public static BasicDataSource createDataSource()

in java/org/apache/tomcat/dbcp/dbcp2/BasicDataSourceFactory.java [300:573]
222 lines of code
56 McCabe index (conditional complexity)

    public static BasicDataSource createDataSource(final Properties properties) throws Exception {
        final BasicDataSource dataSource = new BasicDataSource();
        String value = null;

        value = properties.getProperty(PROP_DEFAULT_AUTO_COMMIT);
        if (value != null) {
            dataSource.setDefaultAutoCommit(Boolean.valueOf(value));
        }

        value = properties.getProperty(PROP_DEFAULT_READ_ONLY);
        if (value != null) {
            dataSource.setDefaultReadOnly(Boolean.valueOf(value));
        }

        value = properties.getProperty(PROP_DEFAULT_TRANSACTION_ISOLATION);
        if (value != null) {
            int level = PoolableConnectionFactory.UNKNOWN_TRANSACTION_ISOLATION;
            if ("NONE".equalsIgnoreCase(value)) {
                level = Connection.TRANSACTION_NONE;
            } else if ("READ_COMMITTED".equalsIgnoreCase(value)) {
                level = Connection.TRANSACTION_READ_COMMITTED;
            } else if ("READ_UNCOMMITTED".equalsIgnoreCase(value)) {
                level = Connection.TRANSACTION_READ_UNCOMMITTED;
            } else if ("REPEATABLE_READ".equalsIgnoreCase(value)) {
                level = Connection.TRANSACTION_REPEATABLE_READ;
            } else if ("SERIALIZABLE".equalsIgnoreCase(value)) {
                level = Connection.TRANSACTION_SERIALIZABLE;
            } else {
                try {
                    level = Integer.parseInt(value);
                } catch (final NumberFormatException e) {
                    System.err.println("Could not parse defaultTransactionIsolation: " + value);
                    System.err.println("WARNING: defaultTransactionIsolation not set");
                    System.err.println("using default value of database driver");
                    level = PoolableConnectionFactory.UNKNOWN_TRANSACTION_ISOLATION;
                }
            }
            dataSource.setDefaultTransactionIsolation(level);
        }

        value = properties.getProperty(PROP_DEFAULT_CATALOG);
        if (value != null) {
            dataSource.setDefaultCatalog(value);
        }

        value = properties.getProperty(PROP_DEFAULT_SCHEMA);
        if (value != null) {
            dataSource.setDefaultSchema(value);
        }

        value = properties.getProperty(PROP_CACHE_STATE);
        if (value != null) {
            dataSource.setCacheState(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_DRIVER_CLASS_NAME);
        if (value != null) {
            dataSource.setDriverClassName(value);
        }

        value = properties.getProperty(PROP_LIFO);
        if (value != null) {
            dataSource.setLifo(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_MAX_TOTAL);
        if (value != null) {
            dataSource.setMaxTotal(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_MAX_IDLE);
        if (value != null) {
            dataSource.setMaxIdle(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_MIN_IDLE);
        if (value != null) {
            dataSource.setMinIdle(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_INITIAL_SIZE);
        if (value != null) {
            dataSource.setInitialSize(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_MAX_WAIT_MILLIS);
        if (value != null) {
            dataSource.setMaxWaitMillis(Long.parseLong(value));
        }

        value = properties.getProperty(PROP_TEST_ON_CREATE);
        if (value != null) {
            dataSource.setTestOnCreate(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_TEST_ON_BORROW);
        if (value != null) {
            dataSource.setTestOnBorrow(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_TEST_ON_RETURN);
        if (value != null) {
            dataSource.setTestOnReturn(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_TIME_BETWEEN_EVICTION_RUNS_MILLIS);
        if (value != null) {
            dataSource.setTimeBetweenEvictionRunsMillis(Long.parseLong(value));
        }

        value = properties.getProperty(PROP_NUM_TESTS_PER_EVICTION_RUN);
        if (value != null) {
            dataSource.setNumTestsPerEvictionRun(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_MIN_EVICTABLE_IDLE_TIME_MILLIS);
        if (value != null) {
            dataSource.setMinEvictableIdleTimeMillis(Long.parseLong(value));
        }

        value = properties.getProperty(PROP_SOFT_MIN_EVICTABLE_IDLE_TIME_MILLIS);
        if (value != null) {
            dataSource.setSoftMinEvictableIdleTimeMillis(Long.parseLong(value));
        }

        value = properties.getProperty(PROP_EVICTION_POLICY_CLASS_NAME);
        if (value != null) {
            dataSource.setEvictionPolicyClassName(value);
        }

        value = properties.getProperty(PROP_TEST_WHILE_IDLE);
        if (value != null) {
            dataSource.setTestWhileIdle(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_PASSWORD);
        if (value != null) {
            dataSource.setPassword(value);
        }

        value = properties.getProperty(PROP_URL);
        if (value != null) {
            dataSource.setUrl(value);
        }

        value = properties.getProperty(PROP_USER_NAME);
        if (value != null) {
            dataSource.setUsername(value);
        }

        value = properties.getProperty(PROP_VALIDATION_QUERY);
        if (value != null) {
            dataSource.setValidationQuery(value);
        }

        value = properties.getProperty(PROP_VALIDATION_QUERY_TIMEOUT);
        if (value != null) {
            dataSource.setValidationQueryTimeout(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_ACCESS_TO_UNDERLYING_CONNECTION_ALLOWED);
        if (value != null) {
            dataSource.setAccessToUnderlyingConnectionAllowed(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_REMOVE_ABANDONED_ON_BORROW);
        if (value != null) {
            dataSource.setRemoveAbandonedOnBorrow(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_REMOVE_ABANDONED_ON_MAINTENANCE);
        if (value != null) {
            dataSource.setRemoveAbandonedOnMaintenance(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_REMOVE_ABANDONED_TIMEOUT);
        if (value != null) {
            dataSource.setRemoveAbandonedTimeout(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_LOG_ABANDONED);
        if (value != null) {
            dataSource.setLogAbandoned(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_ABANDONED_USAGE_TRACKING);
        if (value != null) {
            dataSource.setAbandonedUsageTracking(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_POOL_PREPARED_STATEMENTS);
        if (value != null) {
            dataSource.setPoolPreparedStatements(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_CLEAR_STATEMENT_POOL_ON_RETURN);
        if (value != null) {
            dataSource.setClearStatementPoolOnReturn(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_MAX_OPEN_PREPARED_STATEMENTS);
        if (value != null) {
            dataSource.setMaxOpenPreparedStatements(Integer.parseInt(value));
        }

        value = properties.getProperty(PROP_CONNECTION_INIT_SQLS);
        if (value != null) {
            dataSource.setConnectionInitSqls(parseList(value, ';'));
        }

        value = properties.getProperty(PROP_CONNECTION_PROPERTIES);
        if (value != null) {
            final Properties p = getProperties(value);
            final Enumeration<?> e = p.propertyNames();
            while (e.hasMoreElements()) {
                final String propertyName = (String) e.nextElement();
                dataSource.addConnectionProperty(propertyName, p.getProperty(propertyName));
            }
        }

        value = properties.getProperty(PROP_MAX_CONN_LIFETIME_MILLIS);
        if (value != null) {
            dataSource.setMaxConnLifetimeMillis(Long.parseLong(value));
        }

        value = properties.getProperty(PROP_LOG_EXPIRED_CONNECTIONS);
        if (value != null) {
            dataSource.setLogExpiredConnections(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_JMX_NAME);
        if (value != null) {
            dataSource.setJmxName(value);
        }

        value = properties.getProperty(PROP_ENABLE_AUTO_COMMIT_ON_RETURN);
        if (value != null) {
            dataSource.setAutoCommitOnReturn(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_ROLLBACK_ON_RETURN);
        if (value != null) {
            dataSource.setRollbackOnReturn(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_DEFAULT_QUERY_TIMEOUT);
        if (value != null) {
            dataSource.setDefaultQueryTimeout(Integer.valueOf(value));
        }

        value = properties.getProperty(PROP_FAST_FAIL_VALIDATION);
        if (value != null) {
            dataSource.setFastFailValidation(Boolean.valueOf(value).booleanValue());
        }

        value = properties.getProperty(PROP_DISCONNECTION_SQL_CODES);
        if (value != null) {
            dataSource.setDisconnectionSqlCodes(parseList(value, ','));
        }

        value = properties.getProperty(PROP_CONNECTION_FACTORY_CLASS_NAME);
        if (value != null) {
            dataSource.setConnectionFactoryClassName(value);
        }

        // DBCP-215
        // Trick to make sure that initialSize connections are created
        if (dataSource.getInitialSize() > 0) {
            dataSource.getLogWriter();
        }

        // Return the configured DataSource instance
        return dataSource;
    }