/*
* Copyright 2017 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed 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.keycloak.theme;
import java.util.Properties;
/**
* @author <a href="mailto:mstrukel@redhat.com">Marko Strukelj</a>
*/
public class TemplatingUtil {
public static String resolveVariables(String text, Properties props) {
return resolveVariables(text, props, "${", "}");
}
public static String resolveVariables(String text, Properties props, String startMarker, String endMarker) {
int e = 0;
int s = text.indexOf(startMarker);
if (s == -1) {
return text;
} else {
StringBuilder sb = new StringBuilder();
do {
if (e < s) {
sb.append(text.substring(e, s));
}
e = text.indexOf(endMarker, s + startMarker.length());
if (e != -1) {
String key = text.substring(s + startMarker.length(), e);
sb.append(props.getProperty(key, key));
e += endMarker.length();
s = text.indexOf(startMarker, e);
} else {
e = s;
break;
}
} while (s != -1);
if (e < text.length()) {
sb.append(text.substring(e));
}
return sb.toString();
}
}
}