org.obiba.onyx.spring.identifier.RandomIncrementIdentifierSequenceProviderFactoryBean.java Source code

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Here is the source code for org.obiba.onyx.spring.identifier.RandomIncrementIdentifierSequenceProviderFactoryBean.java

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/*******************************************************************************
 * Copyright 2008(c) The OBiBa Consortium. All rights reserved.
 * 
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.obiba.onyx.spring.identifier;

import org.obiba.core.service.PersistenceManager;
import org.obiba.onyx.core.identifier.IdentifierSequenceProvider;
import org.obiba.onyx.core.identifier.NullIdentifierSequenceProvider;
import org.obiba.onyx.core.identifier.impl.randomincrement.RandomIncrementIdentifierSequenceProvider;
import org.obiba.onyx.core.service.ApplicationConfigurationService;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.Assert;

/**
 * Factory bean for creating a {@link RandomIncrementIdentifierSequenceProvider}.
 * 
 * If <code>useSequence</code> is <code>false</code>, creates a {@link NullIdentifierSequenceProvider} instead.
 */
public class RandomIncrementIdentifierSequenceProviderFactoryBean implements FactoryBean {
    //
    // Instance Variables
    //

    private IdentifierSequenceProvider sequenceProvider;

    private boolean useSequence;

    private int maxIncrement;

    @Autowired
    private PersistenceManager persistenceManager;

    @Autowired
    private ApplicationConfigurationService applicationConfigurationService;

    //
    // FactoryBean Methods
    //

    @SuppressWarnings("unchecked")
    public Class getObjectType() {
        return IdentifierSequenceProvider.class;
    }

    public boolean isSingleton() {
        return true;
    }

    public Object getObject() throws Exception {
        if (sequenceProvider == null) {
            sequenceProvider = createSequenceProvider();
        }

        return sequenceProvider;
    }

    //
    // Methods
    //

    public void setUseSequence(boolean useSequence) {
        this.useSequence = useSequence;
    }

    public void setMaxIncrement(int maxIncrement) {
        this.maxIncrement = maxIncrement;
    }

    public void validateArgs() throws IllegalArgumentException {
        Assert.isTrue(maxIncrement >= 1, "maxIncrement must be at least 1");
    }

    private IdentifierSequenceProvider createSequenceProvider() {
        if (useSequence) {
            RandomIncrementIdentifierSequenceProvider sequenceProvider = new RandomIncrementIdentifierSequenceProvider(
                    maxIncrement);
            sequenceProvider.setPersistenceManager(persistenceManager);
            sequenceProvider.setApplicationConfigurationService(applicationConfigurationService);
            return sequenceProvider;
        } else {
            return new NullIdentifierSequenceProvider();
        }
    }
}