org.argeo.api/src/org/argeo/api/gcr/spi/AbstractContent.java

   1 package org.argeo.api.gcr.spi;
   2
   3 import java.util.AbstractMap;
   4 import java.util.HashSet;
   5 import java.util.Set;
   6
   7 import org.argeo.api.gcr.Content;
   8
   9 public abstract class AbstractContent extends AbstractMap<String, Object> implements Content {
  10
  11         @Override
  12         public Set<Entry<String, Object>> entrySet() {
  13                 Set<Entry<String, Object>> result = new HashSet<>();
  14                 for (String key : keys()) {
  15                         Entry<String, Object> entry = new Entry<String, Object>() {
  16
  17                                 @Override
  18                                 public String getKey() {
  19                                         return key;
  20                                 }
  21
  22                                 @Override
  23                                 public Object getValue() {
  24                                         // TODO check type
  25                                         return get(key, Object.class);
  26                                 }
  27
  28                                 @Override
  29                                 public Object setValue(Object value) {
  30                                         throw new UnsupportedOperationException();
  31                                 }
  32
  33                         };
  34                         result.add(entry);
  35                 }
  36                 return result;
  37         }
  38
  39         protected abstract Iterable<String> keys();
  40
  41         /*
  42          * UTILITIES
  43          */
  44         protected boolean isDefaultAttrTypeRequested(Class<?> clss) {
  45                 // check whether clss is Object.class
  46                 return clss.isAssignableFrom(Object.class);
  47         }
  48 }