DefaultBindingErrorProcessor.java :  » J2EE » spring-framework-3.0.0 » org » springframework » validation » Java Open Source

Java Open Source » J2EE » spring framework 3.0.0 
spring framework 3.0.0 » org » springframework » validation » DefaultBindingErrorProcessor.java
/*
 * Copyright 2002-2009 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.validation;

import org.springframework.beans.PropertyAccessException;
import org.springframework.context.support.DefaultMessageSourceResolvable;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

/**
 * 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</code> for each <code>PropertyAccessException</code>
 * given, using the <code>PropertyAccessException</code>'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".
   */
  public static final String MISSING_FIELD_ERROR_CODE = "required";


  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);
    bindingResult.addError(new FieldError(
        bindingResult.getObjectName(), fixedField, "", true,
        codes, arguments, "Field '" + fixedField + "' is required"));
  }

  public void processPropertyAccessException(PropertyAccessException ex, BindingResult bindingResult) {
    // Create field error with the exceptions's code, e.g. "typeMismatch".
    String field = ex.getPropertyName();
    String[] codes = bindingResult.resolveMessageCodes(ex.getErrorCode(), field);
    Object[] arguments = getArgumentsForBindError(bindingResult.getObjectName(), field);
    Object rejectedValue = ex.getValue();
    if (rejectedValue != null && rejectedValue.getClass().isArray()) {
      rejectedValue = StringUtils.arrayToCommaDelimitedString(ObjectUtils.toObjectArray(rejectedValue));
    }
    bindingResult.addError(new FieldError(
        bindingResult.getObjectName(), field, rejectedValue, true,
        codes, arguments, ex.getLocalizedMessage()));
  }

  /**
   * 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 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)};
  }

}
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.