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Unified Diff: third_party/protobuf/java/src/main/java/com/google/protobuf/LazyField.java

Issue 556933002: Remove protobuf lite for java. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase before submit Created 6 years, 3 months ago
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Index: third_party/protobuf/java/src/main/java/com/google/protobuf/LazyField.java
diff --git a/third_party/protobuf/java/src/main/java/com/google/protobuf/LazyField.java b/third_party/protobuf/java/src/main/java/com/google/protobuf/LazyField.java
deleted file mode 100644
index c4f9201cdc2a6d0a4de5112c9a72accc78f24d4e..0000000000000000000000000000000000000000
--- a/third_party/protobuf/java/src/main/java/com/google/protobuf/LazyField.java
+++ /dev/null
@@ -1,210 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc. All rights reserved.
-// http://code.google.com/p/protobuf/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-package com.google.protobuf;
-
-import java.io.IOException;
-import java.util.Iterator;
-import java.util.Map.Entry;
-
-/**
- * LazyField encapsulates the logic of lazily parsing message fields. It stores
- * the message in a ByteString initially and then parse it on-demand.
- *
- * LazyField is thread-compatible e.g. concurrent read are safe, however,
- * synchronizations are needed under read/write situations.
- *
- * Now LazyField is only used to lazily load MessageSet.
- * TODO(xiangl): Use LazyField to lazily load all messages.
- *
- * @author xiangl@google.com (Xiang Li)
- */
-class LazyField {
-
- final private MessageLite defaultInstance;
- final private ExtensionRegistryLite extensionRegistry;
-
- // Mutable because it is initialized lazily.
- private ByteString bytes;
- private volatile MessageLite value;
- private volatile boolean isDirty = false;
-
- public LazyField(MessageLite defaultInstance,
- ExtensionRegistryLite extensionRegistry, ByteString bytes) {
- this.defaultInstance = defaultInstance;
- this.extensionRegistry = extensionRegistry;
- this.bytes = bytes;
- }
-
- public MessageLite getValue() {
- ensureInitialized();
- return value;
- }
-
- /**
- * LazyField is not thread-safe for write access. Synchronizations are needed
- * under read/write situations.
- */
- public MessageLite setValue(MessageLite value) {
- MessageLite originalValue = this.value;
- this.value = value;
- bytes = null;
- isDirty = true;
- return originalValue;
- }
-
- /**
- * Due to the optional field can be duplicated at the end of serialized
- * bytes, which will make the serialized size changed after LazyField
- * parsed. Be careful when using this method.
- */
- public int getSerializedSize() {
- if (isDirty) {
- return value.getSerializedSize();
- }
- return bytes.size();
- }
-
- public ByteString toByteString() {
- if (!isDirty) {
- return bytes;
- }
- synchronized (this) {
- if (!isDirty) {
- return bytes;
- }
- bytes = value.toByteString();
- isDirty = false;
- return bytes;
- }
- }
-
- @Override
- public int hashCode() {
- ensureInitialized();
- return value.hashCode();
- }
-
- @Override
- public boolean equals(Object obj) {
- ensureInitialized();
- return value.equals(obj);
- }
-
- @Override
- public String toString() {
- ensureInitialized();
- return value.toString();
- }
-
- private void ensureInitialized() {
- if (value != null) {
- return;
- }
- synchronized (this) {
- if (value != null) {
- return;
- }
- try {
- if (bytes != null) {
- value = defaultInstance.getParserForType()
- .parseFrom(bytes, extensionRegistry);
- }
- } catch (IOException e) {
- // TODO(xiangl): Refactory the API to support the exception thrown from
- // lazily load messages.
- }
- }
- }
-
- // ====================================================
-
- /**
- * LazyEntry and LazyIterator are used to encapsulate the LazyField, when
- * users iterate all fields from FieldSet.
- */
- static class LazyEntry<K> implements Entry<K, Object> {
- private Entry<K, LazyField> entry;
-
- private LazyEntry(Entry<K, LazyField> entry) {
- this.entry = entry;
- }
-
- public K getKey() {
- return entry.getKey();
- }
-
- public Object getValue() {
- LazyField field = entry.getValue();
- if (field == null) {
- return null;
- }
- return field.getValue();
- }
-
- public LazyField getField() {
- return entry.getValue();
- }
-
- public Object setValue(Object value) {
- if (!(value instanceof MessageLite)) {
- throw new IllegalArgumentException(
- "LazyField now only used for MessageSet, "
- + "and the value of MessageSet must be an instance of MessageLite");
- }
- return entry.getValue().setValue((MessageLite) value);
- }
- }
-
- static class LazyIterator<K> implements Iterator<Entry<K, Object>> {
- private Iterator<Entry<K, Object>> iterator;
-
- public LazyIterator(Iterator<Entry<K, Object>> iterator) {
- this.iterator = iterator;
- }
-
- public boolean hasNext() {
- return iterator.hasNext();
- }
-
- @SuppressWarnings("unchecked")
- public Entry<K, Object> next() {
- Entry<K, ?> entry = iterator.next();
- if (entry.getValue() instanceof LazyField) {
- return new LazyEntry<K>((Entry<K, LazyField>) entry);
- }
- return (Entry<K, Object>) entry;
- }
-
- public void remove() {
- iterator.remove();
- }
- }
-}

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