/
DynamicParamValueProducer.java
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/
DynamicParamValueProducer.java
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/*
* Copyright OmniFaces
*
* 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
*
* https://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 org.omnifaces.cdi.param;
import static java.util.Arrays.asList;
import static java.util.Collections.emptySet;
import static org.omnifaces.util.Beans.getCurrentInjectionPoint;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import jakarta.enterprise.context.Dependent;
import jakarta.enterprise.context.spi.CreationalContext;
import jakarta.enterprise.inject.Typed;
import jakarta.enterprise.inject.spi.Bean;
import jakarta.enterprise.inject.spi.InjectionPoint;
import jakarta.enterprise.inject.spi.PassivationCapable;
import jakarta.enterprise.util.AnnotationLiteral;
import jakarta.faces.convert.Converter;
import jakarta.faces.validator.Validator;
import org.omnifaces.cdi.Param;
/**
* Dynamic CDI producer used to work around CDI's restriction to create true generic producers.
* <p>
* This dynamic producer calls through to the "real" producer for <code>@</code>{@link Param}
* annotated injection points.
*
* @see ParamExtension
* @see ParamProducer
*
* @since 2.0
* @author Arjan Tijms
*
*/
@Typed
public class DynamicParamValueProducer implements Bean<Object>, PassivationCapable {
private Set<Type> types;
/**
* Construct dynamic param value producer for given type.
* @param type Type to construct dynamic param value producer for.
*/
public DynamicParamValueProducer(Type type) {
types = new HashSet<>(asList(type, Object.class));
}
@Override
public Class<?> getBeanClass() {
return ParamProducer.class;
}
@Override
public Set<Type> getTypes() {
return types;
}
@Override
public Object create(CreationalContext<Object> creationalContext) {
InjectionPoint injectionPoint = getCurrentInjectionPoint(creationalContext);
ParamValue<?> paramValue = new ParamProducer().produce(injectionPoint);
return paramValue.getValue();
}
@Override
public Set<Annotation> getQualifiers() {
return Collections.singleton((Annotation) new DefaultParamAnnotationLiteral());
}
@Override
public Class<? extends Annotation> getScope() {
return Dependent.class;
}
@Override
public Set<Class<? extends Annotation>> getStereotypes() {
return emptySet();
}
@Override
public Set<InjectionPoint> getInjectionPoints() {
return emptySet();
}
@Override
public boolean isAlternative() {
return false;
}
@Override
public boolean isNullable() {
return false;
}
@Override
public String getName() {
return null;
}
@Override
public void destroy(Object instance, CreationalContext<Object> creationalContext) {
// NOOP
}
@Override
public String getId() {
return DynamicParamValueProducer.class.getName() + "_" + (types != null ? types.toString() : "");
}
/**
* {@link AnnotationLiteral} for {@link Param}.
*/
@SuppressWarnings("all")
public static class DefaultParamAnnotationLiteral extends AnnotationLiteral<Param> implements Param {
private static final long serialVersionUID = 1L;
private static final String[] EMPTY_STRING_ARRAY = {};
private static final Class<? extends Validator>[] EMPTY_VALIDATOR_ARRAY = new Class[0];
private static final Attribute[] EMPTY_ATTRIBUTE_ARRAY = {};
@Override
public String name() {
return "";
}
@Override
public int pathIndex() {
return -1;
}
@Override
public String label() {
return "";
}
@Override
public String converter() {
return "";
}
@Override
public boolean required() {
return false;
}
@Override
public String[] validators() {
return EMPTY_STRING_ARRAY;
}
@Override
public Class<? extends Converter> converterClass() {
return Converter.class;
}
@Override
public Class<? extends Validator>[] validatorClasses() {
return EMPTY_VALIDATOR_ARRAY;
}
@Override
public Attribute[] converterAttributes() {
return EMPTY_ATTRIBUTE_ARRAY;
}
@Override
public Attribute[] validatorAttributes() {
return EMPTY_ATTRIBUTE_ARRAY;
}
@Override
public String converterMessage() {
return "";
}
@Override
public String validatorMessage() {
return "";
}
@Override
public String requiredMessage() {
return "";
}
@Override
public boolean disableBeanValidation() {
return false;
}
@Override
public boolean overrideGlobalBeanValidationDisabled() {
return false;
}
}
}