/*
* Copyright 2002-2018 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.
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package org.springframework.validation;
import org.springframework.beans.PropertyAccessException;
import org.springframework.context.support.DefaultMessageSourceResolvable;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;
Default BindingErrorProcessor implementation. Uses the "required" error code and the field name to resolve message codes
for a missing field error.
Creates a FieldError for each PropertyAccessException given, using the PropertyAccessException's error code ("typeMismatch", "methodInvocation") for resolving message codes.
Author: Alef Arendsen, Juergen Hoeller See Also: Since: 1.2
/**
* Default {@link BindingErrorProcessor} implementation.
*
* <p>Uses the "required" error code and the field name to resolve message codes
* for a missing field error.
*
* <p>Creates a {@code FieldError} for each {@code PropertyAccessException}
* given, using the {@code PropertyAccessException}'s error code ("typeMismatch",
* "methodInvocation") for resolving message codes.
*
* @author Alef Arendsen
* @author Juergen Hoeller
* @since 1.2
* @see #MISSING_FIELD_ERROR_CODE
* @see DataBinder#setBindingErrorProcessor
* @see BeanPropertyBindingResult#addError
* @see BeanPropertyBindingResult#resolveMessageCodes
* @see org.springframework.beans.PropertyAccessException#getErrorCode
* @see org.springframework.beans.TypeMismatchException#ERROR_CODE
* @see org.springframework.beans.MethodInvocationException#ERROR_CODE
*/
public class DefaultBindingErrorProcessor implements BindingErrorProcessor {
Error code that a missing field error (i.e. a required field not
found in the list of property values) will be registered with:
"required".
/**
* Error code that a missing field error (i.e. a required field not
* found in the list of property values) will be registered with:
* "required".
*/
public static final String MISSING_FIELD_ERROR_CODE = "required";
@Override
public void processMissingFieldError(String missingField, BindingResult bindingResult) {
// Create field error with code "required".
String fixedField = bindingResult.getNestedPath() + missingField;
String[] codes = bindingResult.resolveMessageCodes(MISSING_FIELD_ERROR_CODE, missingField);
Object[] arguments = getArgumentsForBindError(bindingResult.getObjectName(), fixedField);
FieldError error = new FieldError(bindingResult.getObjectName(), fixedField, "", true,
codes, arguments, "Field '" + fixedField + "' is required");
bindingResult.addError(error);
}
@Override
public void processPropertyAccessException(PropertyAccessException ex, BindingResult bindingResult) {
// Create field error with the exceptions's code, e.g. "typeMismatch".
String field = ex.getPropertyName();
Assert.state(field != null, "No field in exception");
String[] codes = bindingResult.resolveMessageCodes(ex.getErrorCode(), field);
Object[] arguments = getArgumentsForBindError(bindingResult.getObjectName(), field);
Object rejectedValue = ex.getValue();
if (ObjectUtils.isArray(rejectedValue)) {
rejectedValue = StringUtils.arrayToCommaDelimitedString(ObjectUtils.toObjectArray(rejectedValue));
}
FieldError error = new FieldError(bindingResult.getObjectName(), field, rejectedValue, true,
codes, arguments, ex.getLocalizedMessage());
error.wrap(ex);
bindingResult.addError(error);
}
Return FieldError arguments for a binding error on the given field.
Invoked for each missing required field and each type mismatch.
The default implementation returns a single argument indicating the field name
(of type DefaultMessageSourceResolvable, with "objectName.field" and "field" as codes).
Params: - objectName – the name of the target object
- field – the field that caused the binding error
See Also: Returns: the Object array that represents the FieldError arguments
/**
* Return FieldError arguments for a binding error on the given field.
* Invoked for each missing required field and each type mismatch.
* <p>The default implementation returns a single argument indicating the field name
* (of type DefaultMessageSourceResolvable, with "objectName.field" and "field" as codes).
* @param objectName the name of the target object
* @param field the field that caused the binding error
* @return the Object array that represents the FieldError arguments
* @see org.springframework.validation.FieldError#getArguments
* @see org.springframework.context.support.DefaultMessageSourceResolvable
*/
protected Object[] getArgumentsForBindError(String objectName, String field) {
String[] codes = new String[] {objectName + Errors.NESTED_PATH_SEPARATOR + field, field};
return new Object[] {new DefaultMessageSourceResolvable(codes, field)};
}
}