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fix(datahub-client): support utf8 encoding (datahub-project#4878)
fixes datahub-project#4700
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149 changes: 149 additions & 0 deletions
149
metadata-integration/java/datahub-client/src/main/java/datahub/event/StringEscapeUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| /** | ||
| * 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. | ||
| */ | ||
|
|
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| package datahub.event; | ||
|
|
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| import java.io.IOException; | ||
| import java.io.StringWriter; | ||
| import java.io.Writer; | ||
| import java.util.Locale; | ||
|
|
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| public class StringEscapeUtils { | ||
|
|
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| private StringEscapeUtils() { | ||
|
|
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| } | ||
|
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| /** | ||
| * Worker method for the {@link #escapeJavaScript(String)} method. | ||
| * | ||
| * @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> | ||
| * @param escapeForwardSlash TODO | ||
| * @throws IOException if an IOException occurs | ||
| */ | ||
| private static void escapeJavaStyleString(Writer out, String str, boolean escapeSingleQuote, | ||
| boolean escapeForwardSlash) throws IOException { | ||
| if (out == null) { | ||
| throw new IllegalArgumentException("The Writer must not be null"); | ||
| } else if (str != null) { | ||
| int sz = str.length(); | ||
|
|
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| for (int i = 0; i < sz; ++i) { | ||
| char ch = str.charAt(i); | ||
| if (ch > 4095) { | ||
| out.write("\\u" + hex(ch)); | ||
| } else if (ch > 255) { | ||
| out.write("\\u0" + hex(ch)); | ||
| } else if (ch > 127) { | ||
| out.write("\\u00" + hex(ch)); | ||
| } else if (ch < ' ') { | ||
| switch (ch) { | ||
| case '\b': | ||
| out.write(92); | ||
| out.write(98); | ||
| break; | ||
| case '\t': | ||
| out.write(92); | ||
| out.write(116); | ||
| break; | ||
| case '\n': | ||
| out.write(92); | ||
| out.write(110); | ||
| break; | ||
| case '\u000b': | ||
|
|
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| case '\f': | ||
| out.write(92); | ||
| out.write(102); | ||
| break; | ||
| case '\r': | ||
| out.write(92); | ||
| out.write(114); | ||
| break; | ||
| default: | ||
| if (ch > 15) { | ||
| out.write("\\u00" + hex(ch)); | ||
| } else { | ||
| out.write("\\u000" + hex(ch)); | ||
| } | ||
| break; | ||
| } | ||
|
|
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| } else { | ||
| out.write(ch); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| /** | ||
| * Returns an upper case hexadecimal <code>String</code> for the given | ||
| * character. | ||
| * | ||
| * @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(Locale.ENGLISH); | ||
| } | ||
|
|
||
| /** | ||
| * Worker method for the {@link #escapeJavaScript(String)} method. | ||
| * | ||
| * @param str String to escape values in, may be null | ||
| * @param escapeSingleQuotes escapes single quotes if <code>true</code> | ||
| * @param escapeForwardSlash TODO | ||
| * @return the escaped string | ||
| */ | ||
| private static String escapeJavaStyleString(String str, boolean escapeSingleQuotes, boolean escapeForwardSlash) throws IOException { | ||
| if (str == null) { | ||
| return null; | ||
| } else { | ||
| StringWriter writer = new StringWriter(str.length() * 2); | ||
| escapeJavaStyleString(writer, str, escapeSingleQuotes, escapeForwardSlash); | ||
| return writer.toString(); | ||
|
|
||
| } | ||
| } | ||
|
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| /** | ||
| * Escapes the characters in a <code>String</code> using Java String rules. | ||
| * <p> | ||
| * Deals correctly with quotes and control-chars (tab, backslash, cr, ff, etc.) | ||
| * <p> | ||
| * So a tab becomes the characters <code>'\\'</code> and <code>'t'</code>. | ||
| * <p> | ||
| * The only difference between Java strings and JavaScript strings | ||
| * is that in JavaScript, a single quote must be escaped. | ||
| * <p> | ||
| * Example: | ||
| * <pre> | ||
| * input string: He didn't say, "Stop!" | ||
| * output string: He didn't say, \"Stop!\" | ||
| * </pre> | ||
| * | ||
| * @param str String to escape values in, may be null | ||
| * @return String with escaped values, <code>null</code> if null string input | ||
| */ | ||
| public static String escapeJava(String str) throws IOException { | ||
| return escapeJavaStyleString(str, false, false); | ||
| } | ||
| } |
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