/*
    * 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.commons.imaging.common;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class GenericImageMetadata implements ImageMetadata {
  
      public static class GenericImageMetadataItem implements ImageMetadataItem {
  
          private final String keyword;
          private final String text;
  
          public GenericImageMetadataItem(final String keyword, final String text) {
              this.keyword = keyword;
              this.text = text;
          }
  
          public String getKeyword() {
              return keyword;
          }
  
          public String getText() {
              return text;
          }
  
          @Override
          public String toString() {
              return toString(null);
          }
  
          @Override
          public String toString(final String prefix) {
              final String result = keyword + ": " + text;
              if (null != prefix) {
                  return prefix + result;
              }
              return result;
          }
      }
  
      private static final String NEWLINE = System.lineSeparator();
  
      private final List<ImageMetadataItem> items = new ArrayList<>();
  
      public void add(final ImageMetadataItem item) {
          items.add(item);
      }
  
      public void add(final String keyword, final String text) {
          add(new GenericImageMetadataItem(keyword, text));
      }
  
      @Override
      public List<? extends ImageMetadataItem> getItems() {
          return new ArrayList<>(items);
      }
  
      @Override
      public String toString() {
          return toString(null);
      }
  
      @Override
      public String toString(String prefix) {
          if (null == prefix) {
              prefix = "";
          }
  
          final StringBuilder result = new StringBuilder();
          for (int i = 0; i < items.size(); i++) {
              if (i > 0) {
                  result.append(NEWLINE);
              }
              // if (null != prefix)
              // result.append(prefix);
  
              final ImageMetadataItem item = items.get(i);
              result.append(item.toString(prefix + "\t"));
  
              // Debug.debug("prefix", prefix);
              // Debug.debug("item", items.get(i));
              // Debug.debug();
          }
         return result.toString();
     }
 
 }