com.sun.faces.context.UrlBuilder Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces-api Show documentation
Show all versions of jakarta.faces-api Show documentation
Jakarta Faces defines an MVC framework for building user interfaces for web applications,
including UI components, state management, event handing, input validation, page navigation, and
support for internationalization and accessibility.
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.context;
import com.sun.faces.util.Util;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.faces.context.FacesContext;
import javax.faces.lifecycle.ClientWindow;
import javax.faces.render.ResponseStateManager;
/**
* The UrlBuilder provides a convenient way to assemble a URL. It
* follows the standard Builder Pattern. A seed URL is provided, which is broken
* into parts to allow for dynamic assembly. When the URL is to be build, a call
* to createUrl() assembles the parts into a relative URL. This class should
* be extended if the developer wishes to have it deal with absolute URLs.
*
* Note that this class is optimized to parse the query string lazily so as
* to avoid unnecessary work if the seed URL differs little from the URL to be
* built.
*/
class UrlBuilder {
public static final String QUERY_STRING_SEPARATOR = "?";
public static final String PARAMETER_PAIR_SEPARATOR = "&";
public static final String PARAMETER_NAME_VALUE_SEPARATOR = "=";
public static final String FRAGMENT_SEPARATOR = "#";
public static final String DEFAULT_ENCODING = "UTF-8";
private static final List NULL_LIST = Arrays.asList((String) null);
private StringBuilder url;
private String path;
private String queryString;
private String fragment;
private Map> parameters;
private String encoding;
// ------------------------------------------------------------ Constructors
public UrlBuilder(String url, String encoding) {
if (url == null || url.trim().length() == 0) {
throw new IllegalArgumentException("Url cannot be empty");
}
this.url = new StringBuilder(url.length() * 2);
extractSegments(url);
this.encoding = encoding;
// PERF TL lookup per-instance
}
public UrlBuilder(String url) {
this(url, DEFAULT_ENCODING);
}
// ---------------------------------------------------------- Public Methods
public UrlBuilder addParameters(String name, List values) {
if (name == null || name.trim().length() == 0) {
throw new IllegalArgumentException("Parameter name cannot be empty");
}
addValuesToParameter(name.trim(), values, true);
return this;
}
public UrlBuilder addParameters(Map> params) {
if (params != null && !params.isEmpty()) {
for (Map.Entry> entry : params.entrySet()) {
if (entry.getKey() == null || entry.getKey().trim().length() == 0) {
throw new IllegalArgumentException("Parameter name cannot be empty");
}
List values = entry.getValue();
List retValues = values;
addValuesToParameter(entry.getKey().trim(), retValues, true);
}
}
return this;
}
public UrlBuilder setPath(String path) {
if (path == null || path.trim().length() == 0) {
throw new IllegalArgumentException("Path cannot be empty");
}
this.path = path;
return this;
}
/**
* Setting a query string consecutively will replace all but the last one. Otherwise,
* the name/value pairs in the query string contribute to the parameters already established.
*/
public UrlBuilder setQueryString(String queryString) {
this.queryString = queryString;
cleanQueryString();
return this;
}
/**
* The fragment is appended at the end of the url after a hash mark. It represents
* the fragement of the document that should be brought into focus when the document
* is rendered. Setting the fragment replaces the previous value.
*/
public UrlBuilder setFragment(String fragment) {
this.fragment = fragment;
cleanFragment();
return this;
}
public String createUrl() {
appendPath();
appendQueryString();
appendFragment();
return url.toString();
}
// ------------------------------------------------------- Protected Methods
protected String getPath() {
return path;
}
protected Map> getParameters() {
parseQueryString();
return parameters;
}
protected void parseQueryString() {
if (parameters == null) {
parameters = new LinkedHashMap<>();
}
// if query string is null, then it has been parsed into parameters
if (queryString == null) {
return;
}
Map appMap = FacesContext.getCurrentInstance().getExternalContext().getApplicationMap();
String[] pairs = Util.split(appMap, queryString, PARAMETER_PAIR_SEPARATOR);
for (String pair : pairs) {
String[] nameAndValue = Util.split(appMap, pair, PARAMETER_NAME_VALUE_SEPARATOR);
// ignore malformed pair
if (nameAndValue.length != 2
|| nameAndValue[0].trim().length() == 0) {
continue;
}
addValueToParameter(nameAndValue[0], nameAndValue[1], false);
}
queryString = null;
}
protected void appendPath() {
url.append(path);
}
protected void appendQueryString() {
boolean hasQueryString = false;
if (parameters != null) {
String nextSeparatorChar;
if ( queryString == null ) {
nextSeparatorChar = QUERY_STRING_SEPARATOR;
} else {
nextSeparatorChar = PARAMETER_PAIR_SEPARATOR;
url.append(QUERY_STRING_SEPARATOR).append(queryString);
}
for (Map.Entry> param : parameters.entrySet()) {
for (String value : param.getValue()) {
url.append(nextSeparatorChar);
url.append(param.getKey());
url.append(PARAMETER_NAME_VALUE_SEPARATOR);
url.append(value);
nextSeparatorChar = PARAMETER_PAIR_SEPARATOR;
}
}
hasQueryString = true;
} else if (queryString != null) {
url.append(QUERY_STRING_SEPARATOR).append(queryString);
hasQueryString = true;
}
FacesContext context = FacesContext.getCurrentInstance();
ClientWindow cw = context.getExternalContext().getClientWindow();
boolean appendClientWindow = false;
if (null != cw) {
appendClientWindow = cw.isClientWindowRenderModeEnabled(context);
}
if (appendClientWindow && -1 == url.indexOf(ResponseStateManager.CLIENT_WINDOW_URL_PARAM)) {
if (null != cw) {
String clientWindow = cw.getId();
if (!hasQueryString) {
url.append(QUERY_STRING_SEPARATOR);
} else {
url.append(PARAMETER_PAIR_SEPARATOR);
}
url.append(ResponseStateManager.CLIENT_WINDOW_URL_PARAM).append(PARAMETER_NAME_VALUE_SEPARATOR).append(clientWindow);
Map additionalParams = cw.getQueryURLParameters(context);
if (null != additionalParams) {
for (Map.Entry cur : additionalParams.entrySet()) {
url.append(PARAMETER_NAME_VALUE_SEPARATOR);
url.append(cur.getKey()).
append(UrlBuilder.PARAMETER_NAME_VALUE_SEPARATOR).
append(cur.getValue());
}
}
}
}
}
protected void appendFragment() {
if (fragment != null) {
url.append(FRAGMENT_SEPARATOR).append(fragment);
}
}
protected void extractSegments(String url) {
int fragmentIndex = url.indexOf(FRAGMENT_SEPARATOR);
if (fragmentIndex != -1) {
fragment = url.substring(fragmentIndex + 1);
cleanFragment();
url = url.substring(0, fragmentIndex);
}
int queryStringIndex = url.indexOf(QUERY_STRING_SEPARATOR);
if (queryStringIndex != -1) {
queryString = url.substring(queryStringIndex + 1);
cleanQueryString();
path = url.substring(0, queryStringIndex);
}
else {
path = url;
}
}
protected void addValueToParameter(String name, String value, boolean replace) {
List values = new ArrayList<>(value == null ? 0 : 1);
if (value != null) {
values.add(value);
}
addValuesToParameter(name, values, replace);
}
protected void addValuesToParameter(String name, List valuesRef, boolean replace) {
List values = new ArrayList<>();
if (valuesRef != null) {
for (Iterator it = valuesRef.iterator(); it.hasNext();) {
String string = it.next();
if (encoding != null) {
try {
values.add(URLEncoder.encode(string, encoding));
} catch (UnsupportedEncodingException ex) {
throw new RuntimeException(ex);
}
}
else {
values.add(string);
}
}
values.removeAll(NULL_LIST);
}
if (parameters == null) {
parameters = new LinkedHashMap<>();
}
if (replace) {
parameters.put(name, values);
}
else {
List currentValues = parameters.get(name);
if (currentValues == null) {
currentValues = new ArrayList<>(1);
parameters.put(name, currentValues);
}
currentValues.addAll(values);
}
}
// --------------------------------------------------------- Private Methods
private void cleanFragment() {
if (fragment != null) {
String f = fragment;
f = f.trim();
if (f.startsWith(FRAGMENT_SEPARATOR)) {
f = f.substring(1);
}
if (f.length() == 0) {
f = null;
}
fragment = f;
}
}
private void cleanQueryString() {
if (queryString != null) {
String q = queryString;
q = q.trim();
if (q.startsWith(QUERY_STRING_SEPARATOR)) {
q = q.substring(1);
}
if (q.length() == 0) {
q = null;
}
queryString = q;
}
}
}