| /* |
| * 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.layoutlib.bridge.android; |
| |
| import com.android.ide.common.rendering.api.ResourceNamespace; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| |
| /** |
| * A {@link ResourceNamespace.Resolver} that delegates to the given {@link XmlPullParser} and falls |
| * back to the "implicit" resolver which is assumed to contain namespaces predefined for the file |
| * being parsed. |
| * |
| * <p>Note that the parser will start giving different results as the underlying parser moves in the |
| * input, so it should either be discarded or reused with care. |
| */ |
| public class XmlPullParserResolver implements ResourceNamespace.Resolver { |
| private final XmlPullParser mParser; |
| private final ResourceNamespace.Resolver mImplicitNamespacesResolver; |
| |
| public XmlPullParserResolver( |
| @NonNull XmlPullParser parser, |
| @NonNull ResourceNamespace.Resolver implicitNamespacesResolver) { |
| mParser = parser; |
| mImplicitNamespacesResolver = implicitNamespacesResolver; |
| } |
| |
| @Override |
| @Nullable |
| public String prefixToUri(@NonNull String namespacePrefix) { |
| String result = mParser.getNamespace(namespacePrefix); |
| if (result == null) { |
| result = mImplicitNamespacesResolver.prefixToUri(namespacePrefix); |
| } |
| |
| return result; |
| } |
| |
| @Override |
| @Nullable |
| public String uriToPrefix(@NonNull String namespaceUri) { |
| // This is needed when creating new XML snippets, we don't need to support that. |
| throw new UnsupportedOperationException(); |
| } |
| } |