android-35/com/google/protobuf/ExtensionRegistryLite.java - platform/prebuilts/fullsdk/sources - Git at Google

 // 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 [email protected] 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;

   // short circuit the ExtensionRegistryFactory via assumevalues trickery
   @SuppressWarnings("JavaOptionalSuggestions")
   private static boolean doFullRuntimeInheritanceCheck = true;

   // Visible for testing.
   static final String EXTENSION_CLASS_NAME = "com.google.protobuf.Extension";

   private static class ExtensionClassHolder {
     static final Class<?> INSTANCE = resolveExtensionClass();

     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;
       }
     }
   }

   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 doFullRuntimeInheritanceCheck
         ? ExtensionRegistryFactory.create()
         : new ExtensionRegistryLite();
   }

   private static volatile ExtensionRegistryLite emptyRegistry;

   /**
    * 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() {
     ExtensionRegistryLite result = emptyRegistry;
     if (result == null) {
       synchronized (ExtensionRegistryLite.class) {
         result = emptyRegistry;
         if (result == null) {
           result =
               emptyRegistry =
                   doFullRuntimeInheritanceCheck
                       ? ExtensionRegistryFactory.createEmpty()
                       : EMPTY_REGISTRY_LITE;
         }
       }
     }
     return result;
   }


   /** 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 (doFullRuntimeInheritanceCheck && ExtensionRegistryFactory.isFullRegistry(this)) {
       try {
         this.getClass().getMethod("add", ExtensionClassHolder.INSTANCE).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;
     }
   }
 }
	// 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 [email protected] 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;

	// short circuit the ExtensionRegistryFactory via assumevalues trickery
	@SuppressWarnings("JavaOptionalSuggestions")
	private static boolean doFullRuntimeInheritanceCheck = true;

	// Visible for testing.
	static final String EXTENSION_CLASS_NAME = "com.google.protobuf.Extension";

	private static class ExtensionClassHolder {
	static final Class<?> INSTANCE = resolveExtensionClass();

	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;
	}
	}
	}

	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 doFullRuntimeInheritanceCheck
	? ExtensionRegistryFactory.create()
	: new ExtensionRegistryLite();
	}

	private static volatile ExtensionRegistryLite emptyRegistry;

	/**
	* 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() {
	ExtensionRegistryLite result = emptyRegistry;
	if (result == null) {
	synchronized (ExtensionRegistryLite.class) {
	result = emptyRegistry;
	if (result == null) {
	result =
	emptyRegistry =
	doFullRuntimeInheritanceCheck
	? ExtensionRegistryFactory.createEmpty()
	: EMPTY_REGISTRY_LITE;
	}
	}
	}
	return result;
	}


	/** 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 (doFullRuntimeInheritanceCheck && ExtensionRegistryFactory.isFullRegistry(this)) {
	try {
	this.getClass().getMethod("add", ExtensionClassHolder.INSTANCE).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;
	}
	}
	}