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/* Copyright (c) 2001-2019, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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package org.hsqldb.lib.tar;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.hsqldb.lib.java.JavaSystem;
/**
* Pax Interchange Format object constituted from an Input Stream.
*
* Right now, the only Pax property that we support directly is "size".
*
*/
public class PIFData extends HashMap {
static final long serialVersionUID = 3086795680582315773L;
private static Pattern pifRecordPattern =
Pattern.compile("\\d+ +([^=]+)=(.*)");
/**
* N.b. this is nothing to do with HashMap.size() or Map.size().
* This returns the value of the Pax "size" property.
* @return Pax size
*/
public Long getSize() {
return sizeObject;
}
private Long sizeObject = null;
public PIFData(InputStream stream)
throws TarMalformatException, IOException {
BufferedReader br = null;
try {
br = new BufferedReader(new InputStreamReader(stream, JavaSystem.CS_UTF8));
String s, k, v;
Matcher m;
int lineNum = 0;
/*
* Pax spec does not allow for blank lines, ignored white space,
* nor comments of any type, in the file.
*/
while ((s = br.readLine()) != null) {
lineNum++;
m = pifRecordPattern.matcher(s);
if (!m.matches()) {
throw new TarMalformatException(
RB.pif_malformat.getString(lineNum, s));
}
k = m.group(1);
v = m.group(2);
if (v == null || v.length() < 1) {
remove(k);
} else {
put(k, v);
}
}
} finally {
try {
stream.close();
} finally {
br = null; // Encourage buffer GC
}
}
String sizeString = get("size");
if (sizeString != null) {
try {
sizeObject = Long.valueOf(sizeString);
} catch (NumberFormatException nfe) {
throw new TarMalformatException(
RB.pif_malformat_size.getString(sizeString));
}
}
}
}