SchemaGenerationProcessorFactory.java

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package org.glassfish.persistence.jpa.schemageneration;

import com.sun.enterprise.deployment.PersistenceUnitDescriptor;
import org.glassfish.persistence.jpa.PersistenceUnitInfoImpl;


/**
 * Factory for creating SchemaGenerationProcessor
 * @author  Mitesh Meswani
 */
public class SchemaGenerationProcessorFactory {

    /**
     * @return EclipseLink specific schema generation iff provider is EclipseLink or Toplink, and user has not specified
     * any standard JPA schema generation property else return JPAStandardSchemaGenerationProcessor
     */
    public static SchemaGenerationProcessor createSchemaGenerationProcessor(PersistenceUnitDescriptor pud) {
        // We use

        String providerClassName = PersistenceUnitInfoImpl.getPersistenceProviderClassNameForPuDesc(pud);

        boolean useJPA21Processor = true;

        if(EclipseLinkSchemaGenerationProcessor.isSupportedPersistenceProvider(providerClassName) ) {
           if(!containsStandardSchemaGenerationProperty(pud)) {
               useJPA21Processor = false;
           }
        }

        return useJPA21Processor ? new JPAStandardSchemaGenerationProcessor() : new EclipseLinkSchemaGenerationProcessor(providerClassName);
    }

    private static final String STANDARD_SCHEMA_GENERATION_PREFIX = "javax.persistence.schema-generation";

    /**
     * @return true if the given <code>pud</code> contains a JPA standard property for schema generation
     */
    private static boolean containsStandardSchemaGenerationProperty(PersistenceUnitDescriptor pud) {
        boolean containsStandardSchemaGenerationProperty = false;
        for (Object puPropertyName : pud.getProperties().keySet()) {
            if(puPropertyName instanceof String && String.class.cast(puPropertyName).startsWith(STANDARD_SCHEMA_GENERATION_PREFIX) ) {
                containsStandardSchemaGenerationProperty = true;
                break;
            }
        }
        return containsStandardSchemaGenerationProperty;
    }

}