package com.googlecode.gwt.test.internal.utils;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import com.googlecode.gwt.test.exceptions.GwtTestI18NException;
import com.googlecode.gwt.test.internal.AfterTestCallback;
import com.googlecode.gwt.test.internal.AfterTestCallbackManager;
/**
*
* Some .properties files utility methods. It enables the caching of resources. <strong>For internal
* use only.</strong>
*
* @author Bertrand Paquet
* @author Gael Lazzari
*
*/
public class GwtPropertiesHelper implements AfterTestCallback {
/*
* Read in a "logical line" from an InputStream/Reader, skip all comment and blank lines and
* filter out those leading whitespace characters ( , and ) from the beginning of a
* "natural line". Method returns the char length of the "logical line" and stores the line in
* "lineBuf".
*/
static class LineReader {
byte[] inByteBuf;
char[] inCharBuf;
int inLimit = 0;
int inOff = 0;
InputStream inStream;
char[] lineBuf = new char[1024];
Reader reader;
public LineReader(InputStream inStream) {
this.inStream = inStream;
inByteBuf = new byte[8192];
}
public LineReader(Reader reader) {
this.reader = reader;
inCharBuf = new char[8192];
}
int readLine() throws IOException {
int len = 0;
char c = 0;
boolean skipWhiteSpace = true;
boolean isCommentLine = false;
boolean isNewLine = true;
boolean appendedLineBegin = false;
boolean precedingBackslash = false;
boolean skipLF = false;
while (true) {
if (inOff >= inLimit) {
inLimit = inStream == null ? reader.read(inCharBuf) : inStream.read(inByteBuf);
inOff = 0;
if (inLimit <= 0) {
if (len == 0 || isCommentLine) {
return -1;
}
return len;
}
}
if (inStream != null) {
// The line below is equivalent to calling a
// ISO8859-1 decoder.
c = (char) (0xff & inByteBuf[inOff++]);
} else {
c = inCharBuf[inOff++];
}
if (skipLF) {
skipLF = false;
if (c == '\n') {
continue;
}
}
if (skipWhiteSpace) {
if (c == ' ' || c == '\t' || c == '\f') {
continue;
}
if (!appendedLineBegin && (c == '\r' || c == '\n')) {
continue;
}
skipWhiteSpace = false;
appendedLineBegin = false;
}
if (isNewLine) {
isNewLine = false;
if (c == '#' || c == '!') {
isCommentLine = true;
continue;
}
}
if (c != '\n' && c != '\r') {
lineBuf[len++] = c;
if (len == lineBuf.length) {
int newLength = lineBuf.length * 2;
if (newLength < 0) {
newLength = Integer.MAX_VALUE;
}
char[] buf = new char[newLength];
System.arraycopy(lineBuf, 0, buf, 0, lineBuf.length);
lineBuf = buf;
}
// flip the preceding backslash flag
if (c == '\\') {
precedingBackslash = !precedingBackslash;
} else {
precedingBackslash = false;
}
} else {
// reached EOL
if (isCommentLine || len == 0) {
isCommentLine = false;
isNewLine = true;
skipWhiteSpace = true;
len = 0;
continue;
}
if (inOff >= inLimit) {
inLimit = inStream == null ? reader.read(inCharBuf) : inStream.read(inByteBuf);
inOff = 0;
if (inLimit <= 0) {
return len;
}
}
if (precedingBackslash) {
len -= 1;
// skip the leading whitespace characters in following line
skipWhiteSpace = true;
appendedLineBegin = true;
precedingBackslash = false;
if (c == '\r') {
skipLF = true;
}
} else {
return len;
}
}
}
}
}
private static class SequenceReplacement {
private final String regex;
private final String to;
public SequenceReplacement(String regex, String to) {
this.regex = regex;
this.to = to;
}
public String treat(String s) {
return s.replaceAll(regex, to);
}
}
private static final GwtPropertiesHelper INSTANCE = new GwtPropertiesHelper();
public static GwtPropertiesHelper get() {
return INSTANCE;
}
private final Map<String, Properties> cachedProperties;
private final List<SequenceReplacement> sequenceReplacements;
private GwtPropertiesHelper() {
cachedProperties = new HashMap<String, Properties>();
sequenceReplacements = new ArrayList<GwtPropertiesHelper.SequenceReplacement>();
initSequenceReplacements();
AfterTestCallbackManager.get().registerCallback(this);
}
public void afterTest() throws Throwable {
// cachedProperties.clear();
sequenceReplacements.clear();
initSequenceReplacements();
}
public Properties getLocalizedProperties(String prefix, Locale locale) {
if (locale != null) {
prefix += "_" + locale.toString();
}
return getProperties(prefix);
}
public Properties getProperties(String path) {
if (cachedProperties.containsKey(path)) {
return cachedProperties.get(path);
}
String propertiesNameFile = "/" + path + ".properties";
InputStream inputStream = path.getClass().getResourceAsStream(propertiesNameFile);
if (inputStream == null) {
cachedProperties.put(path, null);
return null;
}
try {
Properties properties = new Properties();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
load(properties, inputStreamReader);
cachedProperties.put(path, properties);
return properties;
} catch (Exception e) {
throw new GwtTestI18NException("Unable to load property file [" + path + "]", e);
}
}
public void replaceSequence(String regex, String to) {
sequenceReplacements.add(new SequenceReplacement(regex, to));
}
public String treatString(String string) {
for (SequenceReplacement sequenceReplacement : sequenceReplacements) {
string = sequenceReplacement.treat(string);
}
return string;
}
private void initSequenceReplacements() {
// hardcoded to fix gwt "bug"
sequenceReplacements.add(new SequenceReplacement("\\u00A0", " "));
}
/**
* Method copied from JDK 1.6 Properties.load(Reader)..
*
* @param properties
* @param reader
* @throws IOException
*/
private synchronized void load(Properties properties, Reader reader) throws IOException {
load0(properties, new LineReader(reader));
}
private void load0(Properties properties, LineReader lr) throws IOException {
char[] convtBuf = new char[1024];
int limit;
int keyLen;
int valueStart;
char c;
boolean hasSep;
boolean precedingBackslash;
while ((limit = lr.readLine()) >= 0) {
c = 0;
keyLen = 0;
valueStart = limit;
hasSep = false;
precedingBackslash = false;
while (keyLen < limit) {
c = lr.lineBuf[keyLen];
// need check if escaped.
if ((c == '=' || c == ':') && !precedingBackslash) {
valueStart = keyLen + 1;
hasSep = true;
break;
} else if ((c == ' ' || c == '\t' || c == '\f') && !precedingBackslash) {
valueStart = keyLen + 1;
break;
}
if (c == '\\') {
precedingBackslash = !precedingBackslash;
} else {
precedingBackslash = false;
}
keyLen++;
}
while (valueStart < limit) {
c = lr.lineBuf[valueStart];
if (c != ' ' && c != '\t' && c != '\f') {
if (!hasSep && (c == '=' || c == ':')) {
hasSep = true;
} else {
break;
}
}
valueStart++;
}
String key = loadConvert(lr.lineBuf, 0, keyLen, convtBuf);
String value = loadConvert(lr.lineBuf, valueStart, limit - valueStart, convtBuf);
properties.put(key, value);
}
}
/*
* Converts encoded \uxxxx to unicode chars and changes special saved chars to their original
* forms
*/
private String loadConvert(char[] in, int off, int len, char[] convtBuf) {
if (convtBuf.length < len) {
int newLen = len * 2;
if (newLen < 0) {
newLen = Integer.MAX_VALUE;
}
convtBuf = new char[newLen];
}
char aChar;
char[] out = convtBuf;
int outLen = 0;
int end = off + len;
while (off < end) {
aChar = in[off++];
if (aChar == '\\') {
aChar = in[off++];
if (aChar == 'u') {
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++) {
aChar = in[off++];
switch (aChar) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
value = (value << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException("Malformed \\uxxxx encoding.");
}
}
out[outLen++] = (char) value;
} else {
if (aChar == 't') {
aChar = '\t';
} else if (aChar == 'r') {
aChar = '\r';
} else if (aChar == 'n') {
aChar = '\n';
} else if (aChar == 'f') {
aChar = '\f';
}
out[outLen++] = aChar;
}
} else {
out[outLen++] = aChar;
}
}
String line = new String(out, 0, outLen);
// hack of the JDK 6 function
return treatString(line);
}
}