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org.apache.lucene.analysis.standard
public final class: FastCharStream [javadoc | source]

java.lang.Object
   org.apache.lucene.analysis.standard.FastCharStream

All Implemented Interfaces:
    CharStream

An efficient implementation of JavaCC's CharStream interface.

Note that this does not do line-number counting, but instead keeps track of the character position of the token in the input, as required by Lucene's org.apache.lucene.analysis.Token API.

Field Summary
char[]	buffer
int	bufferLength
int	bufferPosition
int	tokenStart
int	bufferStart
Reader	input

Constructor:
public FastCharStream(Reader r) { // source of chars input = r; } Constructs from a Reader.

Method from org.apache.lucene.analysis.standard.FastCharStream Summary:
BeginToken,   Done,   GetImage,   GetSuffix,   backup,   getBeginColumn,   getBeginLine,   getColumn,   getEndColumn,   getEndLine,   getLine,   readChar

Methods from java.lang.Object:
equals,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait

Method from org.apache.lucene.analysis.standard.FastCharStream Detail:
public final char BeginToken() throws IOException { tokenStart = bufferPosition; return readChar(); }
public final void Done() { try { input.close(); } catch (IOException e) { System.err.println("Caught: " + e + "; ignoring."); } }
public final String GetImage() { return new String(buffer, tokenStart, bufferPosition - tokenStart); }
public final char[] GetSuffix(int len) { char[] value = new char[len]; System.arraycopy(buffer, bufferPosition - len, value, 0, len); return value; }
public final void backup(int amount) { bufferPosition -= amount; }
public final int getBeginColumn() { return bufferStart + tokenStart; }
public final int getBeginLine() { return 1; }
public final int getColumn() { return bufferStart + bufferPosition; }
public final int getEndColumn() { return bufferStart + bufferPosition; }
public final int getEndLine() { return 1; }
public final int getLine() { return 1; }
public final char readChar() throws IOException { if (bufferPosition >= bufferLength) refill(); return buffer[bufferPosition++]; }