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Links.java
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/*-
* #%L
* URL scheme handlers for SciJava.
* %%
* Copyright (C) 2023 - 2025 SciJava developers.
* %%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* #L%
*/
package org.scijava.links;
import java.net.URI;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Utility class for working with {@link URI} objects.
*
* @author Curtis Rueden
*/
public final class Links {
private Links() {
// NB: Prevent instantiation of utility class.
}
public static String path(final URI uri) {
final String path = uri.getPath();
if (path == null) return null;
return path.startsWith("/") ? path.substring(1) : path;
}
public static String operation(final URI uri) {
final String path = path(uri);
if (path == null) return null;
final int slash = path.indexOf("/");
return slash < 0 ? path : path.substring(0, slash);
}
public static String[] pathFragments(final URI uri) {
final String path = path(uri);
if (path == null) return null;
return path.isEmpty() ? new String[0] : path.split("/");
}
public static String subPath(final URI uri) {
final String path = path(uri);
if (path == null) return null;
final int slash = path.indexOf("/");
return slash < 0 ? "" : path.substring(slash + 1);
}
public static Map<String, String> query(final URI uri) {
final LinkedHashMap<String, String> map = new LinkedHashMap<>();
final String query = uri.getQuery();
final String[] tokens = query == null ? new String[0] : query.split("&");
for (final String token : tokens) {
final String[] kv = token.split("=", 2);
final String k = kv[0];
final String v = kv.length > 1 ? kv[1] : null;
map.put(k, v);
}
return map;
}
}