org.apache.openejb.util.URISupport Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.openejb.util;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Swiped verbatim from ActiveMQ... the URI kings.
*
* URI relativize(URI, URI) added afterwards to deal with the
* non-functional URI.relativize(URI) method
*/
public class URISupport {
/**
* URI absoluteA = new URI("/Users/dblevins/work/openejb3/container/openejb-jee/apple/");
* URI absoluteB = new URI("/Users/dblevins/work/openejb3/container/openejb-core/foo.jar");
*
* URI relativeB = URISupport.relativize(absoluteA, absoluteB);
*
* assertEquals("../../openejb-core/foo.jar", relativeB.toString());
*
* URI resolvedB = absoluteA.resolve(relativeB);
* assertTrue(resolvedB.equals(absoluteB));
*
* @param a
* @param b
* @return relative b
*/
public static URI relativize(final URI a, URI b) {
if (a == null || b == null) {
return b;
}
if (!a.isAbsolute() && b.isAbsolute()) {
return b;
}
if (!b.isAbsolute()) {
b = a.resolve(b);
}
final List pathA = Arrays.asList(a.getPath().split("/"));
final List pathB = Arrays.asList(b.getPath().split("/"));
final int limit = Math.min(pathA.size(), pathB.size());
int lastMatch = 0;
while (lastMatch < limit) {
final String aa = pathA.get(lastMatch);
final String bb = pathB.get(lastMatch);
if (aa.equals(bb)) {
lastMatch++;
} else {
break;
}
}
final List path = new ArrayList<>();
for (int x = pathA.size() - lastMatch; x > 0; x--) {
path.add("..");
}
final List remaining = pathB.subList(lastMatch, pathB.size());
path.addAll(remaining);
try {
return new URI(null, null, Join.join("/", path), b.getQuery(), b.getFragment());
} catch (final URISyntaxException e) {
throw new IllegalArgumentException(e);
}
}
public static class CompositeData {
String scheme;
String path;
URI[] components;
Map parameters;
String fragment;
public String host;
public URI[] getComponents() {
return components;
}
public String getFragment() {
return fragment;
}
public Map getParameters() {
return parameters;
}
public String getScheme() {
return scheme;
}
public String getPath() {
return path;
}
public String getHost() {
return host;
}
public URI toURI() throws URISyntaxException {
final StringBuilder sb = new StringBuilder();
if (scheme != null) {
sb.append(scheme);
sb.append(':');
}
if (host != null && host.length() != 0) {
sb.append(host);
} else {
sb.append('(');
for (int i = 0; i < components.length; i++) {
if (i != 0) {
sb.append(',');
}
sb.append(components[i].toString());
}
sb.append(')');
}
if (path != null) {
sb.append('/');
sb.append(path);
}
if (!parameters.isEmpty()) {
sb.append("?");
sb.append(createQueryString(parameters));
}
if (fragment != null) {
sb.append("#");
sb.append(fragment);
}
return URLs.uri(sb.toString());
}
}
public static Map parseQuery(final String uri) throws URISyntaxException {
try {
final Map rc = new LinkedHashMap<>();
if (uri != null) {
final String[] parameters = uri.split("&");
for (String parameter : parameters) {
final int p = parameter.indexOf('=');
if (p >= 0) {
final String name = URLDecoder.decode(parameter.substring(0, p), "UTF-8");
final String value = URLDecoder.decode(parameter.substring(p + 1), "UTF-8");
rc.put(name, value);
} else {
rc.put(parameter, null);
}
}
}
return rc;
} catch (final UnsupportedEncodingException e) {
throw (URISyntaxException) new URISyntaxException(e.toString(), "Invalid encoding").initCause(e);
}
}
public static Map parseParamters(final URI uri) throws URISyntaxException {
return uri.getQuery() == null ? Collections.EMPTY_MAP : parseQuery(stripPrefix(uri.getQuery(), "?"));
}
/**
* Removes any URI query from the given uri
*/
public static URI removeQuery(final URI uri) throws URISyntaxException {
return createURIWithQuery(uri, null);
}
/**
* Creates a URI with the given query
*/
public static URI createURIWithQuery(final URI uri, final String query) throws URISyntaxException {
return new URI(uri.getScheme(), uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(), query, uri.getFragment());
}
public static CompositeData parseComposite(final URI uri) throws URISyntaxException {
final CompositeData rc = new CompositeData();
rc.scheme = uri.getScheme();
final String ssp = stripPrefix(uri.getSchemeSpecificPart().trim(), "//").trim();
parseComposite(uri, rc, ssp);
rc.fragment = uri.getFragment();
return rc;
}
private static void parseComposite(final URI uri, final CompositeData rc, final String ssp) throws URISyntaxException {
final String componentString;
final String params;
if (!checkParenthesis(ssp)) {
throw new URISyntaxException(uri.toString(), "Not a matching number of '(' and ')' parenthesis");
}
int p;
final int intialParen = ssp.indexOf('(');
if (intialParen == 0) {
rc.host = ssp.substring(0, intialParen);
p = rc.host.indexOf('/');
if (p >= 0) {
rc.path = rc.host.substring(p);
rc.host = rc.host.substring(0, p);
}
p = ssp.lastIndexOf(')');
componentString = ssp.substring(intialParen + 1, p);
params = ssp.substring(p + 1).trim();
} else {
componentString = ssp;
params = "";
}
final String[] components = splitComponents(componentString);
rc.components = new URI[components.length];
for (int i = 0; i < components.length; i++) {
rc.components[i] = new URI(components[i].trim());
}
p = params.indexOf('?');
if (p >= 0) {
if (p > 0) {
rc.path = stripPrefix(params.substring(0, p), "/");
}
rc.parameters = parseQuery(params.substring(p + 1));
} else {
if (params.length() > 0) {
rc.path = stripPrefix(params, "/");
}
rc.parameters = new LinkedHashMap();
}
}
private static String[] splitComponents(final String str) {
final ArrayList l = new ArrayList<>();
int last = 0;
int depth = 0;
final char[] chars = str.toCharArray();
for (int i = 0; i < chars.length; i++) {
switch (chars[i]) {
case '(':
depth++;
break;
case ')':
depth--;
break;
case ',':
if (depth == 0) {
final String s = str.substring(last, i);
l.add(s);
last = i + 1;
}
}
}
final String s = str.substring(last);
if (s.length() != 0) {
l.add(s);
}
final String[] rc = new String[l.size()];
l.toArray(rc);
return rc;
}
public static String stripPrefix(final String value, final String prefix) {
if (value.startsWith(prefix)) {
return value.substring(prefix.length());
}
return value;
}
public static URI stripScheme(final URI uri) throws URISyntaxException {
return URLs.uri(stripPrefix(uri.getRawSchemeSpecificPart().trim(), "//"));
}
public static String createQueryString(final Map options) throws URISyntaxException {
try {
if (options.size() > 0) {
final StringBuilder rc = new StringBuilder();
boolean first = true;
for (Object o : options.keySet()) {
if (first) {
first = false;
} else {
rc.append("&");
}
final String key = (String) o;
final String value = (String) options.get(key);
rc.append(URLEncoder.encode(key, "UTF-8"));
rc.append("=");
rc.append(URLEncoder.encode(value, "UTF-8"));
}
return rc.toString();
} else {
return "";
}
} catch (final UnsupportedEncodingException e) {
throw (URISyntaxException) new URISyntaxException(e.toString(), "Invalid encoding").initCause(e);
}
}
/**
* Creates a URI from the original URI and the remaining paramaters
*
* @throws URISyntaxException
*/
public static URI createRemainingURI(final URI originalURI, final Map params) throws URISyntaxException {
String s = createQueryString(params);
if (s.length() == 0) {
s = null;
}
return createURIWithQuery(originalURI, s);
}
public static URI changeScheme(final URI bindAddr, final String scheme) throws URISyntaxException {
return new URI(scheme, bindAddr.getUserInfo(), bindAddr.getHost(), bindAddr.getPort(), bindAddr.getPath(), bindAddr.getQuery(), bindAddr.getFragment());
}
public static boolean checkParenthesis(final String str) {
boolean result = true;
if (str != null) {
int open = 0;
int closed = 0;
int i = 0;
while ((i = str.indexOf('(', i)) >= 0) {
i++;
open++;
}
i = 0;
while ((i = str.indexOf(')', i)) >= 0) {
i++;
closed++;
}
result = open == closed;
}
return result;
}
public int indexOfParenthesisMatch(final String str) {
final int result = -1;
return result;
}
/**
* This method adds new parameters to a URI. Any parameters provided that already exist in the URI will *not* be replaced.
* @param uri The URI to add parameters to
* @param newParameters The parameters to add
* @return The URI with the new parameters added
* @throws URISyntaxException If there is a syntax error with the provided URI.
*/
public static URI addParameters(final URI uri, final Map newParameters) throws URISyntaxException {
if (newParameters == null || newParameters.size() == 0) {
return uri;
}
final Map parameters = new HashMap<>(parseParamters(uri));
final Set keys = newParameters.keySet();
for (final String key : keys) {
if (! parameters.containsKey(key)) {
parameters.put(key, newParameters.get(key));
}
}
return createRemainingURI(uri, parameters);
}
}
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