/*
    * 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.syncope.core.provisioning.api.serialization;
  
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.databind.JsonDeserializer;
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Base64;
  import java.util.List;
  import org.apache.commons.lang3.StringUtils;
  import org.identityconnectors.common.security.GuardedString;
  
  public abstract class AbstractValueDeserializer<T extends Object> extends JsonDeserializer<T> {
  
      protected List<Object> doDeserialize(final JsonNode value, final JsonParser jp) throws IOException {
          List<Object> values = new ArrayList<>();
  
          for (JsonNode node : value) {
              if (node.isNull()) {
                  values.add(null);
              } else if (node.isObject()) {
                  values.add(((ObjectNode) node).traverse(jp.getCodec()).readValueAs(GuardedString.class));
              } else if (node.isBoolean()) {
                  values.add(node.asBoolean());
              } else if (node.isDouble()) {
                  values.add(node.asDouble());
              } else if (node.isLong()) {
                  values.add(node.asLong());
              } else if (node.isInt()) {
                  values.add(node.asInt());
              } else {
                  String text = node.asText();
                  if (text.startsWith(AbstractValueSerializer.BYTE_ARRAY_PREFIX)
                          && text.endsWith(AbstractValueSerializer.BYTE_ARRAY_SUFFIX)) {
  
                      values.add(Base64.getDecoder().decode(StringUtils.substringBetween(
                              text,
                              AbstractValueSerializer.BYTE_ARRAY_PREFIX,
                              AbstractValueSerializer.BYTE_ARRAY_SUFFIX)));
                  } else {
                      values.add(text);
                  }
              }
          }
  
          return values;
      }
  }