
    public RecordFactory getRecordFactory() throws ResourceException {
        return obtainTargetConnectionFactory().getRecordFactory();
    }

    @Override
    public ResourceAdapterMetaData getMetaData() throws ResourceException {
        return obtainTargetConnectionFactory().getMetaData();
    }

    @Override
    public Reference getReference() throws NamingException {
        return obtainTargetConnectionFactory().getReference();
    }

    @Override
    public void setReference(Reference reference) {
        obtainTargetConnectionFactory().setReference(reference);
    }

}