org.hawkular.alerts.engine.util

Class TokenReplacingReader

java.lang.Object

java.io.Reader

org.hawkular.alerts.engine.util.TokenReplacingReader

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public class TokenReplacingReader
extends Reader

Copied from http://tutorials.jenkov.com/java-howto/replace-strings-in-streams-arrays-files.html with fixes to read(char[], int, int) and added support for escaping.

The following constructs have been added:

• ${p:v} if token p is not found in the backing map, the provided value v is used instead of keeping the literal "${p}" in the output.
• ${p1,p2:v} if token p1 is not found in the backing map, the expression is replaced by the value of token p2 or value v if p2 is not present either.

Author:

Lukas Krejci

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor and Description
TokenReplacingReader(String source, Map<String,String> tokens)
TokenReplacingReader(String source, Map<String,String> tokens, Deque<String> activeTokens, Map<String,String> resolvedTokens)

Method Summary

Modifier and Type	Method and Description
void	close()
void	mark(int readAheadLimit)
boolean	markSupported()
int	read()
int	read(char[] cbuf)
int	read(char[] cbuf, int off, int len)
int	read(CharBuffer target)
boolean	ready()
void	reset()
long	skip(long n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TokenReplacingReader

public TokenReplacingReader(String source,
                            Map<String,String> tokens)

TokenReplacingReader

public TokenReplacingReader(String source,
                            Map<String,String> tokens,
                            Deque<String> activeTokens,
                            Map<String,String> resolvedTokens)

Method Detail

read

public int read(CharBuffer target)
         throws IOException

Specified by:

read in interface Readable

Overrides:

read in class Reader

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class Reader

Throws:

IOException

read

public int read(char[] cbuf)
         throws IOException

Overrides:

read in class Reader

Throws:

IOException

read

public int read(char[] cbuf,
                int off,
                int len)
         throws IOException

Specified by:

read in class Reader

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class Reader

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class Reader

Throws:

IOException

ready

public boolean ready()
              throws IOException

Overrides:

ready in class Reader

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class Reader

mark

public void mark(int readAheadLimit)
          throws IOException

Overrides:

mark in class Reader

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class Reader

Throws:

IOException