package com.jeeplus.common.utils;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.util.List;
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import java.util.Properties;
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import com.google.common.base.Objects;
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import com.google.common.collect.Lists;
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/**
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* <p>
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* 有序的properties的工具类，由于JDK自身的写会乱序，所以采用这个工具类来保证读写次序正常.
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* </p>
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*
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* @author poplar.yfyang
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* @version 1.0 2013-01-02 12:57 PM
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* @since JDK 1.5
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*/
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public class OrderProperties extends Properties {
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/** 序列化ID */
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private static final long serialVersionUID = -762117852594617585L;
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private static final String keyValueSeparators = "=: \t\r\n\f";
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private static final String strictKeyValueSeparators = "=:";
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private static final String specialSaveChars = "=: \t\r\n\f#!";
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private static final String whiteSpaceChars = " \t\r\n\f";
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/** A table of hex digits */
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private static final char[] hexDigit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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private PropertiesContext context = new PropertiesContext();
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private static void writeln(BufferedWriter bw, String s) throws IOException {
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bw.write(s);
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bw.newLine();
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}
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/**
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* Convert a nibble to a hex character
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*
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* @param nibble the nibble to convert.
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*/
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private static char toHex(int nibble) {
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return hexDigit[(nibble & 0xF)];
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}
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public PropertiesContext getContext() {
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return context;
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}
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public synchronized void load(InputStream inStream) throws IOException {
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BufferedReader in;
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in = new BufferedReader(new InputStreamReader(inStream, "8859_1"));
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while (true) {
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// Get next line
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String line = in.readLine();
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// intract property/comment string
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String intactLine = line;
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if (line == null)
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return;
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if (line.length() > 0) {
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// Find start of key
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int len = line.length();
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int keyStart;
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for (keyStart = 0; keyStart < len; keyStart++)
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if (whiteSpaceChars.indexOf(line.charAt(keyStart)) == -1)
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break;
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// Blank lines are ignored
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if (keyStart == len)
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continue;
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// Continue lines that end in slashes if they are not comments
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char firstChar = line.charAt(keyStart);
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if ((firstChar != '#') && (firstChar != '!')) {
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while (continueLine(line)) {
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String nextLine = in.readLine();
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intactLine = intactLine + "\n" + nextLine;
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if (nextLine == null)
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nextLine = "";
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String loppedLine = line.substring(0, len - 1);
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// Advance beyond whitespace on new line
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int startIndex;
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for (startIndex = 0; startIndex < nextLine.length(); startIndex++)
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if (whiteSpaceChars.indexOf(nextLine.charAt(startIndex)) == -1)
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break;
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nextLine = nextLine.substring(startIndex, nextLine.length());
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line = loppedLine + nextLine;
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len = line.length();
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}
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// Find separation between key and value
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int separatorIndex;
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for (separatorIndex = keyStart; separatorIndex < len; separatorIndex++) {
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char currentChar = line.charAt(separatorIndex);
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if (currentChar == '\\')
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separatorIndex++;
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else if (keyValueSeparators.indexOf(currentChar) != -1)
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break;
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}
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// Skip over whitespace after key if any
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int valueIndex;
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for (valueIndex = separatorIndex; valueIndex < len; valueIndex++)
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if (whiteSpaceChars.indexOf(line.charAt(valueIndex)) == -1)
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break;
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// Skip over one non whitespace key value separators if any
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if (valueIndex < len)
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if (strictKeyValueSeparators.indexOf(line.charAt(valueIndex)) != -1)
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valueIndex++;
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// Skip over white space after other separators if any
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while (valueIndex < len) {
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if (whiteSpaceChars.indexOf(line.charAt(valueIndex)) == -1)
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break;
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valueIndex++;
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}
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String key = line.substring(keyStart, separatorIndex);
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String value = (separatorIndex < len) ? line.substring(valueIndex, len) : "";
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// Convert then store key and value
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key = loadConvert(key);
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value = loadConvert(value);
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//memorize the property also with the whold string
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put(key, value, intactLine);
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} else {
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//memorize the comment string
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context.addCommentLine(intactLine);
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}
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} else {
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//memorize the string even the string is empty
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context.addCommentLine(intactLine);
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}
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}
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}
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/*
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* Converts encoded \uxxxx to unicode chars and changes special saved
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* chars to their original forms
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*/
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private String loadConvert(String theString) {
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char aChar;
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int len = theString.length();
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StringBuilder outBuffer = new StringBuilder(len);
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for (int x = 0; x < len; ) {
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aChar = theString.charAt(x++);
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if (aChar == '\\') {
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aChar = theString.charAt(x++);
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if (aChar == 'u') {
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// Read the xxxx
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int value = 0;
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for (int i = 0; i < 4; i++) {
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aChar = theString.charAt(x++);
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switch (aChar) {
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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value = (value << 4) + aChar - '0';
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break;
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case 'a':
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case 'b':
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case 'c':
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case 'd':
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case 'e':
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case 'f':
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value = (value << 4) + 10 + aChar - 'a';
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break;
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case 'A':
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case 'B':
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case 'C':
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case 'D':
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case 'E':
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case 'F':
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value = (value << 4) + 10 + aChar - 'A';
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break;
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default:
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throw new IllegalArgumentException("Malformed \\uxxxx encoding.");
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}
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}
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outBuffer.append((char) value);
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} else {
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if (aChar == 't')
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outBuffer.append('\t'); /* ibm@7211 */
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else if (aChar == 'r')
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outBuffer.append('\r'); /* ibm@7211 */
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else if (aChar == 'n') {
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/*
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* ibm@8897 do not convert a \n to a line.separator
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* because on some platforms line.separator is a String
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* of "\r\n". When a Properties class is saved as a file
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* (store()) and then restored (load()) the restored
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* input MUST be the same as the output (so that
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* Properties.equals() works).
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*
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*/
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outBuffer.append('\n'); /* ibm@8897 ibm@7211 */
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} else if (aChar == 'f')
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outBuffer.append('\f'); /* ibm@7211 */
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else
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/* ibm@7211 */
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outBuffer.append(aChar); /* ibm@7211 */
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}
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} else
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outBuffer.append(aChar);
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}
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return outBuffer.toString();
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}
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public synchronized void store(OutputStream out, String header) throws IOException {
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BufferedWriter awriter;
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awriter = new BufferedWriter(new OutputStreamWriter(out, "8859_1"));
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if (header != null)
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writeln(awriter, "#" + header);
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@SuppressWarnings("rawtypes")
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List entrys = context.getCommentOrEntrys();
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for (Object obj : entrys) {
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if (obj.toString() != null) {
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writeln(awriter, obj.toString());
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}
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}
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awriter.flush();
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}
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private boolean continueLine(String line) {
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int slashCount = 0;
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int index = line.length() - 1;
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while ((index >= 0) && (line.charAt(index--) == '\\'))
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slashCount++;
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return (slashCount % 2 == 1);
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}
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/*
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* Converts unicodes to encoded \uxxxx and writes out any of the
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* characters in specialSaveChars with a preceding slash
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*/
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private String saveConvert(String theString, boolean escapeSpace) {
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int len = theString.length();
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StringBuilder outBuffer = new StringBuilder(len * 2);
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for (int x = 0; x < len; x++) {
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char aChar = theString.charAt(x);
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switch (aChar) {
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case ' ':
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if (x == 0 || escapeSpace)
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outBuffer.append('\\');
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outBuffer.append(' ');
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break;
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case '\\':
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outBuffer.append('\\');
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outBuffer.append('\\');
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break;
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case '\t':
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outBuffer.append('\\');
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outBuffer.append('t');
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break;
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case '\n':
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outBuffer.append('\\');
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outBuffer.append('n');
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break;
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case '\r':
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outBuffer.append('\\');
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outBuffer.append('r');
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break;
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case '\f':
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outBuffer.append('\\');
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outBuffer.append('f');
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break;
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default:
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if ((aChar < 0x0020) || (aChar > 0x007e)) {
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outBuffer.append('\\');
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outBuffer.append('u');
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outBuffer.append(toHex((aChar >> 12) & 0xF));
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outBuffer.append(toHex((aChar >> 8) & 0xF));
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outBuffer.append(toHex((aChar >> 4) & 0xF));
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outBuffer.append(toHex(aChar & 0xF));
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} else {
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if (specialSaveChars.indexOf(aChar) != -1)
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outBuffer.append('\\');
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outBuffer.append(aChar);
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}
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}
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}
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return outBuffer.toString();
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}
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public synchronized Object put(Object key, Object value) {
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context.putOrUpdate(key.toString(), value.toString());
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return super.put(key, value);
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}
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public synchronized Object put(Object key, Object value, String line) {
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context.putOrUpdate(key.toString(), value.toString(), line);
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return super.put(key, value);
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}
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public synchronized Object remove(Object key) {
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context.remove(key.toString());
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return super.remove(key);
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}
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/** @param comment */
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public void addComment(String comment) {
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if (comment != null) {
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context.addCommentLine("#" + comment);
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}
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}
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class PropertiesContext {
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/** 描述信息 */
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private List<Object> commentOrEntrys = Lists.newArrayList();
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@SuppressWarnings("rawtypes")
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public List getCommentOrEntrys() {
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return commentOrEntrys;
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}
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public void addCommentLine(String line) {
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commentOrEntrys.add(line);
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}
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public void putOrUpdate(PropertyEntry pe) {
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remove(pe.getKey());
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commentOrEntrys.add(pe);
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}
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public void putOrUpdate(String key, String value, String line) {
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PropertyEntry pe = new PropertyEntry(key, value, line);
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remove(key);
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commentOrEntrys.add(pe);
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}
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public void putOrUpdate(String key, String value) {
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PropertyEntry pe = new PropertyEntry(key, value);
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int index = remove(key);
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commentOrEntrys.add(index, pe);
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}
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public int remove(String key) {
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for (int index = 0; index < commentOrEntrys.size(); index++) {
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Object obj = commentOrEntrys.get(index);
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if (obj instanceof PropertyEntry) {
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if (!Objects.equal(obj, null)) {
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if (key.equals(((PropertyEntry) obj).getKey())) {
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commentOrEntrys.remove(obj);
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return index;
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}
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}
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}
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}
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return commentOrEntrys.size();
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}
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/** 属性描述 */
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class PropertyEntry {
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/** 属性KEY */
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private String key;
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/** 属性值 */
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private String value;
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/** 属性行 */
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private String line;
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public PropertyEntry(String key, String value) {
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this.key = key;
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this.value = value;
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}
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/**
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* 构建属性描述
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*
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* @param key key
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* @param value value
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* @param line line
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*/
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public PropertyEntry(String key, String value, String line) {
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this(key, value);
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this.line = line;
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}
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public String getLine() {
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return line;
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}
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public void setLine(String line) {
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this.line = line;
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}
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public String getKey() {
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return key;
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}
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public void setKey(String key) {
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this.key = key;
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}
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public String getValue() {
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return value;
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}
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public void setValue(String value) {
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this.value = value;
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}
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public String toString() {
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if (line != null) {
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return line;
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}
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if (key != null && value != null) {
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String k = saveConvert(key, true);
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String v = saveConvert(value, false);
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return k + "=" + v;
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}
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return null;
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}
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}
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}
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}
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