Put quotes around the given String if necessary. : String « Data Type « Java
Put quotes around the given String if necessary.
import java.io.File;
/*
* 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.
*
*@author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
*/
public class Main {
private static final String SINGLE_QUOTE = "\'";
private static final String DOUBLE_QUOTE = "\"";
private static final char SLASH_CHAR = '/';
private static final char BACKSLASH_CHAR = '\\';
/**
* Put quotes around the given String if necessary.
* <p>
* If the argument doesn't include spaces or quotes, return it as is. If it
* contains double quotes, use single quotes - else surround the argument by
* double quotes.
* </p>
*
* @param argument the argument to be quoted
* @return the quoted argument
* @throws IllegalArgumentException If argument contains both types of quotes
*/
public static String quoteArgument(final String argument) {
String cleanedArgument = argument.trim();
while(cleanedArgument.startsWith(SINGLE_QUOTE) || cleanedArgument.startsWith(DOUBLE_QUOTE)) {
cleanedArgument = cleanedArgument.substring(1);
}
while(cleanedArgument.endsWith(SINGLE_QUOTE) || cleanedArgument.endsWith(DOUBLE_QUOTE)) {
cleanedArgument = cleanedArgument.substring(0, cleanedArgument.length() - 1);
}
final StringBuffer buf = new StringBuffer();
if (cleanedArgument.indexOf(DOUBLE_QUOTE) > -1) {
if (cleanedArgument.indexOf(SINGLE_QUOTE) > -1) {
throw new IllegalArgumentException(
"Can't handle single and double quotes in same argument");
} else {
return buf.append(SINGLE_QUOTE).append(cleanedArgument).append(
SINGLE_QUOTE).toString();
}
} else if (cleanedArgument.indexOf(SINGLE_QUOTE) > -1
|| cleanedArgument.indexOf(" ") > -1) {
return buf.append(DOUBLE_QUOTE).append(cleanedArgument).append(
DOUBLE_QUOTE).toString();
} else {
return cleanedArgument;
}
}
}
