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SPR-6909 Improve extension hooks in DefaultDataBinderFactory and subclasses.

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This commit is contained in:
Rossen Stoyanchev
2011-06-24 12:04:16 +00:00
parent 2122cbcb1b
commit 8e240d814b
4 changed files with 113 additions and 88 deletions
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67
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ServletRequestDataBinderFactory.java
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@@ -22,18 +22,17 @@ import java.util.Map;
import org.springframework.beans.MutablePropertyValues;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.support.WebBindingInitializer;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.method.annotation.InitBinderDataBinderFactory;
import org.springframework.web.method.support.InvocableHandlerMethod;
import org.springframework.web.servlet.HandlerMapping;
/**
* An {@link InitBinderDataBinderFactory} variation instantiating a data binder of type
* {@link ServletRequestDataBinder} and further extending it with the ability to add URI template variables
* to the values used in data binding.
* Creates a {@link ServletRequestDataBinder} instance and extends it with the ability to include
* URI template variables in the values used for data binding purposes.
*
* @author Rossen Stoyanchev
* @since 3.1
@@ -41,62 +40,44 @@ import org.springframework.web.servlet.HandlerMapping;
public class ServletRequestDataBinderFactory extends InitBinderDataBinderFactory {
/**
* Create an {@link ServletRequestDataBinderFactory} instance.
* @param initBinderMethods init binder methods to use to initialize new data binders.
* @param bindingInitializer a WebBindingInitializer to use to initialize created data binder instances.
* Create a new instance.
* @param binderMethods {@link InitBinder} methods to initialize new data binder instances with
* @param iitializer a global initializer to initialize new data binder instances with
*/
public ServletRequestDataBinderFactory(List<InvocableHandlerMethod> initBinderMethods,
WebBindingInitializer bindingInitializer) {
super(initBinderMethods, bindingInitializer);
}
/**
* Returns the more specific {@link ServletRequestDataBinder} created by {@link #createBinderInstance(Object, String)}.
*/
@Override
public ServletRequestDataBinder createBinder(NativeWebRequest request, Object target, String objectName)
throws Exception {
return (ServletRequestDataBinder) super.createBinder(request, target, objectName);
public ServletRequestDataBinderFactory(List<InvocableHandlerMethod> binderMethods, WebBindingInitializer iitializer) {
super(binderMethods, iitializer);
}
/**
* {@inheritDoc}
* <p>This method creates a {@link ServletRequestDataBinder} instance that also adds URI template variables to
* the values used in data binding.
* <p>Subclasses wishing to override this method to provide their own ServletRequestDataBinder type can use the
* {@link #addUriTemplateVariables(MutablePropertyValues)} method to include URI template variables as follows:
* <pre>
* return new CustomServletRequestDataBinder(target, objectName) {
* protected void doBind(MutablePropertyValues mpvs) {
* addUriTemplateVariables(mpvs);
* super.doBind(mpvs);
* }
* };
* </pre>
* Creates a {@link ServletRequestDataBinder} instance extended with the ability to add
* URI template variables the values used for data binding.
*/
@Override
protected WebDataBinder createBinderInstance(Object target, String objectName) {
protected WebDataBinder createBinderInstance(Object target, String objectName, final NativeWebRequest request) {
return new ServletRequestDataBinder(target, objectName) {
protected void doBind(MutablePropertyValues mpvs) {
addUriTemplateVariables(mpvs);
addUriTemplateVars(mpvs, request);
super.doBind(mpvs);
}
};
}
/**
* Adds URI template variables to the given property values.
* @param mpvs the PropertyValues to add URI template variables to
* Adds URI template variables to the the property values used for data binding.
* @param mpvs the PropertyValues to use for data binding
*/
@SuppressWarnings("unchecked")
protected void addUriTemplateVariables(MutablePropertyValues mpvs) {
RequestAttributes requestAttrs = RequestContextHolder.getRequestAttributes();
if (requestAttrs != null) {
String key = HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE;
int scope = RequestAttributes.SCOPE_REQUEST;
Map<String, String> uriTemplateVars = (Map<String, String>) requestAttrs.getAttribute(key, scope);
mpvs.addPropertyValues(uriTemplateVars);
protected final void addUriTemplateVars(MutablePropertyValues mpvs, NativeWebRequest request) {
Map<String, String> uriTemplateVars =
(Map<String, String>) request.getAttribute(
HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST);
if (uriTemplateVars != null){
for (String name : uriTemplateVars.keySet()) {
if (!mpvs.contains(name)) {
mpvs.addPropertyValue(name, uriTemplateVars.get(name));
}
}
}
}