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Removing dependency on apache-commons lang 3, adding necessary classe…
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171 changes: 171 additions & 0 deletions
171
hoodie-common/src/main/java/com/uber/hoodie/common/util/SerializationUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| /* | ||
| * Copyright (c) 2018 Uber Technologies, Inc. ([email protected]) | ||
| * | ||
| * 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.uber.hoodie.common.util; | ||
|
|
||
| import com.uber.hoodie.exception.HoodieSerializationException; | ||
| import java.io.ByteArrayInputStream; | ||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.ObjectInputStream; | ||
| import java.io.ObjectOutputStream; | ||
| import java.io.OutputStream; | ||
| import java.io.Serializable; | ||
|
|
||
| /** | ||
| * (NOTE: Adapted from Apache commons-lang3) | ||
| * This class defines API's to serde an object. | ||
| */ | ||
| public class SerializationUtils { | ||
| // Serialize | ||
| //----------------------------------------------------------------------- | ||
|
|
||
| /** | ||
| * <p>Serializes an {@code Object} to the specified stream.</p> | ||
| * | ||
| * <p>The stream will be closed once the object is written. | ||
| * This avoids the need for a finally clause, and maybe also exception | ||
| * handling, in the application code.</p> | ||
| * | ||
| * <p>The stream passed in is not buffered internally within this method. | ||
| * This is the responsibility of your application if desired.</p> | ||
| * | ||
| * @param obj the object to serialize to bytes, may be null | ||
| * @param outputStream the stream to write to, must not be null | ||
| * @throws IllegalArgumentException if {@code outputStream} is {@code null} | ||
| * @throws HoodieSerializationException (runtime) if the serialization fails | ||
| */ | ||
| public static void serialize(final Serializable obj, final OutputStream outputStream) { | ||
| if (outputStream == null) { | ||
| throw new IllegalArgumentException("The OutputStream must not be null"); | ||
| } | ||
| ObjectOutputStream out = null; | ||
| try { | ||
| // stream closed in the finally | ||
| out = new ObjectOutputStream(outputStream); | ||
| out.writeObject(obj); | ||
|
|
||
| } catch (final IOException ex) { | ||
| throw new HoodieSerializationException("unable to serialize object", ex); | ||
| } finally { | ||
| try { | ||
| if (out != null) { | ||
| out.close(); | ||
| } | ||
| } catch (final IOException ex) { // NOPMD | ||
| // ignore close exception | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * <p>Serializes an {@code Object} to a byte array for | ||
| * storage/serialization.</p> | ||
| * | ||
| * @param obj the object to serialize to bytes | ||
| * @return a byte[] with the converted Serializable | ||
| * @throws HoodieSerializationException (runtime) if the serialization fails | ||
| */ | ||
| public static byte[] serialize(final Serializable obj) { | ||
| final ByteArrayOutputStream baos = new ByteArrayOutputStream(512); | ||
| serialize(obj, baos); | ||
| return baos.toByteArray(); | ||
| } | ||
|
|
||
| // Deserialize | ||
| //----------------------------------------------------------------------- | ||
|
|
||
| /** | ||
| * <p> | ||
| * Deserializes an {@code Object} from the specified stream. | ||
| * </p> | ||
| * | ||
| * <p> | ||
| * The stream will be closed once the object is written. This avoids the need for a finally clause, and maybe also | ||
| * exception handling, in the application code. | ||
| * </p> | ||
| * | ||
| * <p> | ||
| * The stream passed in is not buffered internally within this method. This is the responsibility of your | ||
| * application if desired. | ||
| * </p> | ||
| * | ||
| * <p> | ||
| * If the call site incorrectly types the return value, a {@link ClassCastException} is thrown from the call site. | ||
| * Without Generics in this declaration, the call site must type cast and can cause the same ClassCastException. | ||
| * Note that in both cases, the ClassCastException is in the call site, not in this method. | ||
| * </p> | ||
| * | ||
| * @param <T> the object type to be deserialized | ||
| * @param inputStream the serialized object input stream, must not be null | ||
| * @return the deserialized object | ||
| * @throws IllegalArgumentException if {@code inputStream} is {@code null} | ||
| * @throws HoodieSerializationException (runtime) if the serialization fails | ||
| */ | ||
| public static <T> T deserialize(final InputStream inputStream) { | ||
| if (inputStream == null) { | ||
| throw new IllegalArgumentException("The InputStream must not be null"); | ||
| } | ||
| ObjectInputStream in = null; | ||
| try { | ||
| // stream closed in the finally | ||
| in = new ObjectInputStream(inputStream); | ||
| @SuppressWarnings("unchecked") // may fail with CCE if serialised form is incorrect | ||
| final T obj = (T) in.readObject(); | ||
| return obj; | ||
|
|
||
| } catch (final ClassCastException ex) { | ||
| throw new HoodieSerializationException("cannot cast class", ex); | ||
| } catch (final ClassNotFoundException ex) { | ||
| throw new HoodieSerializationException("class not found", ex); | ||
| } catch (final IOException ex) { | ||
| throw new HoodieSerializationException("unable to deserialize to object", ex); | ||
| } finally { | ||
| try { | ||
| if (in != null) { | ||
| in.close(); | ||
| } | ||
| } catch (final IOException ex) { // NOPMD | ||
| // ignore close exception | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * <p> | ||
| * Deserializes a single {@code Object} from an array of bytes. | ||
| * </p> | ||
| * | ||
| * <p> | ||
| * If the call site incorrectly types the return value, a {@link ClassCastException} is thrown from the call site. | ||
| * Without Generics in this declaration, the call site must type cast and can cause the same ClassCastException. | ||
| * Note that in both cases, the ClassCastException is in the call site, not in this method. | ||
| * </p> | ||
| * | ||
| * @param <T> the object type to be deserialized | ||
| * @param objectData the serialized object, must not be null | ||
| * @return the deserialized object | ||
| * @throws IllegalArgumentException if {@code objectData} is {@code null} | ||
| * @throws HoodieSerializationException (runtime) if the serialization fails | ||
| */ | ||
| public static <T> T deserialize(final byte[] objectData) { | ||
| if (objectData == null) { | ||
| throw new IllegalArgumentException("The byte[] must not be null"); | ||
| } | ||
| return deserialize(new ByteArrayInputStream(objectData)); | ||
| } | ||
| } |
51 changes: 51 additions & 0 deletions
51
hoodie-common/src/main/java/com/uber/hoodie/common/util/StringUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * Copyright (c) 2018 Uber Technologies, Inc. ([email protected]) | ||
| * | ||
| * 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.uber.hoodie.common.util; | ||
|
|
||
| /** | ||
| * Simple utility for operations on strings | ||
| */ | ||
| public class StringUtils { | ||
|
|
||
| /** | ||
| * <p>Joins the elements of the provided array into a single String | ||
| * containing the provided list of elements.</p> | ||
| * | ||
| * <p>No separator is added to the joined String. | ||
| * Null objects or empty strings within the array are represented by | ||
| * empty strings.</p> | ||
| * | ||
| * <pre> | ||
| * StringUtils.join(null) = null | ||
| * StringUtils.join([]) = "" | ||
| * StringUtils.join([null]) = "" | ||
| * StringUtils.join(["a", "b", "c"]) = "abc" | ||
| * StringUtils.join([null, "", "a"]) = "a" | ||
| * </pre> | ||
| */ | ||
| public static <T> String join(final String... elements) { | ||
| return join(elements, ""); | ||
| } | ||
|
|
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| public static String join(final String[] array, final String separator) { | ||
| if (array == null) { | ||
| return null; | ||
| } | ||
| return org.apache.hadoop.util.StringUtils.join(separator, array); | ||
| } | ||
|
|
||
| } |
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