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/*
* Copyright (c) 2012, 2021 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018 Payara Foundation and/or its affiliates.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.internal.inject;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.security.AccessController;
import java.text.ParseException;
import java.util.Date;
import java.util.List;
import java.util.Optional;
import java.util.OptionalDouble;
import java.util.OptionalInt;
import java.util.OptionalLong;
import javax.inject.Inject;
import javax.inject.Singleton;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.ext.ParamConverter;
import javax.ws.rs.ext.ParamConverterProvider;
import org.glassfish.jersey.internal.LocalizationMessages;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import org.glassfish.jersey.internal.util.collection.ClassTypePair;
import org.glassfish.jersey.message.internal.HttpDateFormat;
/**
* Container of several different {@link ParamConverterProvider param converter providers}
* implementations. The nested provider implementations encapsulate various different
* strategies of constructing an instance from a {@code String} value.
*
* @author Paul Sandoz
* @author Marek Potociar
*/
@Singleton
public class ParamConverters {
private abstract static class AbstractStringReader implements ParamConverter {
@Override
public T fromString(final String value) {
if (value == null) {
throw new IllegalArgumentException(LocalizationMessages.METHOD_PARAMETER_CANNOT_BE_NULL("value"));
}
try {
return _fromString(value);
} catch (final InvocationTargetException ex) {
// if the value is an empty string, return null
if (value.isEmpty()) {
return null;
}
final Throwable cause = ex.getCause();
if (cause instanceof WebApplicationException) {
throw (WebApplicationException) cause;
} else {
throw new ExtractorException(cause);
}
} catch (final Exception ex) {
throw new ProcessingException(ex);
}
}
protected abstract T _fromString(String value) throws Exception;
@Override
public String toString(final T value) throws IllegalArgumentException {
if (value == null) {
throw new IllegalArgumentException(LocalizationMessages.METHOD_PARAMETER_CANNOT_BE_NULL("value"));
}
return value.toString();
}
}
/**
* Provider of {@link ParamConverter param converter} that produce the target Java type instance
* by invoking a single {@code String} parameter constructor on the target type.
*/
@Singleton
public static class StringConstructor implements ParamConverterProvider {
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
final Constructor constructor = AccessController.doPrivileged(ReflectionHelper.getStringConstructorPA(rawType));
return (constructor == null) ? null : new AbstractStringReader() {
@Override
protected T _fromString(final String value) throws Exception {
return rawType.cast(constructor.newInstance(value));
}
};
}
}
/**
* Provider of {@link ParamConverter param converter} that produce the target Java type instance
* by invoking a static {@code valueOf(String)} method on the target type.
*/
@Singleton
public static class TypeValueOf implements ParamConverterProvider {
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
final Method valueOf = AccessController.doPrivileged(ReflectionHelper.getValueOfStringMethodPA(rawType));
return (valueOf == null) ? null : new AbstractStringReader() {
@Override
public T _fromString(final String value) throws Exception {
return rawType.cast(valueOf.invoke(null, value));
}
};
}
}
/**
* Provider of {@link ParamConverter param converter} that produce the target Java type instance
* by invoking a static {@code fromString(String)} method on the target type.
*/
@Singleton
public static class TypeFromString implements ParamConverterProvider {
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
final Method fromStringMethod = AccessController.doPrivileged(ReflectionHelper.getFromStringStringMethodPA(rawType));
return (fromStringMethod == null) ? null : new AbstractStringReader() {
@Override
public T _fromString(final String value) throws Exception {
return rawType.cast(fromStringMethod.invoke(null, value));
}
};
}
}
/**
* Provider of {@link ParamConverter param converter} that produce the target Java {@link Enum enum} type instance
* by invoking a static {@code fromString(String)} method on the target enum type.
*/
@Singleton
public static class TypeFromStringEnum extends TypeFromString {
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
return (!Enum.class.isAssignableFrom(rawType)) ? null : super.getConverter(rawType, genericType, annotations);
}
}
@Singleton
public static class CharacterProvider implements ParamConverterProvider {
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
if (rawType.equals(Character.class)) {
return new ParamConverter() {
@Override
public T fromString(String value) {
if (value == null || value.isEmpty()) {
return null;
// throw new IllegalStateException(LocalizationMessages.METHOD_PARAMETER_CANNOT_BE_NULL("value"));
}
if (value.length() == 1) {
return rawType.cast(value.charAt(0));
}
throw new ExtractorException(LocalizationMessages.ERROR_PARAMETER_INVALID_CHAR_VALUE(value));
}
@Override
public String toString(T value) {
if (value == null) {
throw new IllegalArgumentException(LocalizationMessages.METHOD_PARAMETER_CANNOT_BE_NULL("value"));
}
return value.toString();
}
};
}
return null;
}
}
/**
* Provider of {@link ParamConverter param converter} that convert the supplied string into a Java
* {@link Date} instance using conversion method from the
* {@link HttpDateFormat http date formatter} utility class.
*/
@Singleton
public static class DateProvider implements ParamConverterProvider {
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
return (rawType != Date.class) ? null : new ParamConverter() {
@Override
public T fromString(final String value) {
if (value == null) {
throw new IllegalArgumentException(LocalizationMessages.METHOD_PARAMETER_CANNOT_BE_NULL("value"));
}
try {
return rawType.cast(HttpDateFormat.readDate(value));
} catch (final ParseException ex) {
throw new ExtractorException(ex);
}
}
@Override
public String toString(final T value) throws IllegalArgumentException {
if (value == null) {
throw new IllegalArgumentException(LocalizationMessages.METHOD_PARAMETER_CANNOT_BE_NULL("value"));
}
return value.toString();
}
};
}
}
/**
* Provider of {@link ParamConverter param converter} that produce the Optional instance
* by invoking {@link ParamConverterProvider}.
*/
@Singleton
public static class OptionalCustomProvider implements ParamConverterProvider {
// Delegates to this provider when the type of Optional is extracted.
private final InjectionManager manager;
public OptionalCustomProvider(InjectionManager manager) {
this.manager = manager;
}
@Override
public ParamConverter getConverter(Class rawType, Type genericType, Annotation[] annotations) {
return (rawType != Optional.class) ? null : new ParamConverter() {
@Override
public T fromString(String value) {
if (value == null) {
return (T) Optional.empty();
} else {
final List ctps = ReflectionHelper.getTypeArgumentAndClass(genericType);
final ClassTypePair ctp = (ctps.size() == 1) ? ctps.get(0) : null;
for (ParamConverterProvider provider : Providers.getProviders(manager, ParamConverterProvider.class)) {
final ParamConverter converter = provider.getConverter(ctp.rawClass(), ctp.type(), annotations);
if (converter != null) {
return (T) Optional.of(value).map(s -> converter.fromString(value));
}
}
/*
* In this case we don't send Optional.empty() because 'value' is not null.
* But we return null because the provider didn't find how to parse it.
*/
return null;
}
}
@Override
public String toString(T value) throws IllegalArgumentException {
/*
* Unfortunately 'orElse' cannot be stored in an Optional. As only one value can
* be stored, it makes no sense that 'value' is Optional. It can just be the value.
* We don't fail here but we don't process it.
*/
return null;
}
};
}
}
/**
* Provider of {@link ParamConverter param converter} that produce the OptionalInt, OptionalDouble
* or OptionalLong instance.
*/
@Singleton
public static class OptionalProvider implements ParamConverterProvider {
@Override
public ParamConverter getConverter(Class rawType, Type genericType, Annotation[] annotations) {
final Optionals optionals = Optionals.getOptional(rawType);
return (optionals == null) ? null : new ParamConverter() {
@Override
public T fromString(String value) {
if (value == null) {
return (T) optionals.empty();
} else {
return (T) optionals.of(value);
}
}
@Override
public String toString(T value) throws IllegalArgumentException {
/*
* Unfortunately 'orElse' cannot be stored in an Optional. As only one value can
* be stored, it makes no sense that 'value' is Optional. It can just be the value.
* We don't fail here but we don't process it.
*/
return null;
}
};
}
private static enum Optionals {
OPTIONAL_INT(OptionalInt.class) {
@Override
Object empty() {
return OptionalInt.empty();
}
@Override
Object of(Object value) {
return OptionalInt.of(Integer.parseInt((String) value));
}
}, OPTIONAL_DOUBLE(OptionalDouble.class) {
@Override
Object empty() {
return OptionalDouble.empty();
}
@Override
Object of(Object value) {
return OptionalDouble.of(Double.parseDouble((String) value));
}
}, OPTIONAL_LONG(OptionalLong.class) {
@Override
Object empty() {
return OptionalLong.empty();
}
@Override
Object of(Object value) {
return OptionalLong.of(Long.parseLong((String) value));
}
};
private final Class clazz;
private Optionals(Class clazz) {
this.clazz = clazz;
}
private static Optionals getOptional(Class clazz) {
for (Optionals optionals : Optionals.values()) {
if (optionals.clazz == clazz) {
return optionals;
}
}
return null;
}
abstract Object empty();
abstract Object of(Object value);
}
}
/**
* Aggregated {@link ParamConverterProvider param converter provider}.
*/
@Singleton
public static class AggregatedProvider implements ParamConverterProvider {
private final ParamConverterProvider[] providers;
/**
* Create new aggregated {@link ParamConverterProvider param converter provider}.
*/
@Inject
public AggregatedProvider(InjectionManager manager) {
this.providers = new ParamConverterProvider[] {
// ordering is important (e.g. Date provider must be executed before String Constructor
// as Date has a deprecated String constructor
new DateProvider(),
new TypeFromStringEnum(),
new TypeValueOf(),
new CharacterProvider(),
new TypeFromString(),
new StringConstructor(),
new OptionalCustomProvider(manager),
new OptionalProvider()
};
}
@Override
public ParamConverter getConverter(final Class rawType,
final Type genericType,
final Annotation[] annotations) {
for (final ParamConverterProvider p : providers) {
// This iteration trough providers is important. It can't be replaced by just registering all the internal
// providers of this class. Using iteration trough array the correct ordering of providers is ensured (see
// javadoc of PathParam, HeaderParam, ... - there is defined a fixed order of constructing objects form Strings).
final ParamConverter reader = p.getConverter(rawType, genericType, annotations);
if (reader != null) {
return reader;
}
}
return null;
}
}
}
