org.openmrs.module.metadatasharing.model.validator.UrlValidator.java Source code

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Here is the source code for org.openmrs.module.metadatasharing.model.validator.UrlValidator.java

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.module.metadatasharing.model.validator;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Iterator;
import java.util.Set;

import org.openmrs.module.metadatasharing.MetadataSharingConsts;
import org.openmrs.module.metadatasharing.downloader.DownloaderFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;

/**
 * Validates subscription URL
 * 
 * @see Subscription
 */
@Component(MetadataSharingConsts.MODULE_ID + ".UrlValidator")
public class UrlValidator implements Validator {

    /**
     * The maximum length of the URL
     */
    private int maxLength = 512;

    @Autowired
    private DownloaderFactory downloaderFactory = null;

    /**
     * @see org.springframework.validation.Validator#supports(java.lang.Class)
     */
    @SuppressWarnings("rawtypes")
    @Override
    public boolean supports(Class clazz) {
        return String.class.isAssignableFrom(clazz);
    }

    /**
     * @see org.springframework.validation.Validator#validate(java.lang.Object,
     *      org.springframework.validation.Errors)
     * @should reject value if the length is greater than maxLength
     * @should reject non available protocols
     * @should not reject available protocols
     */
    @Override
    public void validate(Object target, Errors errors) {
        if (((String) target).length() > maxLength) {
            errors.reject("metadatasharing.error.subscription.url.tooLong", new Integer[] { maxLength }, null);
        }
        try {
            URL url = new URL((String) target);
            Set<String> protocols = downloaderFactory.getAvailableProtocols();
            if (!protocols.contains(url.getProtocol())) { //let's provide information about avilable protocols
                String message = "";
                Iterator<String> it = protocols.iterator();
                while (it.hasNext()) {
                    message += it.next();
                    if (it.hasNext())
                        message += ", ";
                }
                errors.reject("metadatasharing.error.subscription.url.unsupported", new Object[] { message }, null);
            }
        } catch (MalformedURLException e) {
            errors.reject("metadatasharing.error.subscription.url.invalid");
        }
    }

    /**
     * @param maxLength the maxLength to set
     */
    public void setMaxLength(int maxLength) {
        this.maxLength = maxLength;
    }

    /**
     * @return the maxLength
     */
    public int getMaxLength() {
        return maxLength;
    }
}