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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.core;
import java.io.File;
import java.io.IOException;
/**
* @author Simon Thoresen Hult
*/
class BundleLocationResolver {
static final String BUNDLE_PATH = System.getProperty("jdisc.bundle.path", ".") + "/";
public static String resolve(String bundleLocation) {
bundleLocation = expandSystemProperties(bundleLocation);
bundleLocation = bundleLocation.trim();
String scheme = getLocationScheme(bundleLocation);
if (scheme == null) {
bundleLocation = "file:" + getCanonicalPath(BUNDLE_PATH + bundleLocation);
} else if (scheme.equalsIgnoreCase("file")) {
bundleLocation = "file:" + getCanonicalPath(bundleLocation.substring(5));
}
return bundleLocation;
}
private static String expandSystemProperties(String str) {
StringBuilder ret = new StringBuilder();
int prev = 0;
while (true) {
int from = str.indexOf("${", prev);
if (from < 0) {
break;
}
ret.append(str.substring(prev, from));
prev = from;
int to = str.indexOf("}", from);
if (to < 0) {
break;
}
ret.append(System.getProperty(str.substring(from + 2, to), ""));
prev = to + 1;
}
if (prev >= 0) {
ret.append(str.substring(prev));
}
return ret.toString();
}
private static String getCanonicalPath(String path) {
try {
return new File(path).getCanonicalPath();
} catch (IOException e) {
return path;
}
}
private static String getLocationScheme(String bundleLocation) {
char[] arr = bundleLocation.toCharArray();
for (int i = 0; i < arr.length; ++i) {
if (arr[i] == ':' && i > 0) {
return bundleLocation.substring(0, i);
}
if (!Character.isLetterOrDigit(arr[i])) {
return null;
}
}
return null;
}
}
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