121 lines
3.7 KiB
Java
121 lines
3.7 KiB
Java
package org.gcube.portlets.user.geoportaldataviewer.client.util;
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/**
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* The Class URLUtil.
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*
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* @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
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*
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* Nov 28, 2022
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*/
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public class URLUtil {
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/**
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* Gets the value of parameter.
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*
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* @param paramName the param name
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* @param url the url
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* @return the value of parameter
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*/
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public static String getValueOfParameter(String paramName, String url) {
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// logger.trace("finding: "+wmsParam +" into "+url);
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int index = url.toLowerCase().indexOf(paramName.toLowerCase() + "="); // ADDING CHAR "=" IN TAIL TO BE SECURE IT
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// IS A PARAMETER
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// logger.trace("start index of "+wmsParam+ " is: "+index);
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String value = "";
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if (index > -1) {
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int start = index + paramName.length() + 1; // add +1 for char '='
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String sub = url.substring(start, url.length());
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int indexOfSeparator = sub.indexOf("&");
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int end = indexOfSeparator != -1 ? indexOfSeparator : sub.length();
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value = sub.substring(0, end);
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} else
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return null;
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// logger.trace("return value: "+value);
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return value;
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}
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/**
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* Adds the parameter to query string.
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*
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* @param key the key
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* @param value the value
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* @param prefixAmpersand the prefix ampersand
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* @param suffixAmpersand the suffix ampersand
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* @return the string
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*/
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public static String addParameterToQueryString(String key, String value, boolean prefixAmpersand,
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boolean suffixAmpersand) {
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String queryParameter = "";
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if (prefixAmpersand)
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queryParameter += "&";
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queryParameter += key + "=" + value;
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if (suffixAmpersand)
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queryParameter += "&";
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return queryParameter;
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}
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/**
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* Sets the value of parameter.
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*
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* @param wmsParam the wms param
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* @param wmsLink the wms link
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* @param newValue the new value
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* @param addIfNotExists the add if not exists
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* @return the string
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*/
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public static String setValueOfParameter(String wmsParam, String wmsLink, String newValue, boolean addIfNotExists) {
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String toLowerWmsLink = wmsLink.toLowerCase();
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String toLowerWmsParam = wmsParam.toLowerCase();
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int index = toLowerWmsLink.indexOf(toLowerWmsParam + "="); // END WITH CHAR "=" TO BE SURE THAT IT IS A
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// PARAMETER
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if (index > -1) {
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int indexStartValue = index + toLowerWmsParam.length() + 1; // add +1 for char '='
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int indexOfSeparator = toLowerWmsLink.indexOf("&", indexStartValue); // GET THE FIRST "&" STARTING FROM
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// INDEX VALUE
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// logger.trace("indexOfSeparator index of "+wmsParam+ " is: "+indexOfSeparator);
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int indexEndValue = indexOfSeparator != -1 ? indexOfSeparator : toLowerWmsLink.length();
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// logger.trace("end: "+indexEndValue);
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return wmsLink.substring(0, indexStartValue) + newValue
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+ wmsLink.substring(indexEndValue, wmsLink.length());
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} else if (addIfNotExists) {
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wmsLink += "&" + wmsParam + "=" + newValue;
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}
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// logger.trace("return value: "+value);
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return wmsLink;
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}
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/**
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* Extract value of parameter from URL.
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*
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* @param paramName the param name
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* @param url the url
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* @return the string
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*/
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public static String extractValueOfParameterFromURL(String paramName, String url) {
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int index = url.toLowerCase().indexOf(paramName.toLowerCase() + "="); // ADDING CHAR "=" IN TAIL TO BE SURE THAT
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// IT
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// IS A PARAMETER
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String value = "";
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if (index > -1) {
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int start = index + paramName.length() + 1; // add +1 for char '='
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String sub = url.substring(start, url.length());
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int indexOfSeparator = sub.indexOf("&");
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int end = indexOfSeparator != -1 ? indexOfSeparator : sub.length();
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value = sub.substring(0, end);
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} else
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return null;
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return value;
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}
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}
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