com.cyclopsgroup.waterview.web.taglib.BaseValidatorTag.java Source code

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Here is the source code for com.cyclopsgroup.waterview.web.taglib.BaseValidatorTag.java

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/*
 * Copyright (c) 1999-2004 Evavi, Inc. All Rights Reserved.
 *
 * This software is the proprietary information of Evavi, Inc.
 * Use is subject to license terms. License Agreement available at
 * <a href="http://www.evavi.com" target="_blank">www.evavi.com</a>
 */
package com.cyclopsgroup.waterview.web.taglib;

import org.apache.commons.jelly.JellyTagException;
import org.apache.commons.jelly.XMLOutput;

import com.cyclopsgroup.waterview.spi.taglib.TagSupport;
import com.cyclopsgroup.waterview.web.FieldValidator;

/**
 * @author <a href="mailto:jiaqi.guo@gmail.com">Jiaqi Guo</a>
 * 
 * Base validator tag
 */
public abstract class BaseValidatorTag extends TagSupport {

    /**
     * Create validator
     *
     * @return Validator instance
     * @throws Exception Throw it out
     */
    protected abstract FieldValidator createValidator() throws Exception;

    /**
     * Overwrite or implement method processTag()
     *
     * @see com.cyclopsgroup.waterview.utils.TagSupportBase#processTag(org.apache.commons.jelly.XMLOutput)
     */
    protected void processTag(XMLOutput output) throws Exception {
        FieldValidator validator = createValidator();
        if (getParent() instanceof FieldTag) {
            ((FieldTag) getParent()).getField().setValidator(validator);
        } else if (getParent() instanceof ValidatorsTag) {
            ((ValidatorsTag) getParent()).addValidator(validator);
        } else {
            throw new JellyTagException("Parent tag must be Field or Validators");
        }
    }
}