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-rw-r--r--infra/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/write/AbstractGenericWriter.java137
1 files changed, 137 insertions, 0 deletions
diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/write/AbstractGenericWriter.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/write/AbstractGenericWriter.java
new file mode 100644
index 000000000..44b36edae
--- /dev/null
+++ b/infra/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/write/AbstractGenericWriter.java
@@ -0,0 +1,137 @@
+/*
+ * 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.util.write;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import io.fd.honeycomb.v3po.translate.util.RWUtils;
+import io.fd.honeycomb.v3po.translate.write.WriteContext;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import io.fd.honeycomb.v3po.translate.write.Writer;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class AbstractGenericWriter<D extends DataObject> implements Writer<D> {
+
+ private static final Logger LOG = LoggerFactory.getLogger(AbstractGenericWriter.class);
+
+ private final InstanceIdentifier<D> instanceIdentifier;
+
+ protected AbstractGenericWriter(final InstanceIdentifier<D> type) {
+ this.instanceIdentifier = RWUtils.makeIidWildcarded(type);
+ }
+
+ protected void writeCurrent(final InstanceIdentifier<D> id, final D data, final WriteContext ctx)
+ throws WriteFailedException {
+ LOG.debug("{}: Writing current: {} data: {}", this, id, data);
+ writeCurrentAttributes(id, data, ctx);
+ LOG.debug("{}: Current node written successfully", this);
+ }
+
+ protected void updateCurrent(final InstanceIdentifier<D> id, final D dataBefore, final D dataAfter,
+ final WriteContext ctx) throws WriteFailedException {
+ LOG.debug("{}: Updating current: {} dataBefore: {}, datAfter: {}", this, id, dataBefore, dataAfter);
+
+ if (dataBefore.equals(dataAfter)) {
+ LOG.debug("{}: Skipping current(no update): {}", this, id);
+ // No change, ignore
+ return;
+ }
+ updateCurrentAttributes(id, dataBefore, dataAfter, ctx);
+ LOG.debug("{}: Current node updated successfully", this);
+ }
+
+ protected void deleteCurrent(final InstanceIdentifier<D> id, final D dataBefore, final WriteContext ctx)
+ throws WriteFailedException {
+ LOG.debug("{}: Deleting current: {} dataBefore: {}", this, id, dataBefore);
+ deleteCurrentAttributes(id, dataBefore, ctx);
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public void update(@Nonnull final InstanceIdentifier<? extends DataObject> id,
+ @Nullable final DataObject dataBefore,
+ @Nullable final DataObject dataAfter,
+ @Nonnull final WriteContext ctx) throws WriteFailedException {
+ LOG.debug("{}: Updating : {}", this, id);
+ LOG.trace("{}: Updating : {}, from: {} to: {}", this, id, dataBefore, dataAfter);
+
+ checkArgument(idPointsToCurrent(id), "Cannot handle data: %s. Only: %s can be handled by writer: %s",
+ id, getManagedDataObjectType(), this);
+
+ if (isWrite(dataBefore, dataAfter)) {
+ writeCurrent((InstanceIdentifier<D>) id, castToManaged(dataAfter), ctx);
+ } else if (isDelete(dataBefore, dataAfter)) {
+ deleteCurrent((InstanceIdentifier<D>) id, castToManaged(dataBefore), ctx);
+ } else {
+ checkArgument(dataBefore != null && dataAfter != null, "No data to process");
+ updateCurrent((InstanceIdentifier<D>) id, castToManaged(dataBefore), castToManaged(dataAfter), ctx);
+ }
+ }
+
+ private void checkDataType(@Nonnull final DataObject dataAfter) {
+ checkArgument(getManagedDataObjectType().getTargetType().isAssignableFrom(dataAfter.getClass()));
+ }
+
+ private D castToManaged(final DataObject data) {
+ checkDataType(data);
+ return getManagedDataObjectType().getTargetType().cast(data);
+ }
+
+ private static boolean isWrite(final DataObject dataBefore,
+ final DataObject dataAfter) {
+ return dataBefore == null && dataAfter != null;
+ }
+
+ private static boolean isDelete(final DataObject dataBefore,
+ final DataObject dataAfter) {
+ return dataAfter == null && dataBefore != null;
+ }
+
+ private boolean idPointsToCurrent(final @Nonnull InstanceIdentifier<? extends DataObject> id) {
+ return id.getTargetType().equals(getManagedDataObjectType().getTargetType());
+ }
+
+ protected abstract void writeCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
+ @Nonnull final D data,
+ @Nonnull final WriteContext ctx) throws WriteFailedException;
+
+ protected abstract void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
+ @Nonnull final D dataBefore,
+ @Nonnull final WriteContext ctx) throws WriteFailedException;
+
+ protected abstract void updateCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
+ @Nonnull final D dataBefore,
+ @Nonnull final D dataAfter,
+ @Nonnull final WriteContext ctx) throws WriteFailedException;
+
+ @Nonnull
+ @Override
+ public InstanceIdentifier<D> getManagedDataObjectType() {
+ return instanceIdentifier;
+ }
+
+
+ @Override
+ public String toString() {
+ return String.format("Writer[%s]", getManagedDataObjectType().getTargetType().getSimpleName());
+ }
+}