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/*
* Copyright 2002-2005 the original author or authors.
*
* 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 org.springframework.web.bind;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import org.springframework.validation.BindException;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;
/**
* Offers convenience methods for binding servlet request parameters
* to objects, including optional validation.
*
* @author Juergen Hoeller
* @author Jean-Pierre Pawlak
* @since 10.03.2003
*/
public abstract class BindUtils {
/**
* Bind the parameters from the given request to the given object.
* @param request request containing the parameters
* @param object object to bind the parameters to
* @param objectName name of the bind object
* @return the binder used (can be treated as BindException or Errors instance)
*/
public static BindException bind(ServletRequest request, Object object, String objectName) {
ServletRequestDataBinder binder = new ServletRequestDataBinder(object, objectName);
binder.bind(request);
return binder.getErrors();
}
/**
* Bind the parameters from the given request to the given object,
* allowing for optional custom editors set in an bind initializer.
* @param request request containing the parameters
* @param object object to bind the parameters to
* @param objectName name of the bind object
* @param initializer implementation of the BindInitializer interface
* which will be able to set custom editors
* @return the binder used (can be treated as BindException or Errors instance)
* @throws ServletException if thrown by the BindInitializer
*/
public static BindException bind(ServletRequest request, Object object, String objectName,
BindInitializer initializer) throws ServletException {
ServletRequestDataBinder binder = new ServletRequestDataBinder(object, objectName);
if (initializer != null) {
initializer.initBinder(request, binder);
}
binder.bind(request);
return binder.getErrors();
}
/**
* Bind the parameters from the given request to the given object,
* invoking the given validator.
* @param request request containing the parameters
* @param object object to bind the parameters to
* @param objectName name of the bind object
* @param validator validator to be invoked, or null if no validation
* @return the binder used (can be treated as Errors instance)
*/
public static BindException bindAndValidate(ServletRequest request, Object object, String objectName,
Validator validator) {
BindException binder = bind(request, object, objectName);
ValidationUtils.invokeValidator(validator, object, binder);
return binder;
}
/**
* Bind the parameters from the given request to the given object,
* invoking the given validator, and allowing for optional custom editors
* set in an bind initializer.
* @param request request containing the parameters
* @param object object to bind the parameters to
* @param objectName name of the bind object
* @param validator validator to be invoked, or null if no validation
* @param initializer Implementation of the BindInitializer interface which will be able to set custom editors
* @return the binder used (can be treated as Errors instance)
* @throws ServletException if thrown by the BindInitializer
*/
public static BindException bindAndValidate(ServletRequest request, Object object, String objectName,
Validator validator, BindInitializer initializer)
throws ServletException {
BindException binder = bind(request, object, objectName, initializer);
ValidationUtils.invokeValidator(validator, object, binder);
return binder;
}
}
