Move gson to its own folder

[unical.git] / gson / com / google / gson / internal / bind / ArrayTypeAdapter.java

diff --git a/gson/com/google/gson/internal/bind/ArrayTypeAdapter.java b/gson/com/google/gson/internal/bind/ArrayTypeAdapter.java
new file mode 100644 (file)
index 0000000..55d7e30
--- /dev/null
+++ b/gson/com/google/gson/internal/bind/ArrayTypeAdapter.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2011 Google Inc.
+ *
+ * Licensed 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 com.google.gson.internal.bind;
+
+import java.io.IOException;
+import java.lang.reflect.Array;
+import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.google.gson.Gson;
+import com.google.gson.TypeAdapter;
+import com.google.gson.TypeAdapterFactory;
+import com.google.gson.internal.$Gson$Types;
+import com.google.gson.reflect.TypeToken;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonToken;
+import com.google.gson.stream.JsonWriter;
+
+/**
+ * Adapt an array of objects.
+ */
+public final class ArrayTypeAdapter<E> extends TypeAdapter<Object> {
+  public static final TypeAdapterFactory FACTORY = new TypeAdapterFactory() {
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
+      Type type = typeToken.getType();
+      if (!(type instanceof GenericArrayType || type instanceof Class && ((Class<?>) type).isArray())) {
+        return null;
+      }
+
+      Type componentType = $Gson$Types.getArrayComponentType(type);
+      TypeAdapter<?> componentTypeAdapter = gson.getAdapter(TypeToken.get(componentType));
+      return new ArrayTypeAdapter(
+              gson, componentTypeAdapter, $Gson$Types.getRawType(componentType));
+    }
+  };
+
+  private final Class<E> componentType;
+  private final TypeAdapter<E> componentTypeAdapter;
+
+  public ArrayTypeAdapter(Gson context, TypeAdapter<E> componentTypeAdapter, Class<E> componentType) {
+    this.componentTypeAdapter =
+      new TypeAdapterRuntimeTypeWrapper<E>(context, componentTypeAdapter, componentType);
+    this.componentType = componentType;
+  }
+
+  public Object read(JsonReader in) throws IOException {
+    if (in.peek() == JsonToken.NULL) {
+      in.nextNull();
+      return null;
+    }
+
+    List<E> list = new ArrayList<E>();
+    in.beginArray();
+    while (in.hasNext()) {
+      E instance = componentTypeAdapter.read(in);
+      list.add(instance);
+    }
+    in.endArray();
+    Object array = Array.newInstance(componentType, list.size());
+    for (int i = 0; i < list.size(); i++) {
+      Array.set(array, i, list.get(i));
+    }
+    return array;
+  }
+
+  @SuppressWarnings("unchecked")
+  @Override public void write(JsonWriter out, Object array) throws IOException {
+    if (array == null) {
+      out.nullValue();
+      return;
+    }
+
+    out.beginArray();
+    for (int i = 0, length = Array.getLength(array); i < length; i++) {
+      E value = (E) Array.get(array, i);
+      componentTypeAdapter.write(out, value);
+    }
+    out.endArray();
+  }
+}