/*
 * ToroDB
 * Copyright © 2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.torodb.backend.converters.array;

import com.torodb.kvdocument.values.KvArray;
import com.torodb.kvdocument.values.KvValue;
import com.torodb.kvdocument.values.heap.ListKvArray;

import java.util.ArrayList;
import java.util.List;

import javax.json.JsonArray;
import javax.json.JsonValue;

/**
 *
 */
public abstract class BaseArrayToArrayConverter implements ArrayConverter<JsonArray, KvArray> {

  private static final long serialVersionUID = 1L;

  private final ValueToArrayConverterProvider valueToArrayConverterProvider;

  public BaseArrayToArrayConverter(ValueToArrayConverterProvider valueToArrayConverterProvider) {
    super();
    this.valueToArrayConverterProvider = valueToArrayConverterProvider;
  }

  @SuppressWarnings({"unchecked", "rawtypes"})
  @Override
  public String toJsonLiteral(KvArray value) {
    StringBuilder sb = new StringBuilder(value.size() * 20);
    sb.append("[");
    for (KvValue<?> child : value) {
      sb.append(((ArrayConverter) valueToArrayConverterProvider.getConverter(child.getType()))
          .toJsonLiteral(child));
      sb.append(",");
    }
    if (!value.isEmpty()) {
      sb.delete(sb.length() - 1, sb.length());
    }
    sb.append("]");
    return sb.toString();
  }

  @SuppressWarnings({"rawtypes", "unchecked"})
  @Override
  public KvArray fromJsonValue(JsonArray value) {
    List<KvValue<?>> list = new ArrayList<>(value.size());
    for (JsonValue child : value) {
      ArrayConverter converter = valueToArrayConverterProvider.fromJsonValue(child);
      list.add(converter.fromJsonValue(child));
    }
    return new ListKvArray(list);
  }
}