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-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/DumpCacheManager.java124
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpExecutor.java41
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java33
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java36
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java31
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java40
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java27
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java34
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java35
-rw-r--r--v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java33
10 files changed, 434 insertions, 0 deletions
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/DumpCacheManager.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/DumpCacheManager.java
new file mode 100644
index 000000000..9486ce171
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/DumpCacheManager.java
@@ -0,0 +1,124 @@
+/*
+ * 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.v3po.util.cache;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.ModificationCache;
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.check.DumpCheckFailedException;
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.noop.NoopDumpPostProcessingFunction;
+import javax.annotation.Nonnull;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Manager responsible for returning Data object dumps<br> either from cache or by invoking specified {@link
+ * EntityDumpExecutor}
+ */
+public final class DumpCacheManager<T extends JVppReplyDump, U> {
+
+ private static final Logger LOG = LoggerFactory.getLogger(DumpCacheManager.class);
+
+ private final EntityDumpExecutor<T, U> dumpExecutor;
+ private final EntityDumpNonEmptyCheck<T> dumpNonEmptyCheck;
+ private final EntityDumpPostProcessingFunction<T> postProcessor;
+
+ private DumpCacheManager(DumpCacheManagerBuilder builder) {
+ this.dumpExecutor = builder.dumpExecutor;
+ this.dumpNonEmptyCheck = builder.dumpNonEmptyCheck;
+ this.postProcessor = builder.postProcessingFunction;
+ }
+
+ /**
+ * Returns {@link Optional<T>} of dump
+ */
+ public Optional<T> getDump(@Nonnull String entityKey, @Nonnull ModificationCache cache)
+ throws DumpExecutionFailedException {
+
+ //this key binding to every log has its logic ,because every customizer have its own cache manager and if
+ //there is need for debugging/fixing some complex call with a lot of data,you can get lost in those logs
+ LOG.debug("Loading dump for KEY[{}]", entityKey);
+
+ T dump = (T) cache.get(entityKey);
+
+ if (dump == null) {
+ LOG.debug("Dump for KEY[{}] not present in cache,invoking dump executor", entityKey);
+
+ dump = dumpExecutor.executeDump();
+
+ //this is not a critical exception, so its only logged here
+ try {
+ dumpNonEmptyCheck.assertNotEmpty(dump);
+ } catch (DumpCheckFailedException e) {
+ LOG.warn("Dump for KEY[{}] has been resolved as empty", entityKey, e);
+ return Optional.absent();
+ }
+
+ //no need to check if post processor active,if wasnt set,default no-op will be used
+ LOG.debug("Post-processing dump for KEY[{}]", entityKey);
+ dump = postProcessor.apply(dump);
+
+ LOG.debug("Caching dump for KEY[{}]", entityKey);
+ cache.put(entityKey, dump);
+ return Optional.of(dump);
+ } else {
+ return Optional.of(dump);
+ }
+ }
+
+ public static final class DumpCacheManagerBuilder<T extends JVppReplyDump, U> {
+
+ private EntityDumpExecutor<T, U> dumpExecutor;
+ private EntityDumpNonEmptyCheck<T> dumpNonEmptyCheck;
+ private EntityDumpPostProcessingFunction<T> postProcessingFunction;
+
+ public DumpCacheManagerBuilder() {
+ //for cases when user does not set specific post-processor
+ postProcessingFunction = new NoopDumpPostProcessingFunction<T>();
+ }
+
+ public DumpCacheManagerBuilder<T, U> withExecutor(@Nonnull EntityDumpExecutor<T, U> executor) {
+ this.dumpExecutor = executor;
+ return this;
+ }
+
+ public DumpCacheManagerBuilder<T, U> withNonEmptyPredicate(@Nonnull EntityDumpNonEmptyCheck<T> check) {
+ this.dumpNonEmptyCheck = check;
+ return this;
+ }
+
+ public DumpCacheManagerBuilder<T, U> withPostProcessingFunction(
+ EntityDumpPostProcessingFunction postProcessingFunction) {
+ this.postProcessingFunction = postProcessingFunction;
+ return this;
+ }
+
+ public DumpCacheManager<T, U> build() {
+ checkNotNull(dumpExecutor, "Dump executor cannot be null");
+ checkNotNull(dumpNonEmptyCheck, "Dump verifier cannot be null");
+ checkNotNull(postProcessingFunction,
+ "Dump post-processor cannot be null cannot be null, default implementation is used if its not set");
+
+ return new DumpCacheManager<T, U>(this);
+ }
+ }
+}
+
+
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpExecutor.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpExecutor.java
new file mode 100644
index 000000000..82b30cf26
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpExecutor.java
@@ -0,0 +1,41 @@
+/*
+ * 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.v3po.util.cache;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+
+/**
+ * Generic interface for classes that return dumps for Data objects
+ */
+public interface EntityDumpExecutor<T extends JVppReplyDump, U> {
+
+ /**
+ * Performs dump on {link T} entity
+ *
+ * @return dump of specified {@link T} entity
+ * @throws DumpExecutionFailedException when dump fails
+ */
+ public T executeDump() throws DumpExecutionFailedException;
+
+ /**
+ * Bind dumping params for executor
+ */
+ default public void bindDumpParams(U params) {
+ throw new UnsupportedOperationException("You should override this method if you need to bind dumping params");
+ }
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java
new file mode 100644
index 000000000..6fb404a7a
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpNonEmptyCheck.java
@@ -0,0 +1,33 @@
+/*
+ * 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.v3po.util.cache;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.check.DumpCheckFailedException;
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.check.i.DumpEmptyException;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+
+/**
+ * Generic interface for classes that verifies if dump of data object is non-empty
+ */
+public interface EntityDumpNonEmptyCheck<T extends JVppReplyDump> {
+
+ /**
+ * Verifies if data are non-empty,if not throws {@link DumpEmptyException}
+ * @throws DumpEmptyException
+ */
+ public void assertNotEmpty(T data) throws DumpCheckFailedException;
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java
new file mode 100644
index 000000000..3d0040ea6
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/EntityDumpPostProcessingFunction.java
@@ -0,0 +1,36 @@
+/*
+ * 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.v3po.util.cache;
+
+import java.util.function.Function;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+
+/**
+ * Generic interface for class that are post-processing data dumped from vpp
+ */
+@FunctionalInterface
+public interface EntityDumpPostProcessingFunction<T extends JVppReplyDump> extends Function<T, T> {
+
+
+ /**
+ * Performs postprocessing on dumped data
+ *
+ * @return Post-processed data
+ */
+ @Override
+ T apply(T t);
+} \ No newline at end of file
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java
new file mode 100644
index 000000000..f3f8f7fef
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/DumpCheckFailedException.java
@@ -0,0 +1,31 @@
+/*
+ * 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.v3po.util.cache.exceptions.check;
+
+/**
+ * Abstract parent of exceptions thrown while checking if dump is not empty
+ */
+public abstract class DumpCheckFailedException extends Exception {
+
+ public DumpCheckFailedException(String message) {
+ super(message);
+ }
+
+ public DumpCheckFailedException(String message, Exception cause) {
+ super(message, cause);
+ }
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java
new file mode 100644
index 000000000..a5a228823
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/check/i/DumpEmptyException.java
@@ -0,0 +1,40 @@
+/*
+ * 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.v3po.util.cache.exceptions.check.i;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.EntityDumpNonEmptyCheck;
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.check.DumpCheckFailedException;
+
+/**
+ * This exception occurs when dump is resolved as empty by {@link EntityDumpNonEmptyCheck}
+ */
+public class DumpEmptyException extends DumpCheckFailedException {
+
+ /**
+ * Creates {@link DumpEmptyException} with specified reason
+ */
+ public DumpEmptyException(String reason) {
+ super(reason);
+ }
+
+ /**
+ * Creates {@link DumpEmptyException} with specified reason and sub-exception
+ */
+ public DumpEmptyException(String reason, Exception e) {
+ super(reason, e);
+ }
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java
new file mode 100644
index 000000000..5f4939cfb
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/DumpExecutionFailedException.java
@@ -0,0 +1,27 @@
+/*
+ * 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.v3po.util.cache.exceptions.execution;
+
+/**
+ * Default parent for all exceptions connected to dumping of VPP data
+ */
+public abstract class DumpExecutionFailedException extends Exception {
+
+ public DumpExecutionFailedException(String message, Exception cause) {
+ super(message, cause);
+ }
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java
new file mode 100644
index 000000000..9b92409f5
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpCallFailedException.java
@@ -0,0 +1,34 @@
+/*
+ * 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.v3po.util.cache.exceptions.execution.i;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import org.openvpp.jvpp.VppBaseCallException;
+
+/**
+ * Wrapper exception for {@link org.openvpp.jvpp.VppBaseCallException} during dumping
+ */
+public class DumpCallFailedException extends DumpExecutionFailedException {
+
+ public DumpCallFailedException(String message, VppBaseCallException cause) {
+ super(message, cause);
+ }
+
+ public static final DumpCallFailedException wrapFailedCallException(String message, VppBaseCallException cause) {
+ return new DumpCallFailedException(message, cause);
+ }
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java
new file mode 100644
index 000000000..afb278c9d
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/exceptions/execution/i/DumpTimeoutException.java
@@ -0,0 +1,35 @@
+/*
+ * 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.v3po.util.cache.exceptions.execution.i;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.exceptions.execution.DumpExecutionFailedException;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Exception thrown when dump call ends in timeout
+ */
+public class DumpTimeoutException extends DumpExecutionFailedException {
+
+ public DumpTimeoutException(String message, TimeoutException cause) {
+ super(message, cause);
+
+ }
+
+ public static final DumpTimeoutException wrapTimeoutException(String message, TimeoutException cause) {
+ return new DumpTimeoutException(message, cause);
+ }
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java
new file mode 100644
index 000000000..5efe439ab
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/cache/noop/NoopDumpPostProcessingFunction.java
@@ -0,0 +1,33 @@
+/*
+ * 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.v3po.util.cache.noop;
+
+import io.fd.honeycomb.v3po.translate.v3po.util.cache.EntityDumpPostProcessingFunction;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class NoopDumpPostProcessingFunction<T extends JVppReplyDump> implements EntityDumpPostProcessingFunction<T> {
+
+ private static final Logger LOG = LoggerFactory.getLogger(NoopDumpPostProcessingFunction.class);
+
+ @Override
+ public T apply(final T t) {
+ LOG.debug("Default post processing function called for {}", t);
+ return t;
+ }
+}