com.manorrock.oyena.lifecycle.rest.DefaultRestParameterProducer Maven / Gradle / Ivy
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package com.manorrock.oyena.lifecycle.rest;
import jakarta.enterprise.context.ApplicationScoped;
import jakarta.enterprise.inject.Any;
import jakarta.enterprise.inject.spi.CDI;
import jakarta.faces.FacesException;
import jakarta.faces.context.FacesContext;
import java.lang.annotation.Annotation;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* The default REST parameter producer.
*
* @author Manfred Riem ([email protected])
*/
@ApplicationScoped
public class DefaultRestParameterProducer implements RestParameterProducer {
/**
* Produce an instance for the given type.
*
* @param facesContext the Faces context.
* @param restMappingMatch the REST mapping match.
* @param parameterType the parameter type.
* @param parameterAnnotations the parameter annotations.
* @return the instance.
*/
@Override
public Object produce(FacesContext facesContext,
RestMappingMatch restMappingMatch, Class parameterType,
Annotation[] parameterAnnotations) {
RestHeaderParameter header = getRestHeaderParameterAnnotation(parameterAnnotations);
if (header != null) {
String[] value = facesContext.getExternalContext().getRequestHeaderValuesMap().get(header.value());
return value != null ? value : new String[] {};
}
RestPathParameter path = getRestPathParameterAnnotation(parameterAnnotations);
if (path != null) {
Pattern pattern = Pattern.compile(restMappingMatch.getRestPath());
Matcher matcher = pattern.matcher(restMappingMatch.getPathInfo());
if (matcher.matches()) {
return matcher.group(path.value());
} else {
throw new FacesException("Unable to match @RestPathParameter: " + path.value());
}
}
RestQueryParameter query = getRestQueryParameterAnnotation(parameterAnnotations);
if (query != null) {
return facesContext.getExternalContext().getRequestParameterMap().get(query.value());
}
return CDI.current().select(parameterType, Any.Literal.INSTANCE).get();
}
/**
* Get the @RestHeaderParameter annotation (if present).
*
* @return the @RestHeaderParameter annotation, or null if not present.
*/
private RestHeaderParameter getRestHeaderParameterAnnotation(Annotation[] annotations) {
RestHeaderParameter result = null;
if (annotations != null && annotations.length > 0) {
for (Annotation annotation : annotations) {
if (annotation instanceof RestHeaderParameter restHeaderParameter) {
result = restHeaderParameter;
break;
}
}
}
return result;
}
/**
* Get the @RestPathParameter annotation (if present).
*
* @return the @RestPathParameter annotation, or null if not present.
*/
private RestPathParameter getRestPathParameterAnnotation(Annotation[] annotations) {
RestPathParameter result = null;
if (annotations != null && annotations.length > 0) {
for (Annotation annotation : annotations) {
if (annotation instanceof RestPathParameter restPathParameter) {
result = restPathParameter;
break;
}
}
}
return result;
}
/**
* Get the @RestQueryParameter annotation (if present).
*
* @return the @RestQueryParameter annotation, or null if not present.
*/
private RestQueryParameter getRestQueryParameterAnnotation(Annotation[] annotations) {
RestQueryParameter result = null;
if (annotations != null && annotations.length > 0) {
for (Annotation annotation : annotations) {
if (annotation instanceof RestQueryParameter restQueryParameter) {
result = restQueryParameter;
break;
}
}
}
return result;
}
}