| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.layout.remote.api; |
| |
| import com.android.ide.common.rendering.api.ResourceNamespace.Resolver; |
| import com.android.ide.common.rendering.api.ResourceValue; |
| import com.android.layout.remote.util.RemoteResolverAdapter; |
| import com.android.tools.layoutlib.annotations.NotNull; |
| import com.android.tools.layoutlib.annotations.Nullable; |
| |
| import java.io.Serializable; |
| import java.rmi.RemoteException; |
| |
| /** |
| * Wrapper for {@link ResourceValue} that can be transferred to a different VM. |
| * |
| * @param <T> the ResourceValue instance type |
| */ |
| public class RemoteResourceValue<T extends ResourceValue> implements Serializable { |
| private static final RemoteResourceValue<ResourceValue> NULL_INSTANCE = |
| new RemoteResourceValue<>(null, null); |
| |
| private final T mResourceValue; |
| private final RemoteNamespaceResolver mRemoteResolver; |
| |
| private RemoteResourceValue(@Nullable T resourceValue, |
| @Nullable RemoteNamespaceResolver remoteResolver) { |
| mResourceValue = resourceValue; |
| mRemoteResolver = remoteResolver; |
| } |
| |
| /** |
| * Returns a RemoteResourceValue that wraps the given {@link ResourceValue} instance. The passed |
| * resource value can be null. |
| */ |
| @NotNull |
| public static <T extends ResourceValue> RemoteResourceValue<T> fromResourceValue( |
| T resourceValue) { |
| if (resourceValue == null) { |
| //noinspection unchecked |
| return (RemoteResourceValue<T>) NULL_INSTANCE; |
| } |
| try { |
| return new RemoteResourceValue<>(resourceValue, |
| RemoteResolverAdapter.create(resourceValue.getNamespaceResolver())); |
| |
| } catch (RemoteException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * Returns the {@link ResourceValue} wrapped by a remote wrapper |
| */ |
| @NotNull |
| private static <T extends ResourceValue> T toResourceValue( |
| @NotNull RemoteResourceValue<T> remoteResourceValue) { |
| T remoteValue = remoteResourceValue.mResourceValue; |
| if (remoteValue == null) { |
| return null; |
| } |
| |
| // The Resolver is not transferred in the ResourceValue (it's transient) so we use the |
| // information in the wrapper to reconstruct it. |
| RemoteNamespaceResolver remoteResolver = remoteResourceValue.mRemoteResolver; |
| |
| // TODO: Rethink this as setNamespaceResolver is not available in prebuilts any more |
| // if (remoteResolver != null) { |
| // remoteValue.setNamespaceResolver(new Resolver() { |
| // @Override |
| // public String prefixToUri(String namespacePrefix) { |
| // try { |
| // return remoteResolver.remotePrefixToUri(namespacePrefix); |
| // } catch (RemoteException e) { |
| // throw new RuntimeException(e); |
| // } |
| // } |
| // |
| // @Override |
| // public String uriToPrefix(String namespaceUri) { |
| // try { |
| // return remoteResolver.remoteUriToPrefix(namespaceUri); |
| // } catch (RemoteException e) { |
| // throw new RuntimeException(e); |
| // } |
| // } |
| // }); |
| // } |
| // else { |
| // remoteValue.setNamespaceResolver(Resolver.EMPTY_RESOLVER); |
| // } |
| |
| return remoteValue; |
| } |
| |
| /** |
| * Returns the {@link ResourceValue} wrapped by this remote wrapper |
| */ |
| @NotNull |
| public T toResourceValue() { |
| return RemoteResourceValue.toResourceValue(this); |
| } |
| } |