UriTemplateUtils.java
/*
* Copyright (c) 2022, WSO2 LLC (http://www.wso2.com).
*
* WSO2 LLC licenses this file to you under the Apache 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.apache.org/licenses/LICENSE-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.apache.synapse.util;
import com.damnhandy.uri.template.UriTemplate;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;
/**
* Utility class with URI Template helper methods.
*/
public class UriTemplateUtils {
private static final Log log = LogFactory.getLog(UriTemplateUtils.class);
private UriTemplateUtils() {
}
/**
* Returns evaluated URI for a given URI template.
* @param variables variable map with {uri.var}
* @param template URI template
* @return evaluated URI string
* @throws URISyntaxException given string cannot be parsed as a URI
*/
public static String getUriString(Map<String, Object> variables, UriTemplate template) throws URISyntaxException {
String evaluatedUri;
String uriTemplateString;
// Handles special cases similar to uri-template="{uri.var.variable}"
if (template.getTemplate().charAt(0) == '{' && template.getTemplate().charAt(1) != '+') {
uriTemplateString = "{+" + template.getTemplate().substring(1);
template = UriTemplate.fromTemplate(uriTemplateString);
}
template.set(variables);
if (variables.isEmpty()) {
evaluatedUri = template.getTemplate();
} else {
URI uri = new URI(template.expand());
evaluatedUri = uri.toString();
if (log.isDebugEnabled()) {
log.debug("Expanded URL : " + evaluatedUri);
}
}
return evaluatedUri;
}
}