org.theospi.utils.mvc.impl.SimpleValidator.java Source code

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Here is the source code for org.theospi.utils.mvc.impl.SimpleValidator.java

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/**********************************************************************************
* $URL:https://source.sakaiproject.org/svn/osp/trunk/common/tool-lib/src/java/org/theospi/utils/mvc/impl/SimpleValidator.java $
* $Id:SimpleValidator.java 9134 2006-05-08 20:28:42Z chmaurer@iupui.edu $
***********************************************************************************
*
 * Copyright (c) 2005, 2006, 2008 The Sakai Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.theospi.utils.mvc.impl;

import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.theospi.portfolio.shared.model.OspException;

public class SimpleValidator extends ValidatorBase implements Validator {
    protected final transient Log logger = LogFactory.getLog(getClass());

    private List requiredFields;
    private String messageCode = "Required";

    /**
     * Return whether or not this object can validate objects
     * of the given class.
     */
    public boolean supports(Class clazz) {
        return true;
    }

    /**
     * Validate an object, which must be of a class for which
     * the supports() method returned true.
     *
     * @param obj    Populated object to validate
     * @param errors Errors object we're building. May contain
     *               errors for this field relating to types.
     */
    public void validate(Object obj, Errors errors) {
        for (Iterator i = requiredFields.iterator(); i.hasNext();) {
            String field = (String) i.next();
            validate(field, obj, errors);
        }
    }

    protected void validate(String field, Object obj, Errors errors) {
        if (obj instanceof Map) {
            Map map = (Map) obj;
            if (map.get(field) == null) {
                errors.rejectValue(field, messageCode, messageCode);
            }
        } else {
            PropertyDescriptor prop = null;
            try {
                prop = new PropertyDescriptor(field, obj.getClass());

                Object value = prop.getReadMethod().invoke(obj, new Object[] {});
                if (value == null || value.toString().length() == 0) {
                    errors.rejectValue(field, messageCode, messageCode);
                }
            } catch (IntrospectionException e) {
                logger.error("", e);
                throw new OspException(e);
            } catch (IllegalAccessException e) {
                logger.error("", e);
                throw new OspException(e);
            } catch (InvocationTargetException e) {
                logger.error("", e);
                throw new OspException(e);
            }
        }
    }

    public String getMessageCode() {
        return messageCode;
    }

    public void setMessageCode(String messageCode) {
        this.messageCode = messageCode;
    }

    public List getRequiredFields() {
        return requiredFields;
    }

    public void setRequiredFields(List requiredFields) {
        this.requiredFields = requiredFields;
    }
}