org.kuali.student.contract.writer.StringQuoter Maven / Gradle / Ivy

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/*
 * Copyright 2009 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.osedu.org/licenses/ECL-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.kuali.student.contract.writer;

/**
 *
 * @author nwright
 */
public class StringQuoter {

    public static String quote(String value) {
        if (value == null) {
            return null;
        }
        StringBuffer buf = new StringBuffer(value.length() + 3);
        buf.append('"');
        boolean lastCharWasEscape = false;
        for (int i = 0; i < value.length(); i++) {
            char c = value.charAt(i);
            switch (c) {
                case '"':
                    if (!lastCharWasEscape) {
                        buf.append('\\');
                    }
                    lastCharWasEscape = false;
                    break;
                case '\\':
                    if (!lastCharWasEscape) {
                        buf.append('\\');
                    }
                    lastCharWasEscape = true;
                    break;
                case '\n':
                case '\r':
                    buf.append('"');
                    buf.append("\n");
                    buf.append("\t + ");
                    buf.append('"');
                    lastCharWasEscape = false;
                    continue;
                default:
                    lastCharWasEscape = false;
            }
            buf.append(c);
        }
        buf.append('"');
        return buf.toString();
    }
}