Update //third_party/protobuf to version 3.

third_party/protobuf/java/src/main/java/com/google/protobuf/MessageLite.java

Index: third_party/protobuf/java/src/main/java/com/google/protobuf/MessageLite.java
diff --git a/third_party/protobuf/java/src/main/java/com/google/protobuf/MessageLite.java b/third_party/protobuf/java/src/main/java/com/google/protobuf/MessageLite.java
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// 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.
+
+// TODO(kenton):  Use generics?  E.g. Builder<BuilderType extends Builder>, then
+//   mergeFrom*() could return BuilderType for better type-safety.
+
+package com.google.protobuf;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * Abstract interface implemented by Protocol Message objects.
+ *
+ * <p>This interface is implemented by all protocol message objects.  Non-lite
+ * messages additionally implement the Message interface, which is a subclass
+ * of MessageLite.  Use MessageLite instead when you only need the subset of
+ * features which it supports -- namely, nothing that uses descriptors or
+ * reflection.  You can instruct the protocol compiler to generate classes
+ * which implement only MessageLite, not the full Message interface, by adding
+ * the follow line to the .proto file:
+ * <pre>
+ *   option optimize_for = LITE_RUNTIME;
+ * </pre>
+ *
+ * <p>This is particularly useful on resource-constrained systems where the
+ * full protocol buffers runtime library is too big.
+ *
+ * <p>Note that on non-constrained systems (e.g. servers) when you need to link
+ * in lots of protocol definitions, a better way to reduce total code footprint
+ * is to use {@code optimize_for = CODE_SIZE}.  This will make the generated
+ * code smaller while still supporting all the same features (at the expense of
+ * speed).  {@code optimize_for = LITE_RUNTIME} is best when you only have a
+ * small number of message types linked into your binary, in which case the
+ * size of the protocol buffers runtime itself is the biggest problem.
+ *
+ * @author kenton@google.com Kenton Varda
+ */
+public interface MessageLite extends MessageLiteOrBuilder {
+
+
+  /**
+   * Serializes the message and writes it to {@code output}.  This does not
+   * flush or close the stream.
+   */
+  void writeTo(CodedOutputStream output) throws IOException;
+
+  /**
+   * Get the number of bytes required to encode this message.  The result
+   * is only computed on the first call and memoized after that.
+   */
+  int getSerializedSize();
+
+
+  /**
+   * Gets the parser for a message of the same type as this message.
+   */
+  Parser<? extends MessageLite> getParserForType();
+
+  // -----------------------------------------------------------------
+  // Convenience methods.
+
+  /**
+   * Serializes the message to a {@code ByteString} and returns it. This is
+   * just a trivial wrapper around
+   * {@link #writeTo(CodedOutputStream)}.
+   */
+  ByteString toByteString();
+
+  /**
+   * Serializes the message to a {@code byte} array and returns it.  This is
+   * just a trivial wrapper around
+   * {@link #writeTo(CodedOutputStream)}.
+   */
+  byte[] toByteArray();
+
+  /**
+   * Serializes the message and writes it to {@code output}.  This is just a
+   * trivial wrapper around {@link #writeTo(CodedOutputStream)}.  This does
+   * not flush or close the stream.
+   * <p>
+   * NOTE:  Protocol Buffers are not self-delimiting.  Therefore, if you write
+   * any more data to the stream after the message, you must somehow ensure
+   * that the parser on the receiving end does not interpret this as being
+   * part of the protocol message.  This can be done e.g. by writing the size
+   * of the message before the data, then making sure to limit the input to
+   * that size on the receiving end (e.g. by wrapping the InputStream in one
+   * which limits the input).  Alternatively, just use
+   * {@link #writeDelimitedTo(OutputStream)}.
+   */
+  void writeTo(OutputStream output) throws IOException;
+
+  /**
+   * Like {@link #writeTo(OutputStream)}, but writes the size of the message
+   * as a varint before writing the data.  This allows more data to be written
+   * to the stream after the message without the need to delimit the message
+   * data yourself.  Use {@link Builder#mergeDelimitedFrom(InputStream)} (or
+   * the static method {@code YourMessageType.parseDelimitedFrom(InputStream)})
+   * to parse messages written by this method.
+   */
+  void writeDelimitedTo(OutputStream output) throws IOException;
+
+
+  // =================================================================
+  // Builders
+
+  /**
+   * Constructs a new builder for a message of the same type as this message.
+   */
+  Builder newBuilderForType();
+
+  /**
+   * Constructs a builder initialized with the current message.  Use this to
+   * derive a new message from the current one.
+   */
+  Builder toBuilder();
+
+  /**
+   * Abstract interface implemented by Protocol Message builders.
+   */
+  interface Builder extends MessageLiteOrBuilder, Cloneable {
+    /** Resets all fields to their default values. */
+    Builder clear();
+
+    /**
+     * Constructs the message based on the state of the Builder. Subsequent
+     * changes to the Builder will not affect the returned message.
+     * @throws UninitializedMessageException The message is missing one or more
+     *         required fields (i.e. {@link #isInitialized()} returns false).
+     *         Use {@link #buildPartial()} to bypass this check.
+     */
+    MessageLite build();
+
+    /**
+     * Like {@link #build()}, but does not throw an exception if the message
+     * is missing required fields.  Instead, a partial message is returned.
+     * Subsequent changes to the Builder will not affect the returned message.
+     */
+    MessageLite buildPartial();
+
+    /**
+     * Clones the Builder.
+     * @see Object#clone()
+     */
+    Builder clone();
+
+    /**
+     * Parses a message of this type from the input and merges it with this
+     * message.
+     *
+     * <p>Warning:  This does not verify that all required fields are present in
+     * the input message.  If you call {@link #build()} without setting all
+     * required fields, it will throw an {@link UninitializedMessageException},
+     * which is a {@code RuntimeException} and thus might not be caught.  There
+     * are a few good ways to deal with this:
+     * <ul>
+     *   <li>Call {@link #isInitialized()} to verify that all required fields
+     *       are set before building.
+     *   <li>Use {@code buildPartial()} to build, which ignores missing
+     *       required fields.
+     * </ul>
+     *
+     * <p>Note:  The caller should call
+     * {@link CodedInputStream#checkLastTagWas(int)} after calling this to
+     * verify that the last tag seen was the appropriate end-group tag,
+     * or zero for EOF.
+     */
+    Builder mergeFrom(CodedInputStream input) throws IOException;
+
+    /**
+     * Like {@link Builder#mergeFrom(CodedInputStream)}, but also
+     * parses extensions.  The extensions that you want to be able to parse
+     * must be registered in {@code extensionRegistry}.  Extensions not in
+     * the registry will be treated as unknown fields.
+     */
+    Builder mergeFrom(CodedInputStream input,
+                      ExtensionRegistryLite extensionRegistry)
+                      throws IOException;
+
+    // ---------------------------------------------------------------
+    // Convenience methods.
+
+    /**
+     * Parse {@code data} as a message of this type and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(ByteString data) throws InvalidProtocolBufferException;
+
+    /**
+     * Parse {@code data} as a message of this type and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream,ExtensionRegistryLite)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(ByteString data,
+                      ExtensionRegistryLite extensionRegistry)
+                      throws InvalidProtocolBufferException;
+
+    /**
+     * Parse {@code data} as a message of this type and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(byte[] data) throws InvalidProtocolBufferException;
+
+    /**
+     * Parse {@code data} as a message of this type and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(byte[] data, int off, int len)
+                      throws InvalidProtocolBufferException;
+
+    /**
+     * Parse {@code data} as a message of this type and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream,ExtensionRegistryLite)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(byte[] data,
+                      ExtensionRegistryLite extensionRegistry)
+                      throws InvalidProtocolBufferException;
+
+    /**
+     * Parse {@code data} as a message of this type and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream,ExtensionRegistryLite)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(byte[] data, int off, int len,
+                      ExtensionRegistryLite extensionRegistry)
+                      throws InvalidProtocolBufferException;
+
+    /**
+     * Parse a message of this type from {@code input} and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream)}.  Note that this method always
+     * reads the <i>entire</i> input (unless it throws an exception).  If you
+     * want it to stop earlier, you will need to wrap your input in some
+     * wrapper stream that limits reading.  Or, use
+     * {@link MessageLite#writeDelimitedTo(OutputStream)} to write your message
+     * and {@link #mergeDelimitedFrom(InputStream)} to read it.
+     * <p>
+     * Despite usually reading the entire input, this does not close the stream.
+     *
+     * @return this
+     */
+    Builder mergeFrom(InputStream input) throws IOException;
+
+    /**
+     * Parse a message of this type from {@code input} and merge it with the
+     * message being built.  This is just a small wrapper around
+     * {@link #mergeFrom(CodedInputStream,ExtensionRegistryLite)}.
+     *
+     * @return this
+     */
+    Builder mergeFrom(InputStream input,
+                      ExtensionRegistryLite extensionRegistry)
+                      throws IOException;
+
+    /**
+     * Like {@link #mergeFrom(InputStream)}, but does not read until EOF.
+     * Instead, the size of the message (encoded as a varint) is read first,
+     * then the message data.  Use
+     * {@link MessageLite#writeDelimitedTo(OutputStream)} to write messages in
+     * this format.
+     *
+     * @return True if successful, or false if the stream is at EOF when the
+     *         method starts.  Any other error (including reaching EOF during
+     *         parsing) will cause an exception to be thrown.
+     */
+    boolean mergeDelimitedFrom(InputStream input)
+                               throws IOException;
+
+    /**
+     * Like {@link #mergeDelimitedFrom(InputStream)} but supporting extensions.
+     */
+    boolean mergeDelimitedFrom(InputStream input,
+                               ExtensionRegistryLite extensionRegistry)
+                               throws IOException;
+  }
+}