| // 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 com.google.protobuf.Descriptors.Descriptor; |
| import com.google.protobuf.Descriptors.FileDescriptor; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.logging.Logger; |
| |
| /** |
| * A TypeRegistry is used to resolve Any messages. You must provide a TypeRegistry containing all |
| * message types used in Any message fields. |
| */ |
| public class TypeRegistry { |
| private static final Logger logger = Logger.getLogger(TypeRegistry.class.getName()); |
| |
| private static class EmptyTypeRegistryHolder { |
| private static final TypeRegistry EMPTY = |
| new TypeRegistry(Collections.<String, Descriptor>emptyMap()); |
| } |
| |
| public static TypeRegistry getEmptyTypeRegistry() { |
| return EmptyTypeRegistryHolder.EMPTY; |
| } |
| |
| |
| public static Builder newBuilder() { |
| return new Builder(); |
| } |
| |
| /** |
| * Find a type by its full name. Returns null if it cannot be found in this {@link TypeRegistry}. |
| */ |
| public Descriptor find(String name) { |
| return types.get(name); |
| } |
| |
| /** |
| * Find a type by its typeUrl. Returns null if it cannot be found in this {@link TypeRegistry}. |
| */ |
| public final Descriptor getDescriptorForTypeUrl(String typeUrl) |
| throws InvalidProtocolBufferException { |
| return find(getTypeName(typeUrl)); |
| } |
| |
| private final Map<String, Descriptor> types; |
| |
| TypeRegistry(Map<String, Descriptor> types) { |
| this.types = types; |
| } |
| |
| private static String getTypeName(String typeUrl) throws InvalidProtocolBufferException { |
| String[] parts = typeUrl.split("/"); |
| if (parts.length == 1) { |
| throw new InvalidProtocolBufferException("Invalid type url found: " + typeUrl); |
| } |
| return parts[parts.length - 1]; |
| } |
| |
| /** A Builder is used to build {@link TypeRegistry}. */ |
| public static final class Builder { |
| private Builder() {} |
| |
| /** |
| * Adds a message type and all types defined in the same .proto file as well as all transitively |
| * imported .proto files to this {@link Builder}. |
| */ |
| public Builder add(Descriptor messageType) { |
| if (types == null) { |
| throw new IllegalStateException("A TypeRegistry.Builder can only be used once."); |
| } |
| addFile(messageType.getFile()); |
| return this; |
| } |
| |
| /** |
| * Adds message types and all types defined in the same .proto file as well as all transitively |
| * imported .proto files to this {@link Builder}. |
| */ |
| public Builder add(Iterable<Descriptor> messageTypes) { |
| if (types == null) { |
| throw new IllegalStateException("A TypeRegistry.Builder can only be used once."); |
| } |
| for (Descriptor type : messageTypes) { |
| addFile(type.getFile()); |
| } |
| return this; |
| } |
| |
| /** Builds a {@link TypeRegistry}. This method can only be called once for one Builder. */ |
| public TypeRegistry build() { |
| TypeRegistry result = new TypeRegistry(types); |
| // Make sure the built {@link TypeRegistry} is immutable. |
| types = null; |
| return result; |
| } |
| |
| private void addFile(FileDescriptor file) { |
| // Skip the file if it's already added. |
| if (!files.add(file.getFullName())) { |
| return; |
| } |
| for (FileDescriptor dependency : file.getDependencies()) { |
| addFile(dependency); |
| } |
| for (Descriptor message : file.getMessageTypes()) { |
| addMessage(message); |
| } |
| } |
| |
| private void addMessage(Descriptor message) { |
| for (Descriptor nestedType : message.getNestedTypes()) { |
| addMessage(nestedType); |
| } |
| |
| if (types.containsKey(message.getFullName())) { |
| logger.warning("Type " + message.getFullName() + " is added multiple times."); |
| return; |
| } |
| |
| types.put(message.getFullName(), message); |
| } |
| |
| private final Set<String> files = new HashSet<>(); |
| private Map<String, Descriptor> types = new HashMap<>(); |
| } |
| } |