fieldchecks.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * $Header: /sfroot/cvs/esimple/src/core/org/apache/struts/validator/FieldChecks.java,v 1.1.1.1 2004/09/08 06:38:45 lava Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/09/08 06:38:45 $
 *
 * ====================================================================
 *
 *  The Apache Software License, Version 1.1
 *
 *  Copyright (c) 1999-2003 The Apache Software Foundation.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 *  3. The end-user documentation included with the redistribution, if
 *  any, must include the following acknowlegement:
 *  "This product includes software developed by the
 *  Apache Software Foundation (http://www.apache.org/)."
 *  Alternately, this acknowlegement may appear in the software itself,
 *  if and wherever such third-party acknowlegements normally appear.
 *
 *  4. The names "The Jakarta Project", "Struts", and "Apache Software
 *  Foundation" must not be used to endorse or promote products derived
 *  from this software without prior written permission. For written
 *  permission, please contact [e-mail].
 *
 *  5. Products derived from this software may not be called "Apache"
 *  nor may "Apache" appear in their names without prior written
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 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of the Apache Software Foundation.  For more
 *  information on the Apache Software Foundation, please see
 *  <http://www.apache.org/>.
 */

package org.apache.struts.validator;

import java.io.Serializable;
import java.util.Date;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.validator.Field;
import org.apache.commons.validator.GenericTypeValidator;
import org.apache.commons.validator.GenericValidator;
import org.apache.commons.validator.ValidatorAction;
import org.apache.commons.validator.ValidatorUtil;
import org.apache.struts.action.ActionErrors;

/**
 * <p>
 * This class contains the default validations that are used in the 
 * validator-rules.xml file.
 * </p>
 * <p>
 * In general passing in a null or blank will return a null Object or a false
 * boolean. However, nulls and blanks do not result in an error being added to the
 * errors.
 * </p>
 * 
 * @author David Winterfeldt
 * @author James Turner
 * @author Rob Leland
 * @since Struts 1.1
 */
public class FieldChecks implements Serializable {

    /**
     *  Commons Logging instance.
     */
    private static final Log log = LogFactory.getLog(FieldChecks.class);

    public static final String FIELD_TEST_NULL = "NULL";
    public static final String FIELD_TEST_NOTNULL = "NOTNULL";
    public static final String FIELD_TEST_EQUAL = "EQUAL";

    /**
     * Checks if the field isn't null and length of the field is greater than zero not 
     * including whitespace.
     *
     * @param bean The bean validation is being performed on.
     * @param va The <code>ValidatorAction</code> that is currently being performed.
     * @param field The <code>Field</code> object associated with the current 
     * field being validated.
     * @param errors The <code>ActionErrors</code> object to add errors to if 
     * any validation errors occur.
     * @param request Current request object.
     * @return true if meets stated requirements, false otherwise.
     */
    public static boolean validateRequired(Object bean,
                                           ValidatorAction va, Field field,
                                           ActionErrors errors,
                                           HttpServletRequest request) {

        String value = null;
        if (isString(bean)) {
            value = (String) bean;
        } else {
            value = ValidatorUtil.getValueAsString(bean, field.getProperty());
        }
        
        if (GenericValidator.isBlankOrNull(value)) {
            errors.add(field.getKey(), Resources.getActionError(request, va, field));
            return false;
        } else {
            return true;
        }

    }

    /**
     * Checks if the field isn't null based on the values of other fields.
     *
     * @param bean The bean validation is being performed on.
     * @param va The <code>ValidatorAction</code> that is currently being 
     * performed.
     * @param field The <code>Field</code> object associated with the current 
     * field being validated.
     * @param errors The <code>ActionErrors</code> object to add errors to if 
     * any validation errors occur.
     * @param validator The <code>Validator</code> instance, used to access 
     * other field values.
     * @param request Current request object.
     * @return true if meets stated requirements, false otherwise.
     */
    public static boolean validateRequiredIf(Object bean,
                                             ValidatorAction va, Field field,
                                             ActionErrors errors,
                                             org.apache.commons.validator.Validator validator,
                                             HttpServletRequest request) {
                                                 
        Object form = validator.getResource(org.apache.commons.validator.Validator.BEAN_KEY);
        String value = null;
        boolean required = false;
        
        if (isString(bean)) {
            value = (String) bean;
        } else {
            value = ValidatorUtil.getValueAsString(bean, field.getProperty());
        }
        
        int i = 0;
        String fieldJoin = "AND";
        if (!GenericValidator.isBlankOrNull(field.getVarValue("fieldJoin"))) {
            fieldJoin = field.getVarValue("fieldJoin");
        }
        
        if (fieldJoin.equalsIgnoreCase("AND")) {
            required = true;
        }
        
        while (!GenericValidator.isBlankOrNull(field.getVarValue("field[" + i + "]"))) {
            String dependProp = field.getVarValue("field[" + i + "]");
            String dependTest = field.getVarValue("fieldTest[" + i + "]");
            String dependTestValue = field.getVarValue("fieldValue[" + i + "]");
            String dependIndexed = field.getVarValue("fieldIndexed[" + i + "]");
            
            if (dependIndexed == null) {
                dependIndexed = "false";
            }
            
            String dependVal = null;
            boolean thisRequired = false;
            if (field.isIndexed() && dependIndexed.equalsIgnoreCase("true")) {
                String key = field.getKey();
                if ((key.indexOf("[") > -1) && (key.indexOf("]") > -1)) {
                    String ind = key.substring(0, key.indexOf(".") + 1);
                    dependProp = ind + dependProp;
                }
            }
            
            dependVal = ValidatorUtil.getValueAsString(form, dependProp);
            if (dependTest.equals(FIELD_TEST_NULL)) {
                if ((dependVal != null) && (dependVal.length() > 0)) {
                    thisRequired = false;
                } else {
                    thisRequired = true;
                }
            }
            
            if (dependTest.equals(FIELD_TEST_NOTNULL)) {
                if ((dependVal != null) && (dependVal.length() > 0)) {
                    thisRequired = true;
                } else {
                    thisRequired = false;
                }
            }
            
            if (dependTest.equals(FIELD_TEST_EQUAL)) {
                thisRequired = dependTestValue.equalsIgnoreCase(dependVal);
            }
            
            if (fieldJoin.equalsIgnoreCase("AND")) {
                required = required && thisRequired;
            } else {
                required = required || thisRequired;
            }
            
            i++;
        }
        
		if (required) {
			if (GenericValidator.isBlankOrNull(value)) {
				errors.add(
					field.getKey(),
					Resources.getActionError(request, va, field));
				
                return false;

			} else {
				return true;
			}
		}
        return true;
    }

    /**
     * Checks if the field matches the regular expression in the field's mask attribute.
     *
     * @param bean The bean validation is being performed on.
     * @param va The <code>ValidatorAction</code> that is currently being 
     * performed.
     * @param field The <code>Field</code> object associated with the current 
     * field being validated.
     * @param errors   The <code>ActionErrors</code> object to add errors to if 
     * any validation errors occur.
     * @param request Current request object.
     * @return true if field matches mask, false otherwise.
     */
    public static boolean validateMask(Object bean,
                                       ValidatorAction va, Field field,
                                       ActionErrors errors,
                                       HttpServletRequest request) {

        String mask = field.getVarValue("mask");
        String value = null;
        if (isString(bean)) {
            value = (String) bean;
        } else {
            value = ValidatorUtil.getValueAsString(bean, field.getProperty());
        }
        
        try {
            if (!GenericValidator.isBlankOrNull(value)
                && !GenericValidator.matchRegexp(value, mask)) {
                    
                errors.add(
                    field.getKey(),
                    Resources.getActionError(request, va, field));

                return false;
            } else {
                return true;
            }
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        }
        return true;
    }


    /**
     * Checks if the field can safely be converted to a byte primitive.
     *
     *@param bean The bean validation is being performed on.
     *@param va The <code>ValidatorAction</code> that is currently being performed.
     *@param field The <code>Field</code> object associated with the current 
     *field being validated.
     *@param errors The <code>ActionErrors</code> object to add errors to if