Work on typing

[lgpl/argeo-commons.git] / org.argeo.api / src / org / argeo / api / gcr / spi / AbstractContent.java

diff --git a/org.argeo.api/src/org/argeo/api/gcr/spi/AbstractContent.java b/org.argeo.api/src/org/argeo/api/gcr/spi/AbstractContent.java
index 2da186ef2538eb6d2d1f2da67be1d9dae6675d6a..2d3bcde93c9f23228e2f00c187f2802f903ee936 100644 (file)
--- a/org.argeo.api/src/org/argeo/api/gcr/spi/AbstractContent.java
+++ b/org.argeo.api/src/org/argeo/api/gcr/spi/AbstractContent.java
@@ -1,48 +1,164 @@
 package org.argeo.api.gcr.spi;
 
 import java.util.AbstractMap;
-import java.util.HashSet;
+import java.util.AbstractSet;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
 
+import javax.xml.namespace.QName;
+
 import org.argeo.api.gcr.Content;
+import org.argeo.api.gcr.CrName;
+
+public abstract class AbstractContent extends AbstractMap<QName, Object> implements Content {
+
+       /*
+        * ATTRIBUTES OPERATIONS
+        */
+       protected abstract Iterable<QName> keys();
+
+       protected abstract void removeAttr(QName key);
+
+       @Override
+       public Set<Entry<QName, Object>> entrySet() {
+               Set<Entry<QName, Object>> result = new AttrSet();
+               return result;
+       }
+
+       @Override
+       public Class<?> getType(QName key) {
+               return String.class;
+       }
+
+       @Override
+       public boolean isMultiple(QName key) {
+               return false;
+       }
+
+       @Override
+       public <A> Optional<List<A>> getMultiple(QName key, Class<A> clss) {
+               Object value = get(key);
+               if (value == null)
+                       return null;
+               if (value instanceof List) {
+                       try {
+                               List<A> res = (List<A>) value;
+                               return Optional.of(res);
+                       } catch (ClassCastException e) {
+                               List<A> res = new ArrayList<>();
+                               List<?> lst = (List<?>) value;
+                               try {
+                                       for (Object o : lst) {
+                                               A item = (A) o;
+                                               res.add(item);
+                                       }
+                                       return Optional.of(res);
+                               } catch (ClassCastException e1) {
+                                       return Optional.empty();
+                               }
+                       }
+               } else {// singleton
+                       try {
+                               A res = (A) value;
+                               return Optional.of(Collections.singletonList(res));
+                       } catch (ClassCastException e) {
+                               return Optional.empty();
+                       }
+               }
+       }
+
+       /*
+        * CONTENT OPERATIONS
+        */
+
+       @Override
+       public String getPath() {
+               List<Content> ancestors = new ArrayList<>();
+               collectAncestors(ancestors, this);
+               StringBuilder path = new StringBuilder();
+               for (Content c : ancestors) {
+                       QName name = c.getName();
+                       // FIXME
+                       if (!CrName.ROOT.get().equals(name))
+                               path.append('/').append(name);
+               }
+               return path.toString();
+       }
 
-public abstract class AbstractContent extends AbstractMap<String, Object> implements Content {
+       private void collectAncestors(List<Content> ancestors, Content content) {
+               if (content == null)
+                       return;
+               ancestors.add(0, content);
+               collectAncestors(ancestors, content.getParent());
+       }
+
+       /*
+        * UTILITIES
+        */
+       protected boolean isDefaultAttrTypeRequested(Class<?> clss) {
+               // check whether clss is Object.class
+               return clss.isAssignableFrom(Object.class);
+       }
 
        @Override
-       public Set<Entry<String, Object>> entrySet() {
-               Set<Entry<String, Object>> result = new HashSet<>();
-               for (String key : keys()) {
-                       Entry<String, Object> entry = new Entry<String, Object>() {
+       public String toString() {
+               return "content " + getPath();
+       }
+
+       /*
+        * SUB CLASSES
+        */
+
+       class AttrSet extends AbstractSet<Entry<QName, Object>> {
+
+               @Override
+               public Iterator<Entry<QName, Object>> iterator() {
+                       final Iterator<QName> keys = keys().iterator();
+                       Iterator<Entry<QName, Object>> it = new Iterator<Map.Entry<QName, Object>>() {
+
+                               QName key = null;
 
                                @Override
-                               public String getKey() {
-                                       return key;
+                               public boolean hasNext() {
+                                       return keys.hasNext();
                                }
 
                                @Override
-                               public Object getValue() {
+                               public Entry<QName, Object> next() {
+                                       key = keys.next();
                                        // TODO check type
-                                       return get(key, Object.class);
+                                       Optional<?> value = get(key, Object.class);
+                                       assert !value.isEmpty();
+                                       AbstractMap.SimpleEntry<QName, Object> entry = new SimpleEntry<>(key, value.get());
+                                       return entry;
                                }
 
                                @Override
-                               public Object setValue(Object value) {
-                                       throw new UnsupportedOperationException();
+                               public void remove() {
+                                       if (key != null) {
+                                               AbstractContent.this.removeAttr(key);
+                                       } else {
+                                               throw new IllegalStateException("Iteration has not started");
+                                       }
                                }
 
                        };
-                       result.add(entry);
+                       return it;
+               }
+
+               @Override
+               public int size() {
+                       int count = 0;
+                       for (QName key : keys()) {
+                               count++;
+                       }
+                       return count;
                }
-               return result;
-       }
 
-       protected abstract Iterable<String> keys();
-       
-       /*
-        * UTILITIES
-        */
-       protected boolean isDefaultAttrTypeRequested(Class<?> clss) {
-               // check whether clss is Object.class 
-               return clss.isAssignableFrom(Object.class);
        }
 }