| /* |
| * Copyright (C) 2014 The Dagger Authors. |
| * |
| * 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 dagger.internal.codegen.binding; |
| |
| import static dagger.internal.codegen.binding.SourceFiles.simpleVariableName; |
| |
| import com.google.auto.common.MoreTypes; |
| import com.google.common.base.Ascii; |
| import com.google.common.base.CaseFormat; |
| import dagger.Lazy; |
| import dagger.model.DependencyRequest; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import javax.inject.Provider; |
| |
| /** |
| * Picks a reasonable name for what we think is being provided from the variable name associated |
| * with the {@link DependencyRequest}. I.e. strips out words like "lazy" and "provider" if we |
| * believe that those refer to {@link Lazy} and {@link Provider} rather than the type being |
| * provided. |
| */ |
| //TODO(gak): develop the heuristics to get better names |
| final class DependencyVariableNamer { |
| private static final Pattern LAZY_PROVIDER_PATTERN = Pattern.compile("lazy(\\w+)Provider"); |
| |
| static String name(DependencyRequest dependency) { |
| if (!dependency.requestElement().isPresent()) { |
| return simpleVariableName(MoreTypes.asTypeElement(dependency.key().type())); |
| } |
| |
| String variableName = dependency.requestElement().get().getSimpleName().toString(); |
| if (Ascii.isUpperCase(variableName.charAt(0))) { |
| variableName = toLowerCamel(variableName); |
| } |
| switch (dependency.kind()) { |
| case INSTANCE: |
| return variableName; |
| case LAZY: |
| return variableName.startsWith("lazy") && !variableName.equals("lazy") |
| ? toLowerCamel(variableName.substring(4)) |
| : variableName; |
| case PROVIDER_OF_LAZY: |
| Matcher matcher = LAZY_PROVIDER_PATTERN.matcher(variableName); |
| if (matcher.matches()) { |
| return toLowerCamel(matcher.group(1)); |
| } |
| // fall through |
| case PROVIDER: |
| return variableName.endsWith("Provider") && !variableName.equals("Provider") |
| ? variableName.substring(0, variableName.length() - 8) |
| : variableName; |
| case PRODUCED: |
| return variableName.startsWith("produced") && !variableName.equals("produced") |
| ? toLowerCamel(variableName.substring(8)) |
| : variableName; |
| case PRODUCER: |
| return variableName.endsWith("Producer") && !variableName.equals("Producer") |
| ? variableName.substring(0, variableName.length() - 8) |
| : variableName; |
| default: |
| throw new AssertionError(); |
| } |
| } |
| |
| private static String toLowerCamel(String name) { |
| return CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_CAMEL, name); |
| } |
| } |