content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF 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 org.apache.apex.malhar.contrib.parser;
  
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  
  /**
   * <p>
   * This is schema that defines fields and their constraints for delimited and fixedWidth files
   * The operators use this information to validate the incoming tuples.
   * Information from JSON schema is saved in this object and is used by the
   * operators
   *
   * @since 3.7.0
   */
  public class Schema
  {
    /**
     * JSON key string for fields array
     */
    public static final String FIELDS = "fields";
    /**
     * JSON key string for name of the field within fields array
     */
    public static final String NAME = "name";
    /**
     * JSON key string for type of the field within fields array
     */
    public static final String TYPE = "type";
    /**
     * JSON key string for date format constraint
     */
    public static final String DATE_FORMAT = "format";
    /**
     * JSON key string for true value constraint
     */
    public static final String TRUE_VALUE = "trueValue";
    /**
     * JSON key string for false value constraint
     */
    public static final String FALSE_VALUE = "falseValue";
    /**
     * JSON key string for default true value of boolean
     */
    public static final String DEFAULT_TRUE_VALUE = "true";
    /**
     * JSON key string for default true value of boolean
     */
    public static final String DEFAULT_FALSE_VALUE = "false";
    /**
     * Default date format
     */
    public static final String DEFAULT_DATE_FORMAT = "dd/mm/yy";
    /**
     * This holds the list of field names in the same order as in the schema
     */
    protected List<String> fieldNames = new LinkedList<String>();
  
  
    /**
     * Get the list of field names mentioned in schema
     *
     * @return fieldNames
     */
    public List<String> getFieldNames()
    {
      return Collections.unmodifiableList(fieldNames);
    }
  
    /**
     * Supported data types
     */
    public enum FieldType
    {
      BOOLEAN, DOUBLE, INTEGER, FLOAT, LONG, SHORT, CHARACTER, STRING, DATE
    }
  
    /**
     * Objects of this class represents a particular field in the schema. Each
     * field has a name, type and a set of associated constraints.
     *
     */
    public class Field
    {
      /**
       * name of the field
       */
      String name;
      /**
       * Data type of the field
       */
      FieldType type;
  
      /**
       * Parameterized Constructor
       * @param name name of the field.
       * @param type data type of the field.
       */
      public Field(String name, String type)
      {
        this.name = name;
        this.type = FieldType.valueOf(type.toUpperCase());
      }
  
      /**
       * Default Constructor
       */
      public Field()
      {
      }
  
      /**
       * Get the name of the field
       *
       * @return name
       */
      public String getName()
      {
        return name;
      }
  
      /**
       * Set the name of the field
       *
       * @param name
       */
      public void setName(String name)
      {
        this.name = name;
      }
  
      /**
       * Get {@link FieldType}
       *
       * @return type
       */
      public FieldType getType()
      {
        return type;
      }
  
      /**
       * Set {@link FieldType}
       *
       * @param type
       */
      public void setType(FieldType type)
      {
        this.type = type;
      }
  
      @Override
      public String toString()
      {
        return "Fields [name=" + name + ", type=" + type + "]";
      }
  
    }
  }
  