org.apache.ibatis.ognl.JavaCharStream Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of mybatis Show documentation
Show all versions of mybatis Show documentation
The MyBatis SQL mapper framework makes it easier to use a relational database with object-oriented
applications. MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or
annotations. Simplicity is the biggest advantage of the MyBatis data mapper over object relational mapping
tools.
/* Generated By:JavaCC: Do not edit this line. JavaCharStream.java Version 7.0 */
/* JavaCCOptions:STATIC=false,SUPPORT_CLASS_VISIBILITY_PUBLIC=true */
package org.apache.ibatis.ognl;
/**
* An implementation of interface CharStream, where the stream is assumed to
* contain only ASCII characters (with java-like unicode escape processing).
*/
public
class JavaCharStream
{
/** Whether parser is static. */
public static final boolean staticFlag = false;
static final int hexval(char c) throws java.io.IOException {
switch(c)
{
case '0' :
return 0;
case '1' :
return 1;
case '2' :
return 2;
case '3' :
return 3;
case '4' :
return 4;
case '5' :
return 5;
case '6' :
return 6;
case '7' :
return 7;
case '8' :
return 8;
case '9' :
return 9;
case 'a' :
case 'A' :
return 10;
case 'b' :
case 'B' :
return 11;
case 'c' :
case 'C' :
return 12;
case 'd' :
case 'D' :
return 13;
case 'e' :
case 'E' :
return 14;
case 'f' :
case 'F' :
return 15;
}
throw new java.io.IOException(); // Should never come here
}
/* Position in buffer. */
public int bufpos = -1;
int bufsize;
int available;
int tokenBegin;
protected int bufline[];
protected int bufcolumn[];
protected int column = 0;
protected int line = 1;
protected boolean prevCharIsCR = false;
protected boolean prevCharIsLF = false;
protected java.io.Reader inputStream;
protected char[] nextCharBuf;
protected char[] buffer;
protected int maxNextCharInd = 0;
protected int nextCharInd = -1;
protected int inBuf = 0;
protected int tabSize = 1;
protected boolean trackLineColumn = true;
public void setTabSize(int i) { tabSize = i; }
public int getTabSize() { return tabSize; }
protected void ExpandBuff(boolean wrapAround)
{
char[] newbuffer = new char[bufsize + 2048];
int newbufline[] = new int[bufsize + 2048];
int newbufcolumn[] = new int[bufsize + 2048];
try
{
if (wrapAround)
{
System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
System.arraycopy(buffer, 0, newbuffer, bufsize - tokenBegin, bufpos);
buffer = newbuffer;
System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
bufline = newbufline;
System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
bufcolumn = newbufcolumn;
bufpos += (bufsize - tokenBegin);
}
else
{
System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
buffer = newbuffer;
System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
bufline = newbufline;
System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
bufcolumn = newbufcolumn;
bufpos -= tokenBegin;
}
}
catch (Throwable t)
{
throw new Error(t.getMessage());
}
available = (bufsize += 2048);
tokenBegin = 0;
}
protected void FillBuff() throws java.io.IOException
{
int i;
if (maxNextCharInd == 4096)
maxNextCharInd = nextCharInd = 0;
try {
if ((i = inputStream.read(nextCharBuf, maxNextCharInd,
4096 - maxNextCharInd)) == -1)
{
inputStream.close();
throw new java.io.IOException();
}
else
maxNextCharInd += i;
return;
}
catch(java.io.IOException e) {
if (bufpos != 0)
{
--bufpos;
backup(0);
}
else
{
bufline[bufpos] = line;
bufcolumn[bufpos] = column;
}
throw e;
}
}
protected char ReadByte() throws java.io.IOException
{
if (++nextCharInd >= maxNextCharInd)
FillBuff();
return nextCharBuf[nextCharInd];
}
/* @return starting character for token. */
public char BeginToken() throws java.io.IOException
{
if (inBuf > 0)
{
--inBuf;
if (++bufpos == bufsize)
bufpos = 0;
tokenBegin = bufpos;
return buffer[bufpos];
}
tokenBegin = 0;
bufpos = -1;
return readChar();
}
protected void AdjustBuffSize()
{
if (available == bufsize)
{
if (tokenBegin > 2048)
{
bufpos = 0;
available = tokenBegin;
}
else
ExpandBuff(false);
}
else if (available > tokenBegin)
available = bufsize;
else if ((tokenBegin - available) < 2048)
ExpandBuff(true);
else
available = tokenBegin;
}
protected void UpdateLineColumn(char c)
{
column++;
if (prevCharIsLF)
{
prevCharIsLF = false;
line += (column = 1);
}
else if (prevCharIsCR)
{
prevCharIsCR = false;
if (c == '\n')
{
prevCharIsLF = true;
}
else
line += (column = 1);
}
switch (c)
{
case '\r' :
prevCharIsCR = true;
break;
case '\n' :
prevCharIsLF = true;
break;
case '\t' :
column--;
column += (tabSize - (column % tabSize));
break;
default :
break;
}
bufline[bufpos] = line;
bufcolumn[bufpos] = column;
}
/* Read a character. */
public char readChar() throws java.io.IOException
{
if (inBuf > 0)
{
--inBuf;
if (++bufpos == bufsize)
bufpos = 0;
return buffer[bufpos];
}
char c;
if (++bufpos == available)
AdjustBuffSize();
if ((buffer[bufpos] = c = ReadByte()) == '\\')
{
if (trackLineColumn) { UpdateLineColumn(c); }
int backSlashCnt = 1;
for (;;) // Read all the backslashes
{
if (++bufpos == available)
AdjustBuffSize();
try
{
if ((buffer[bufpos] = c = ReadByte()) != '\\')
{
if (trackLineColumn) { UpdateLineColumn(c); }
// found a non-backslash char.
if ((c == 'u') && ((backSlashCnt & 1) == 1))
{
if (--bufpos < 0)
bufpos = bufsize - 1;
break;
}
backup(backSlashCnt);
return '\\';
}
}
catch(java.io.IOException e)
{
// We are returning one backslash so we should only backup (count-1)
if (backSlashCnt > 1)
backup(backSlashCnt-1);
return '\\';
}
if (trackLineColumn) { UpdateLineColumn(c); }
backSlashCnt++;
}
// Here, we have seen an odd number of backslash's followed by a 'u'
try
{
while ((c = ReadByte()) == 'u')
++column;
buffer[bufpos] = c = (char)(hexval(c) << 12 |
hexval(ReadByte()) << 8 |
hexval(ReadByte()) << 4 |
hexval(ReadByte()));
column += 4;
}
catch(java.io.IOException e)
{
throw new Error("Invalid escape character at line " + line +
" column " + column + ".");
}
if (backSlashCnt == 1)
return c;
else
{
backup(backSlashCnt - 1);
return '\\';
}
}
else
{
UpdateLineColumn(c);
return c;
}
}
/*
* @deprecated
* @see #getEndColumn
*/
@Deprecated
public int getColumn() {
return bufcolumn[bufpos];
}
/*
* @deprecated
* @see #getEndLine
* @return the line number.
*/
@Deprecated
public int getLine() {
return bufline[bufpos];
}
/** Get end column.
* @return the end column or -1
*/
public int getEndColumn() {
return bufcolumn[bufpos];
}
/** Get end line.
* @return the end line number or -1
*/
public int getEndLine() {
return bufline[bufpos];
}
/** Get the beginning column.
* @return column of token start */
public int getBeginColumn() {
return bufcolumn[tokenBegin];
}
/** @return line number of token start */
public int getBeginLine() {
return bufline[tokenBegin];
}
/** Retreat. */
public void backup(int amount) {
inBuf += amount;
if ((bufpos -= amount) < 0)
bufpos += bufsize;
}
/** Constructor.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
* @param buffersize size of the buffer
*/
public JavaCharStream(java.io.Reader dstream,
int startline, int startcolumn, int buffersize)
{
inputStream = dstream;
line = startline;
column = startcolumn - 1;
available = bufsize = buffersize;
buffer = new char[buffersize];
bufline = new int[buffersize];
bufcolumn = new int[buffersize];
nextCharBuf = new char[4096];
}
/** Constructor.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
*/
public JavaCharStream(java.io.Reader dstream,
int startline, int startcolumn)
{
this(dstream, startline, startcolumn, 4096);
}
/** Constructor.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
*/
public JavaCharStream(java.io.Reader dstream)
{
this(dstream, 1, 1, 4096);
}
/* Reinitialise. */
public void ReInit(java.io.Reader dstream,
int startline, int startcolumn, int buffersize)
{
inputStream = dstream;
line = startline;
column = startcolumn - 1;
if (buffer == null || buffersize != buffer.length)
{
available = bufsize = buffersize;
buffer = new char[buffersize];
bufline = new int[buffersize];
bufcolumn = new int[buffersize];
nextCharBuf = new char[4096];
}
prevCharIsLF = prevCharIsCR = false;
tokenBegin = inBuf = maxNextCharInd = 0;
nextCharInd = bufpos = -1;
}
/* Reinitialise. */
public void ReInit(java.io.Reader dstream,
int startline, int startcolumn)
{
ReInit(dstream, startline, startcolumn, 4096);
}
/* Reinitialise. */
public void ReInit(java.io.Reader dstream)
{
ReInit(dstream, 1, 1, 4096);
}
/** Constructor. */
public JavaCharStream(java.io.InputStream dstream, String encoding, int startline,
int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
{
this(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);
}
/** Constructor.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
* @param buffersize size of the buffer
*/
public JavaCharStream(java.io.InputStream dstream, int startline,
int startcolumn, int buffersize)
{
this(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);
}
/** Constructor.
* @param dstream the underlying data source.
* @param encoding the character encoding of the data stream.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
* @throws UnsupportedEncodingException encoding is invalid or unsupported.
*/
public JavaCharStream(java.io.InputStream dstream, String encoding, int startline,
int startcolumn) throws java.io.UnsupportedEncodingException
{
this(dstream, encoding, startline, startcolumn, 4096);
}
/** Constructor.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
*/
public JavaCharStream(java.io.InputStream dstream, int startline,
int startcolumn)
{
this(dstream, startline, startcolumn, 4096);
}
/** Constructor.
* @param dstream the underlying data source.
* @param encoding the character encoding of the data stream.
* @throws UnsupportedEncodingException encoding is invalid or unsupported.
*/
public JavaCharStream(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException
{
this(dstream, encoding, 1, 1, 4096);
}
/** Constructor.
* @param dstream the underlying data source.
*/
public JavaCharStream(java.io.InputStream dstream)
{
this(dstream, 1, 1, 4096);
}
/** Reinitialise.
* @param dstream the underlying data source.
* @param encoding the character encoding of the data stream.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
* @param buffersize size of the buffer
*/
public void ReInit(java.io.InputStream dstream, String encoding, int startline,
int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
{
ReInit(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);
}
/** Reinitialise.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
* @param buffersize size of the buffer
*/
public void ReInit(java.io.InputStream dstream, int startline,
int startcolumn, int buffersize)
{
ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);
}
/** Reinitialise.
* @param dstream the underlying data source.
* @param encoding the character encoding of the data stream.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
* @throws UnsupportedEncodingException encoding is invalid or unsupported.
*/
public void ReInit(java.io.InputStream dstream, String encoding, int startline,
int startcolumn) throws java.io.UnsupportedEncodingException
{
ReInit(dstream, encoding, startline, startcolumn, 4096);
}
/** Reinitialise.
* @param dstream the underlying data source.
* @param startline line number of the first character of the stream, mostly for error messages.
* @param startcolumn column number of the first character of the stream.
*/
public void ReInit(java.io.InputStream dstream, int startline,
int startcolumn)
{
ReInit(dstream, startline, startcolumn, 4096);
}
/** Reinitialise.
* @param dstream the underlying data source.
* @param encoding the character encoding of the data stream.
* @throws UnsupportedEncodingException encoding is invalid or unsupported.
*/
public void ReInit(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException
{
ReInit(dstream, encoding, 1, 1, 4096);
}
/** Reinitialise.
* @param dstream the underlying data source.
*/
public void ReInit(java.io.InputStream dstream)
{
ReInit(dstream, 1, 1, 4096);
}
/** Get the token timage.
* @return token image as String */
public String GetImage()
{
if (bufpos >= tokenBegin)
return new String(buffer, tokenBegin, bufpos - tokenBegin + 1);
else
return new String(buffer, tokenBegin, bufsize - tokenBegin) +
new String(buffer, 0, bufpos + 1);
}
/** Get the suffix as an array of characters.
* @param len the length of the array to return.
* @return suffix */
public char[] GetSuffix(int len)
{
char[] ret = new char[len];
if ((bufpos + 1) >= len)
System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
else
{
System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
len - bufpos - 1);
System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
}
return ret;
}
/** Set buffers back to null when finished. */
public void Done()
{
nextCharBuf = null;
buffer = null;
bufline = null;
bufcolumn = null;
}
/**
* Method to adjust line and column numbers for the start of a token.
*
* @param newLine the new line number.
* @param newCol the new column number.
*/
public void adjustBeginLineColumn(int newLine, int newCol)
{
int start = tokenBegin;
int len;
if (bufpos >= tokenBegin)
{
len = bufpos - tokenBegin + inBuf + 1;
}
else
{
len = bufsize - tokenBegin + bufpos + 1 + inBuf;
}
int i = 0, j = 0, k = 0;
int nextColDiff = 0, columnDiff = 0;
while (i < len && bufline[j = start % bufsize] == bufline[k = ++start % bufsize])
{
bufline[j] = newLine;
nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
bufcolumn[j] = newCol + columnDiff;
columnDiff = nextColDiff;
i++;
}
if (i < len)
{
bufline[j] = newLine++;
bufcolumn[j] = newCol + columnDiff;
while (i++ < len)
{
if (bufline[j = start % bufsize] != bufline[++start % bufsize])
bufline[j] = newLine++;
else
bufline[j] = newLine;
}
}
line = bufline[j];
column = bufcolumn[j];
}
boolean getTrackLineColumn() { return trackLineColumn; }
void setTrackLineColumn(boolean tlc) { trackLineColumn = tlc; }
}
/* JavaCC - OriginalChecksum=90261a6802ec5f590b4ce923f759f884 (do not edit this line) */
© 2015 - 2025 Weber Informatics LLC | Privacy Policy