src/main/java/net/hydromatic/optiq/impl/csv/CsvSchemaFactory.java

/*
// Licensed to Julian Hyde under one or more contributor license
// agreements. See the NOTICE file distributed with this work for
// additional information regarding copyright ownership.
//
// Julian Hyde licenses this file to you 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:
//
// http://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 net.hydromatic.optiq.impl.csv;

import net.hydromatic.optiq.*;

import java.io.File;
import java.util.Map;

/**
 * Factory that creates a {@link CsvSchema}.
 *
 * <p>Allows a custom schema to be included in a model.json file.</p>
 */
@SuppressWarnings("UnusedDeclaration")
public class CsvSchemaFactory implements SchemaFactory {
  // public constructor, per factory contract
  public CsvSchemaFactory() {
  }

  public Schema create(MutableSchema parentSchema, String name,
      Map<String, Object> operand) {
    Map map = (Map) operand;
    String directory = (String) map.get("directory");
    Boolean smart = (Boolean) map.get("smart");
    final CsvSchema schema =
        new CsvSchema(
            parentSchema,
            name,
            new File(directory),
            parentSchema.getSubSchemaExpression(name, CsvSchema.class),
            smart != null && smart);
    parentSchema.addSchema(name, schema);
    return schema;
  }
}

// End CsvSchemaFactory.java