115 lines
2.9 KiB
Java
115 lines
2.9 KiB
Java
package org.gcube.datacatalogue.ckanutillibrary.server.utils;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Some utility methods used within the library.
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* @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
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*/
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public class UtilMethods {
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private static final Logger logger = LoggerFactory.getLogger(UtilMethods.class);
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private final static String HTTPS = "https";
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private final static String HTTP = "http";
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/**
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* Ckan username has _ instead of . (that is, costantino.perciante -> costantino_perciante)
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* @param owner
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* @return
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*/
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public static String fromUsernameToCKanUsername(String username){
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if(username == null)
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return null;
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return username.trim().replaceAll("\\.", "_");
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}
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/**
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* Liferay username has . instead of _ (that is, costantino_perciante -> costantino.perciante)
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* @param owner
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* @return
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*/
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public static String fromCKanUsernameToUsername(String ckanUsername){
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if(ckanUsername == null)
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return null;
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return ckanUsername.trim().replaceAll("_", ".");
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}
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/**
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* Generate the catalogue's dataset name from its title
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* @param title
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* @return
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*/
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public static String fromProductTitleToName(String title) {
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if(title == null)
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return null;
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String regexTitleNameTransform = "[^A-Za-z0-9_-]";
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return title.trim().replaceAll(regexTitleNameTransform, "_").replaceAll("_+", "_").toLowerCase();
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}
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/**
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* Convert a display group name to group id
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* @param groupName
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* @return
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*/
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public static String fromGroupTitleToName(String groupName){
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if(groupName == null)
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return null;
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String regexGroupNameTransform = "[^A-Za-z0-9-]";
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String modified = groupName.trim().replaceAll(regexGroupNameTransform, "-").replaceAll("-+", "-").toLowerCase();
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if(modified.startsWith("-"))
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modified = modified.substring(1);
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if(modified.endsWith("-"))
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modified = modified.substring(0, modified.length() -1);
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return modified;
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}
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/**
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* Utility method to check if a something at this url actually exists
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* @param URLName
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* @return
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*/
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public static boolean resourceExists(String URLName){
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if(URLName == null || URLName.isEmpty())
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return false;
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try {
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// replace https
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String urlToTest = URLName.replace(HTTPS, HTTP);
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HttpURLConnection.setFollowRedirects(true);
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HttpURLConnection con = (HttpURLConnection) new URL(urlToTest).openConnection();
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con.setRequestMethod("HEAD");
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logger.debug("Return code is " + con.getResponseCode());
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return (con.getResponseCode() == HttpURLConnection.HTTP_OK);
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}
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catch (Exception e) {
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logger.error("Exception while checking url", e);
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return false;
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}
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}
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/**
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* Builds a string made of key + scope
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* @param key
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* @param scope
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* @return
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*/
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public static String concatenateSessionKeyScope(String key, String scope){
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if(key == null || scope == null)
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throw new IllegalArgumentException("Key or scope null");
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return key.concat(scope);
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}
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}
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