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Diffstat (limited to 'java/src/main/java/com/google/protobuf/LazyStringList.java')
| -rw-r--r-- | java/src/main/java/com/google/protobuf/LazyStringList.java | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/java/src/main/java/com/google/protobuf/LazyStringList.java b/java/src/main/java/com/google/protobuf/LazyStringList.java new file mode 100644 index 00000000..97139ca6 --- /dev/null +++ b/java/src/main/java/com/google/protobuf/LazyStringList.java @@ -0,0 +1,72 @@ +// 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.util.List; + +/** + * An interface extending List<String> that also provides access to the + * items of the list as UTF8-encoded ByteString objects. This is used by the + * protocol buffer implementation to support lazily converting bytes parsed + * over the wire to String objects until needed and also increases the + * efficiency of serialization if the String was never requested as the + * ByteString is already cached. + * <p> + * This only adds additional methods that are required for the use in the + * protocol buffer code in order to be able successfuly round trip byte arrays + * through parsing and serialization without conversion to strings. It's not + * attempting to support the functionality of say List<ByteString>, hence + * why only these two very specific methods are added. + * + * @author jonp@google.com (Jon Perlow) + */ +public interface LazyStringList extends List<String> { + + /** + * Returns the element at the specified position in this list as a ByteString. + * + * @param index index of the element to return + * @return the element at the specified position in this list + * @throws IndexOutOfBoundsException if the index is out of range + * (<tt>index < 0 || index >= size()</tt>) + */ + ByteString getByteString(int index); + + /** + * Appends the specified element to the end of this list (optional + * operation). + * + * @param element element to be appended to this list + * @throws UnsupportedOperationException if the <tt>add</tt> operation + * is not supported by this list + */ + void add(ByteString element); +} |