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Diffstat (limited to 'java/core/src/main/java/com/google/protobuf/ExtensionRegistryLite.java')
| -rw-r--r-- | java/core/src/main/java/com/google/protobuf/ExtensionRegistryLite.java | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/java/core/src/main/java/com/google/protobuf/ExtensionRegistryLite.java b/java/core/src/main/java/com/google/protobuf/ExtensionRegistryLite.java deleted file mode 100644 index 5e4d7739..00000000 --- a/java/core/src/main/java/com/google/protobuf/ExtensionRegistryLite.java +++ /dev/null @@ -1,226 +0,0 @@ -// 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. - -package com.google.protobuf; - -import java.util.Collections; -import java.util.HashMap; -import java.util.Map; - -/** - * Equivalent to {@link ExtensionRegistry} but supports only "lite" types. - * <p> - * If all of your types are lite types, then you only need to use - * {@code ExtensionRegistryLite}. Similarly, if all your types are regular - * types, then you only need {@link ExtensionRegistry}. Typically it does not - * make sense to mix the two, since if you have any regular types in your - * program, you then require the full runtime and lose all the benefits of - * the lite runtime, so you might as well make all your types be regular types. - * However, in some cases (e.g. when depending on multiple third-party libraries - * where one uses lite types and one uses regular), you may find yourself - * wanting to mix the two. In this case things get more complicated. - * <p> - * There are three factors to consider: Whether the type being extended is - * lite, whether the embedded type (in the case of a message-typed extension) - * is lite, and whether the extension itself is lite. Since all three are - * declared in different files, they could all be different. Here are all - * the combinations and which type of registry to use: - * <pre> - * Extended type Inner type Extension Use registry - * ======================================================================= - * lite lite lite ExtensionRegistryLite - * lite regular lite ExtensionRegistry - * regular regular regular ExtensionRegistry - * all other combinations not supported - * </pre> - * <p> - * Note that just as regular types are not allowed to contain lite-type fields, - * they are also not allowed to contain lite-type extensions. This is because - * regular types must be fully accessible via reflection, which in turn means - * that all the inner messages must also support reflection. On the other hand, - * since regular types implement the entire lite interface, there is no problem - * with embedding regular types inside lite types. - * - * @author kenton@google.com Kenton Varda - */ -public class ExtensionRegistryLite { - - // Set true to enable lazy parsing feature for MessageSet. - // - // TODO(xiangl): Now we use a global flag to control whether enable lazy - // parsing feature for MessageSet, which may be too crude for some - // applications. Need to support this feature on smaller granularity. - private static volatile boolean eagerlyParseMessageSets = false; - - // Visible for testing. - static final String EXTENSION_CLASS_NAME = "com.google.protobuf.Extension"; - - /* @Nullable */ - static Class<?> resolveExtensionClass() { - try { - return Class.forName(EXTENSION_CLASS_NAME); - } catch (ClassNotFoundException e) { - // See comment in ExtensionRegistryFactory on the potential expense of this. - return null; - } - } - - /* @Nullable */ - private static final Class<?> extensionClass = resolveExtensionClass(); - - public static boolean isEagerlyParseMessageSets() { - return eagerlyParseMessageSets; - } - - public static void setEagerlyParseMessageSets(boolean isEagerlyParse) { - eagerlyParseMessageSets = isEagerlyParse; - } - - /** - * Construct a new, empty instance. - * - * <p> - * This may be an {@code ExtensionRegistry} if the full (non-Lite) proto libraries are available. - */ - public static ExtensionRegistryLite newInstance() { - return ExtensionRegistryFactory.create(); - } - - /** - * Get the unmodifiable singleton empty instance of either ExtensionRegistryLite or - * {@code ExtensionRegistry} (if the full (non-Lite) proto libraries are available). - */ - public static ExtensionRegistryLite getEmptyRegistry() { - return ExtensionRegistryFactory.createEmpty(); - } - - /** Returns an unmodifiable view of the registry. */ - public ExtensionRegistryLite getUnmodifiable() { - return new ExtensionRegistryLite(this); - } - - /** - * Find an extension by containing type and field number. - * - * @return Information about the extension if found, or {@code null} - * otherwise. - */ - @SuppressWarnings("unchecked") - public <ContainingType extends MessageLite> - GeneratedMessageLite.GeneratedExtension<ContainingType, ?> - findLiteExtensionByNumber( - final ContainingType containingTypeDefaultInstance, - final int fieldNumber) { - return (GeneratedMessageLite.GeneratedExtension<ContainingType, ?>) - extensionsByNumber.get( - new ObjectIntPair(containingTypeDefaultInstance, fieldNumber)); - } - - /** Add an extension from a lite generated file to the registry. */ - public final void add( - final GeneratedMessageLite.GeneratedExtension<?, ?> extension) { - extensionsByNumber.put( - new ObjectIntPair(extension.getContainingTypeDefaultInstance(), - extension.getNumber()), - extension); - } - - /** - * Add an extension from a lite generated file to the registry only if it is - * a non-lite extension i.e. {@link GeneratedMessageLite.GeneratedExtension}. */ - public final void add(ExtensionLite<?, ?> extension) { - if (GeneratedMessageLite.GeneratedExtension.class.isAssignableFrom(extension.getClass())) { - add((GeneratedMessageLite.GeneratedExtension<?, ?>) extension); - } - if (ExtensionRegistryFactory.isFullRegistry(this)) { - try { - this.getClass().getMethod("add", extensionClass).invoke(this, extension); - } catch (Exception e) { - throw new IllegalArgumentException( - String.format("Could not invoke ExtensionRegistry#add for %s", extension), e); - } - } - } - - // ================================================================= - // Private stuff. - - // Constructors are package-private so that ExtensionRegistry can subclass - // this. - - ExtensionRegistryLite() { - this.extensionsByNumber = - new HashMap<ObjectIntPair, - GeneratedMessageLite.GeneratedExtension<?, ?>>(); - } - static final ExtensionRegistryLite EMPTY_REGISTRY_LITE = - new ExtensionRegistryLite(true); - - ExtensionRegistryLite(ExtensionRegistryLite other) { - if (other == EMPTY_REGISTRY_LITE) { - this.extensionsByNumber = Collections.emptyMap(); - } else { - this.extensionsByNumber = - Collections.unmodifiableMap(other.extensionsByNumber); - } - } - - private final Map<ObjectIntPair, - GeneratedMessageLite.GeneratedExtension<?, ?>> - extensionsByNumber; - - ExtensionRegistryLite(boolean empty) { - this.extensionsByNumber = Collections.emptyMap(); - } - - /** A (Object, int) pair, used as a map key. */ - private static final class ObjectIntPair { - private final Object object; - private final int number; - - ObjectIntPair(final Object object, final int number) { - this.object = object; - this.number = number; - } - - @Override - public int hashCode() { - return System.identityHashCode(object) * ((1 << 16) - 1) + number; - } - @Override - public boolean equals(final Object obj) { - if (!(obj instanceof ObjectIntPair)) { - return false; - } - final ObjectIntPair other = (ObjectIntPair)obj; - return object == other.object && number == other.number; - } - } -} |