| /** |
| * Copyright (C) 2008 Google Inc. |
| * |
| * 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.google.inject; |
| |
| import com.google.inject.commands.ConvertToTypesCommand; |
| import com.google.inject.internal.Errors; |
| import com.google.inject.internal.MatcherAndConverter; |
| import com.google.inject.internal.SourceProvider; |
| import com.google.inject.internal.Strings; |
| import com.google.inject.matcher.AbstractMatcher; |
| import com.google.inject.matcher.Matcher; |
| import com.google.inject.matcher.Matchers; |
| import com.google.inject.spi.TypeConverter; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Type; |
| import java.util.List; |
| |
| /** |
| * Handles {@link Binder#convertToTypes} commands. |
| * |
| * @author crazybob@google.com (Bob Lee) |
| * @author jessewilson@google.com (Jesse Wilson) |
| */ |
| class ConvertToTypesCommandProcessor extends CommandProcessor { |
| |
| private final List<MatcherAndConverter> converters; |
| |
| ConvertToTypesCommandProcessor(Errors errors, List<MatcherAndConverter> converters) { |
| super(errors); |
| this.converters = converters; |
| |
| // Configure type converters. |
| convertToPrimitiveType(int.class, Integer.class); |
| convertToPrimitiveType(long.class, Long.class); |
| convertToPrimitiveType(boolean.class, Boolean.class); |
| convertToPrimitiveType(byte.class, Byte.class); |
| convertToPrimitiveType(short.class, Short.class); |
| convertToPrimitiveType(float.class, Float.class); |
| convertToPrimitiveType(double.class, Double.class); |
| |
| convertToClass(Character.class, new TypeConverter() { |
| public Object convert(String value, TypeLiteral<?> toType) { |
| value = value.trim(); |
| if (value.length() != 1) { |
| throw new RuntimeException("Length != 1."); |
| } |
| return value.charAt(0); |
| } |
| |
| @Override public String toString() { |
| return "TypeConverter<Character>"; |
| } |
| }); |
| |
| convertToClasses(Matchers.subclassesOf(Enum.class), new TypeConverter() { |
| @SuppressWarnings("unchecked") |
| public Object convert(String value, TypeLiteral<?> toType) { |
| return Enum.valueOf((Class) toType.getRawType(), value); |
| } |
| |
| @Override public String toString() { |
| return "TypeConverter<E extends Enum<E>>"; |
| } |
| }); |
| |
| internalConvertToTypes( |
| new AbstractMatcher<TypeLiteral<?>>() { |
| public boolean matches(TypeLiteral<?> typeLiteral) { |
| return typeLiteral.getRawType() == Class.class; |
| } |
| |
| @Override public String toString() { |
| return "Class<?>"; |
| } |
| }, |
| new TypeConverter() { |
| @SuppressWarnings("unchecked") |
| public Object convert(String value, TypeLiteral<?> toType) { |
| try { |
| return Class.forName(value); |
| } |
| catch (ClassNotFoundException e) { |
| throw new RuntimeException(e.getMessage()); |
| } |
| } |
| |
| @Override public String toString() { |
| return "TypeConverter<Class<?>>"; |
| } |
| } |
| ); |
| } |
| |
| private <T> void convertToPrimitiveType(Class<T> primitiveType, |
| final Class<T> wrapperType) { |
| try { |
| final Method parser = wrapperType.getMethod( |
| "parse" + Strings.capitalize(primitiveType.getName()), String.class); |
| |
| TypeConverter typeConverter = new TypeConverter() { |
| @SuppressWarnings("unchecked") |
| public Object convert(String value, TypeLiteral<?> toType) { |
| try { |
| return parser.invoke(null, value); |
| } |
| catch (IllegalAccessException e) { |
| throw new AssertionError(e); |
| } |
| catch (InvocationTargetException e) { |
| throw new RuntimeException(e.getTargetException().getMessage()); |
| } |
| } |
| |
| @Override public String toString() { |
| return "TypeConverter<" + wrapperType.getSimpleName() + ">"; |
| } |
| }; |
| |
| convertToClass(wrapperType, typeConverter); |
| } catch (NoSuchMethodException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| private <T> void convertToClass(Class<T> type, TypeConverter converter) { |
| convertToClasses(Matchers.identicalTo(type), converter); |
| } |
| |
| private void convertToClasses(final Matcher<? super Class<?>> typeMatcher, |
| TypeConverter converter) { |
| internalConvertToTypes(new AbstractMatcher<TypeLiteral<?>>() { |
| public boolean matches(TypeLiteral<?> typeLiteral) { |
| Type type = typeLiteral.getType(); |
| if (!(type instanceof Class)) { |
| return false; |
| } |
| Class<?> clazz = (Class<?>) type; |
| return typeMatcher.matches(clazz); |
| } |
| |
| @Override public String toString() { |
| return typeMatcher.toString(); |
| } |
| }, converter); |
| } |
| |
| private void internalConvertToTypes(Matcher<? super TypeLiteral<?>> typeMatcher, |
| TypeConverter converter) { |
| converters.add(new MatcherAndConverter(typeMatcher, converter, SourceProvider.UNKNOWN_SOURCE)); |
| } |
| |
| @Override public Boolean visitConvertToTypes(ConvertToTypesCommand command) { |
| converters.add(new MatcherAndConverter( |
| command.getTypeMatcher(), command.getTypeConverter(), command.getSource())); |
| return true; |
| } |
| } |