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The Core Camel Java DSL based router
/**
* 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.camel.runtimecatalog;
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.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* Copied from org.apache.camel.util.URISupport
*/
public final class URISupport {
public static final String RAW_TOKEN_START = "RAW(";
public static final String RAW_TOKEN_END = ")";
private static final String CHARSET = "UTF-8";
private URISupport() {
// Helper class
}
/**
* Normalizes the URI so unsafe characters is encoded
*
* @param uri the input uri
* @return as URI instance
* @throws URISyntaxException is thrown if syntax error in the input uri
*/
public static URI normalizeUri(String uri) throws URISyntaxException {
return new URI(UnsafeUriCharactersEncoder.encode(uri, true));
}
public static Map extractProperties(Map properties, String optionPrefix) {
Map rc = new LinkedHashMap(properties.size());
for (Iterator> it = properties.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = it.next();
String name = entry.getKey();
if (name.startsWith(optionPrefix)) {
Object value = properties.get(name);
name = name.substring(optionPrefix.length());
rc.put(name, value);
it.remove();
}
}
return rc;
}
/**
* Strips the query parameters from the uri
*
* @param uri the uri
* @return the uri without the query parameter
*/
public static String stripQuery(String uri) {
int idx = uri.indexOf('?');
if (idx > -1) {
uri = uri.substring(0, idx);
}
return uri;
}
/**
* Parses the query parameters of the uri (eg the query part).
*
* @param uri the uri
* @return the parameters, or an empty map if no parameters (eg never null)
* @throws URISyntaxException is thrown if uri has invalid syntax.
*/
public static Map parseParameters(URI uri) throws URISyntaxException {
String query = uri.getQuery();
if (query == null) {
String schemeSpecificPart = uri.getSchemeSpecificPart();
int idx = schemeSpecificPart.indexOf('?');
if (idx < 0) {
// return an empty map
return new LinkedHashMap(0);
} else {
query = schemeSpecificPart.substring(idx + 1);
}
} else {
query = stripPrefix(query, "?");
}
return parseQuery(query);
}
/**
* Strips the prefix from the value.
*
* Returns the value as-is if not starting with the prefix.
*
* @param value the value
* @param prefix the prefix to remove from value
* @return the value without the prefix
*/
public static String stripPrefix(String value, String prefix) {
if (value != null && value.startsWith(prefix)) {
return value.substring(prefix.length());
}
return value;
}
/**
* Parses the query part of the uri (eg the parameters).
*
* The URI parameters will by default be URI encoded. However you can define a parameter
* values with the syntax: key=RAW(value) which tells Camel to not encode the value,
* and use the value as is (eg key=value) and the value has not been encoded.
*
* @param uri the uri
* @return the parameters, or an empty map if no parameters (eg never null)
* @throws URISyntaxException is thrown if uri has invalid syntax.
* @see #RAW_TOKEN_START
* @see #RAW_TOKEN_END
*/
public static Map parseQuery(String uri) throws URISyntaxException {
return parseQuery(uri, false);
}
/**
* Parses the query part of the uri (eg the parameters).
*
* The URI parameters will by default be URI encoded. However you can define a parameter
* values with the syntax: key=RAW(value) which tells Camel to not encode the value,
* and use the value as is (eg key=value) and the value has not been encoded.
*
* @param uri the uri
* @param useRaw whether to force using raw values
* @return the parameters, or an empty map if no parameters (eg never null)
* @throws URISyntaxException is thrown if uri has invalid syntax.
* @see #RAW_TOKEN_START
* @see #RAW_TOKEN_END
*/
public static Map parseQuery(String uri, boolean useRaw) throws URISyntaxException {
// must check for trailing & as the uri.split("&") will ignore those
if (uri != null && uri.endsWith("&")) {
throw new URISyntaxException(uri, "Invalid uri syntax: Trailing & marker found. "
+ "Check the uri and remove the trailing & marker.");
}
if (isEmpty(uri)) {
// return an empty map
return new LinkedHashMap(0);
}
// need to parse the uri query parameters manually as we cannot rely on splitting by &,
// as & can be used in a parameter value as well.
try {
// use a linked map so the parameters is in the same order
Map rc = new LinkedHashMap();
boolean isKey = true;
boolean isValue = false;
boolean isRaw = false;
StringBuilder key = new StringBuilder();
StringBuilder value = new StringBuilder();
// parse the uri parameters char by char
for (int i = 0; i < uri.length(); i++) {
// current char
char ch = uri.charAt(i);
// look ahead of the next char
char next;
if (i <= uri.length() - 2) {
next = uri.charAt(i + 1);
} else {
next = '\u0000';
}
// are we a raw value
isRaw = value.toString().startsWith(RAW_TOKEN_START);
// if we are in raw mode, then we keep adding until we hit the end marker
if (isRaw) {
if (isKey) {
key.append(ch);
} else if (isValue) {
value.append(ch);
}
// we only end the raw marker if its )& or at the end of the value
boolean end = ch == RAW_TOKEN_END.charAt(0) && (next == '&' || next == '\u0000');
if (end) {
// raw value end, so add that as a parameter, and reset flags
addParameter(key.toString(), value.toString(), rc, useRaw || isRaw);
key.setLength(0);
value.setLength(0);
isKey = true;
isValue = false;
isRaw = false;
// skip to next as we are in raw mode and have already added the value
i++;
}
continue;
}
// if its a key and there is a = sign then the key ends and we are in value mode
if (isKey && ch == '=') {
isKey = false;
isValue = true;
isRaw = false;
continue;
}
// the & denote parameter is ended
if (ch == '&') {
// parameter is ended, as we hit & separator
String aKey = key.toString();
// the key may be a placeholder of options which we then do not know what is
boolean validKey = !aKey.startsWith("{{") && !aKey.endsWith("}}");
if (validKey) {
addParameter(aKey, value.toString(), rc, useRaw || isRaw);
}
key.setLength(0);
value.setLength(0);
isKey = true;
isValue = false;
isRaw = false;
continue;
}
// regular char so add it to the key or value
if (isKey) {
key.append(ch);
} else if (isValue) {
value.append(ch);
}
}
// any left over parameters, then add that
if (key.length() > 0) {
String aKey = key.toString();
// the key may be a placeholder of options which we then do not know what is
boolean validKey = !aKey.startsWith("{{") && !aKey.endsWith("}}");
if (validKey) {
addParameter(aKey, value.toString(), rc, useRaw || isRaw);
}
}
return rc;
} catch (UnsupportedEncodingException e) {
URISyntaxException se = new URISyntaxException(e.toString(), "Invalid encoding");
se.initCause(e);
throw se;
}
}
@SuppressWarnings("unchecked")
private static void addParameter(String name, String value, Map map, boolean isRaw) throws UnsupportedEncodingException {
name = URLDecoder.decode(name, CHARSET);
if (!isRaw) {
// need to replace % with %25
value = URLDecoder.decode(value.replaceAll("%", "%25"), CHARSET);
}
// does the key already exist?
if (map.containsKey(name)) {
// yes it does, so make sure we can support multiple values, but using a list
// to hold the multiple values
Object existing = map.get(name);
List list;
if (existing instanceof List) {
list = (List) existing;
} else {
// create a new list to hold the multiple values
list = new ArrayList();
String s = existing != null ? existing.toString() : null;
if (s != null) {
list.add(s);
}
}
list.add(value);
map.put(name, list);
} else {
map.put(name, value);
}
}
/**
* Assembles a query from the given map.
*
* @param options the map with the options (eg key/value pairs)
* @param ampersand to use & for Java code, and & for XML
* @return a query string with key1=value&key2=value2&..., or an empty string if there is no options.
* @throws URISyntaxException is thrown if uri has invalid syntax.
*/
public static String createQueryString(Map options, String ampersand, boolean encode) throws URISyntaxException {
try {
if (options.size() > 0) {
StringBuilder rc = new StringBuilder();
boolean first = true;
for (Object o : options.keySet()) {
if (first) {
first = false;
} else {
rc.append(ampersand);
}
String key = (String) o;
Object value = options.get(key);
// use the value as a String
String s = value != null ? value.toString() : null;
appendQueryStringParameter(key, s, rc, encode);
}
return rc.toString();
} else {
return "";
}
} catch (UnsupportedEncodingException e) {
URISyntaxException se = new URISyntaxException(e.toString(), "Invalid encoding");
se.initCause(e);
throw se;
}
}
private static void appendQueryStringParameter(String key, String value, StringBuilder rc, boolean encode) throws UnsupportedEncodingException {
if (encode) {
rc.append(URLEncoder.encode(key, CHARSET));
} else {
rc.append(key);
}
// only append if value is not null
if (value != null) {
rc.append("=");
if (value.startsWith(RAW_TOKEN_START) && value.endsWith(RAW_TOKEN_END)) {
// do not encode RAW parameters
rc.append(value);
} else {
if (encode) {
rc.append(URLEncoder.encode(value, CHARSET));
} else {
rc.append(value);
}
}
}
}
/**
* Tests whether the value is null or an empty string.
*
* @param value the value, if its a String it will be tested for text length as well
* @return true if empty
*/
public static boolean isEmpty(Object value) {
return !isNotEmpty(value);
}
/**
* Tests whether the value is not null or an empty string.
*
* @param value the value, if its a String it will be tested for text length as well
* @return true if not empty
*/
public static boolean isNotEmpty(Object value) {
if (value == null) {
return false;
} else if (value instanceof String) {
String text = (String) value;
return text.trim().length() > 0;
} else {
return true;
}
}
}