File	Doc	Category	Size	Date	Package
PrefixLines.java	API Doc	Apache Ant 1.70	4937	Wed Dec 13 06:16:20 GMT 2006	org.apache.tools.ant.filters

PrefixLines

• java.lang.Object
  • BaseParamFilterReader

<prefixlines prefix="Foo"/>

<filterreader classname="org.apache.tools.ant.filters.PrefixLines">
<param name="prefix" value="Foo"/>
</filterreader>

Fields Summary
private static final String	PREFIX_KEY Parameter name for the prefix.
private String	prefix The prefix to be used.
private String	queuedData Data that must be read from, if not null.

Constructors Summary
public PrefixLines() Constructor for "dummy" instances. see BaseFilterReader#BaseFilterReader() super();
public PrefixLines(Reader in) Creates a new filtered reader. param in A Reader object providing the underlying stream. Must not be null. super(in);

Methods Summary
public java.io.Reader	chain(java.io.Reader rdr) Creates a new PrefixLines filter using the passed in Reader for instantiation. param rdr A Reader object providing the underlying stream. Must not be null. return a new filter based on this configuration, but filtering the specified reader PrefixLines newFilter = new PrefixLines(rdr); newFilter.setPrefix(getPrefix()); newFilter.setInitialized(true); return newFilter;
private java.lang.String	getPrefix() Returns the prefix which will be added at the start of each input line. return the prefix which will be added at the start of each input line return prefix;
private void	initialize() Initializes the prefix if it is available from the parameters. Parameter[] params = getParameters(); if (params != null) { for (int i = 0; i < params.length; i++) { if (PREFIX_KEY.equals(params[i].getName())) { prefix = params[i].getValue(); break; } } }
public int	read() Returns the next character in the filtered stream. One line is read from the original input, and the prefix added. The resulting line is then used until it ends, at which point the next original line is read, etc. return the next character in the resulting stream, or -1 if the end of the resulting stream has been reached exception IOException if the underlying stream throws an IOException during reading if (!getInitialized()) { initialize(); setInitialized(true); } int ch = -1; if (queuedData != null && queuedData.length() == 0) { queuedData = null; } if (queuedData != null) { ch = queuedData.charAt(0); queuedData = queuedData.substring(1); if (queuedData.length() == 0) { queuedData = null; } } else { queuedData = readLine(); if (queuedData == null) { ch = -1; } else { if (prefix != null) { queuedData = prefix + queuedData; } return read(); } } return ch;
public void	setPrefix(java.lang.String prefix) Sets the prefix to add at the start of each input line. param prefix The prefix to add at the start of each input line. May be null, in which case no prefix is added. this.prefix = prefix;