HONEYCOMB-122 Update reader registry to share similar APIs as writer

+ Extract common registry builder base code
(Reader registry is not flat, so there is not full control over ordering as with writers
but it is sufficient)
+ Split CompositeReader into CompositeReader, SubtreeReader and GenericReader
+ No need to build composite structure in ReaderFactories (registry does that internally)
+ Keep only ReaderCustomizer + ListReaderCustomizer, no root reader (same for writers)

Change-Id: Ic4e5bc96ad47a6cbcada4efcc2209db5c16d2a6c
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/v3po/translate-spi/src/main/java/io/fd/honeycomb/v3po/translate/spi/write/WriterCustomizer.java b/v3po/translate-spi/src/main/java/io/fd/honeycomb/v3po/translate/spi/write/WriterCustomizer.java
new file mode 100644
index 000000000..06ce3f814
--- /dev/null
+++ b/v3po/translate-spi/src/main/java/io/fd/honeycomb/v3po/translate/spi/write/WriterCustomizer.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.spi.write;
+
+import com.google.common.annotations.Beta;
+import io.fd.honeycomb.v3po.translate.write.WriteContext;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * CompositeChildWriter SPI to customize its behavior.
+ *
+ * @param <D> Specific DataObject derived type (Identifiable), that is handled by this customizer
+ */
+@Beta
+public interface WriterCustomizer<D extends DataObject> {
+
+    /**
+     * Handle write operation. C from CRUD.
+     *
+     * @param id Identifier(from root) of data being written
+     * @param dataAfter New data to be written
+     * @param writeContext Write context can be used to store any useful information and then utilized by other customizers
+     *
+     * @throws WriteFailedException if write was unsuccessful
+     */
+    void writeCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
+                                @Nonnull final D dataAfter,
+                                @Nonnull final WriteContext writeContext) throws WriteFailedException;
+
+    /**
+     * Handle update operation. U from CRUD.
+     *
+     * @param id Identifier(from root) of data being written
+     * @param dataBefore Old data
+     * @param dataAfter New, updated data
+     * @param writeContext Write context can be used to store any useful information and then utilized by other customizers
+     *
+     * @throws WriteFailedException if update was unsuccessful
+     */
+    void updateCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
+                                 @Nonnull final D dataBefore,
+                                 @Nonnull final D dataAfter,
+                                 @Nonnull final WriteContext writeContext) throws WriteFailedException;
+
+    /**
+     * Handle delete operation. D from CRUD.
+     *
+     * @param id Identifier(from root) of data being written
+     * @param dataBefore Old data being deleted
+     * @param writeContext Write context can be used to store any useful information and then utilized by other customizers
+     *
+     * @throws WriteFailedException if delete was unsuccessful
+     */
+    void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
+                                 @Nonnull final D dataBefore,
+                                 @Nonnull final WriteContext writeContext) throws WriteFailedException;
+
+}