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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.util;
import java.util.ArrayList;
import java.util.List;
/**
* Utility class for parsing quoted string which is intended for parameters, separated by comma.
*/
public final class StringQuoteHelper {
private StringQuoteHelper() {
}
/**
* Returns the text wrapped double quotes
*/
public static String doubleQuote(String text) {
return quote(text, "\"");
}
/**
* Returns the text wrapped single quotes
*/
public static String singleQuote(String text) {
return quote(text, "'");
}
/**
* Wraps the text in the given quote text
*
* @param text the text to wrap in quotes
* @param quote the quote text added to the prefix and postfix of the text
*
* @return the text wrapped in the given quotes
*/
public static String quote(String text, String quote) {
return quote + text + quote;
}
/**
* Splits the input safely honoring if values is enclosed in quotes.
*
* Though this method does not support double quoting values. A quoted value
* must start with the same start and ending quote, which is either a single
* quote or double quote value.
*
* Will trim each splitted value by default.
*
* @param input the input
* @param separator the separator char to split the input, for example a comma.
* @return the input splitted, or null if the input is null.
*/
public static String[] splitSafeQuote(String input, char separator) {
return splitSafeQuote(input, separator, true);
}
/**
* Splits the input safely honoring if values is enclosed in quotes.
*
* Though this method does not support double quoting values. A quoted value
* must start with the same start and ending quote, which is either a single
* quote or double quote value.
* \
* @param input the input
* @param separator the separator char to split the input, for example a comma.
* @param trim whether to trim each splitted value
* @return the input splitted, or null if the input is null.
*/
public static String[] splitSafeQuote(String input, char separator, boolean trim) {
if (input == null) {
return null;
}
if (input.indexOf(separator) == -1) {
// no separator in data, so return single string with input as is
return new String[]{trim ? input.trim() : input};
}
List answer = new ArrayList();
StringBuilder sb = new StringBuilder();
boolean singleQuoted = false;
boolean doubleQuoted = false;
boolean skipLeadingWhitespace = true;
for (int i = 0; i < input.length(); i++) {
char ch = input.charAt(i);
char prev = i > 0 ? input.charAt(i - 1) : 0;
boolean isQuoting = singleQuoted || doubleQuoted;
if (!doubleQuoted && ch == '\'') {
if (singleQuoted && prev == ch && sb.length() == 0) {
// its an empty quote so add empty text
answer.add("");
}
// special logic needed if this quote is the end
if (i == input.length() - 1) {
if (singleQuoted && sb.length() > 0) {
String text = sb.toString();
// do not trim a quoted string
answer.add(text);
sb.setLength(0);
}
}
singleQuoted = !singleQuoted;
continue;
} else if (!singleQuoted && ch == '"') {
if (doubleQuoted && prev == ch && sb.length() == 0) {
// its an empty quote so add empty text
answer.add("");
}
// special logic needed if this quote is the end
if (i == input.length() - 1) {
if (doubleQuoted && sb.length() > 0) {
String text = sb.toString();
// do not trim a quoted string
answer.add(text);
sb.setLength(0);
}
}
doubleQuoted = !doubleQuoted;
continue;
} else if (!isQuoting && ch == ' ') {
if (skipLeadingWhitespace) {
continue;
}
} else if (!isQuoting && ch == separator) {
// add as answer if we are not in a quote
if (sb.length() > 0) {
String text = sb.toString();
if (trim) {
text = text.trim();
}
answer.add(text);
sb.setLength(0);
}
// we should avoid adding the separator
continue;
}
sb.append(ch);
}
// any leftover
if (sb.length() > 0) {
String text = sb.toString();
if (trim) {
text = text.trim();
}
answer.add(text);
}
return answer.toArray(new String[answer.size()]);
}
}