Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;

public class Main {
    /**
     * Pulled from apache lang commons project (StringUtils).
     * 
     * <p>Worker method for the {@link #escapeJavaScript(String)} method.</p>
     * 
     * @param str String to escape values in, may be null
     * @param escapeSingleQuotes escapes single quotes if <code>true</code>
     * @return the escaped string
     */
    private static String escapeJavaStyleString(String str, boolean escapeSingleQuotes) {
        if (str == null) {
            return null;
        }
        try {
            StringWriter writer = new StringWriter(str.length() * 2);
            escapeJavaStyleString(writer, str, escapeSingleQuotes);
            return writer.toString();
        } catch (IOException ioe) {
            // this should never ever happen while writing to a StringWriter
            ioe.printStackTrace();
            return null;
        }
    }

    /**
     * Pulled from apache lang commons project (StringUtils).
     * 
     * <p>Worker method for the {@link #escapeJavaScript(String)} method.</p>
     * 
     * @param out write to receieve the escaped string
     * @param str String to escape values in, may be null
     * @param escapeSingleQuote escapes single quotes if <code>true</code>. For Java this is usually false and for Javascript it is true.
     * @throws IOException if an IOException occurs
     */
    private static void escapeJavaStyleString(Writer out, String str, boolean escapeSingleQuote)
            throws IOException {
        if (out == null) {
            throw new IllegalArgumentException("The Writer must not be null");
        }
        if (str == null) {
            return;
        }
        int sz;
        sz = str.length();
        for (int i = 0; i < sz; i++) {
            char ch = str.charAt(i);

            // handle unicode
            if (ch > 0xfff) {
                out.write("\\u" + hex(ch));
            } else if (ch > 0xff) {
                out.write("\\u0" + hex(ch));
            } else if (ch > 0x7f) {
                out.write("\\u00" + hex(ch));
            } else if (ch < 32) {
                switch (ch) {
                case '\b':
                    out.write('\\');
                    out.write('b');
                    break;
                case '\n':
                    out.write('\\');
                    out.write('n');
                    break;
                case '\t':
                    out.write('\\');
                    out.write('t');
                    break;
                case '\f':
                    out.write('\\');
                    out.write('f');
                    break;
                case '\r':
                    out.write('\\');
                    out.write('r');
                    break;
                default:
                    if (ch > 0xf) {
                        out.write("\\u00" + hex(ch));
                    } else {
                        out.write("\\u000" + hex(ch));
                    }
                    break;
                }
            } else {
                switch (ch) {
                case '\'':
                    if (escapeSingleQuote) {
                        out.write('\\');
                    }
                    out.write('\'');
                    break;
                case '"':
                    out.write('\\');
                    out.write('"');
                    break;
                case '\\':
                    out.write('\\');
                    out.write('\\');
                    break;
                case '/':
                    out.write('\\');
                    out.write('/');
                    break;
                default:
                    out.write(ch);
                    break;
                }
            }
        }
    }

    /**
     * Pulled from apache lang commons project (StringUtils).
     * 
     * <p>Returns an upper case hexadecimal <code>String</code> for the given
     * character.</p>
     * 
     * @param ch The character to convert.
     * @return An upper case hexadecimal <code>String</code>
     */
    private static String hex(char ch) {
        return Integer.toHexString(ch).toUpperCase();
    }
}