public static EntityManagerFactory createEntityManagerFactory()

in meecrowave-oauth2-minimal/src/main/java/org/apache/meecrowave/oauth2/configuration/JPAAdapter.java [39:90]
36 lines of code
3 McCabe index (conditional complexity)

    public static EntityManagerFactory createEntityManagerFactory(final OAuth2Options configuration) {
        return Persistence.createEntityManagerFactory("oauth2", new HashMap() {{
            put("openjpa.jdbc.SynchronizeMappings", "buildSchema(ForeignKeys=true)");
            put("openjpa.MetaDataFactory", "jpa(Types=" +
                    Client.class.getName() + ',' +
                    OAuthPermission.class.getName() + ',' +
                    UserSubject.class.getName() + ',' +
                    ServerAuthorizationCodeGrant.class.getName() + ',' +
                    BearerAccessToken.class.getName() + ',' +
                    RefreshToken.class.getName() + ")");

            // plain connection but not used cause of pooling
            /*
            put("openjpa.ConnectionDriverName", configuration.getJpaDriver());
            put("openjpa.ConnectionURL", configuration.getJpaDriver());
            put("openjpa.ConnectionUsername", configuration.getJpdaDatabaseUsername());
            put("openjpa.ConnectionPassword", configuration.getJpdaDatabasePassword());
            */
            /* cool...but what about pooling?
            put("javax.persistence.jdbc.driver", configuration.getJpaDriver());
            put("javax.persistence.jdbc.url", configuration.getJpaDatabaseUrl());
            put("javax.persistence.jdbc.user", configuration.getJpdaDatabaseUsername());
            put("javax.persistence.jdbc.password", configuration.getJpdaDatabasePassword());
            */
            // pooling support
            put("openjpa.ConnectionDriverName", System.getProperty(
                    "meecrowave.oauth2.datasourcetype", "org.apache.commons.dbcp2.BasicDataSource"));
            put("openjpa.ConnectionProperties",
                    "DriverClassName=" + configuration.getJpaDriver() + ',' +
                            "Url=" + configuration.getJpaDatabaseUrl() + ',' +
                            "Username=" + configuration.getJpdaDatabaseUsername() + ',' +
                            "Password=" + configuration.getJpdaDatabasePassword() + ',' +
                            "MaxActive=" + configuration.getJpaMaxActive() + ',' +
                            "MaxWaitMillis=" + configuration.getJpaMaxWait() + ',' +
                            "MaxIdle=" + configuration.getJpaMaxIdle() + ',' +
                            "TestOnBorrow=" + configuration.isJpaTestOnBorrow() + ',' +
                            "TestOnReturn=" + configuration.isJpaTestOnReturn() + ',' +
                            "TestWhileIdle=" + (configuration.getJpaValidationQuery() != null && !configuration.getJpaValidationQuery().isEmpty()) + ',' +
                            ofNullable(configuration.getJpaValidationQuery()).map(v -> "ValidationQuery=" + v + ',').orElse("") +
                            ofNullable(configuration.getJpaValidationInterval()).filter(it -> it > 0).map(v -> "MinEvictableIdleTimeMillis=" + v).orElse(""));

            ofNullable(configuration.getJpaProperties())
                    .map(p -> new Properties() {{
                        try {
                            load(new StringReader(p));
                        } catch (final IOException e) {
                            throw new IllegalArgumentException(e);
                        }
                    }})
                    .ifPresent(this::putAll);
        }});
    }