/*license*\
XBN-Java: Copyright (C) 2014, Jeff Epstein (aliteralmind __DASH__ github __AT__ yahoo __DOT__ com)
This software is dual-licensed under the:
- Lesser General Public License (LGPL) version 3.0 or, at your option, any later version;
- Apache Software License (ASL) version 2.0.
Either license may be applied at your discretion. More information may be found at
- http://en.wikipedia.org/wiki/Multi-licensing.
The text of both licenses is available in the root directory of this project, under the names "LICENSE_lgpl-3.0.txt" and "LICENSE_asl-2.0.txt". The latest copies may be downloaded at:
- LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
- ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
\*license*/
package com.github.xbn.examples.linefilter;
import com.github.xbn.analyze.alter.AlterationRequired;
import com.github.xbn.linefilter.AdaptRegexReplacerTo;
import com.github.xbn.linefilter.FilteredLineIterator;
import com.github.xbn.linefilter.Returns;
import com.github.xbn.linefilter.alter.NewTextLineAltererFor;
import com.github.xbn.linefilter.alter.TextLineAlterer;
import com.github.xbn.linefilter.entity.BlockEntity;
import com.github.xbn.linefilter.entity.EndRequired;
import com.github.xbn.linefilter.entity.z.BlockEntity_Cfg;
import com.github.xbn.regexutil.IndirectRegexReplacer;
import com.github.xbn.regexutil.z.RegexReplacer_Cfg;
import com.github.xbn.text.StringUtil;
/**
<p>Demonstrates using {@link com.github.xbn.linefilter.FilteredLineIterator} to make arbitrary modifications to kept lines.</p>
<p>{@code java com.github.xbn.examples.linefilter.MoreComplicatedModifyExample}</p>
* @see <code><a href="{@docRoot}/com/github/xbn/linefilter/package-summary.html#xmpl_modify">{@docRoot}/com/github/xbn/linefilter/package-summary.html#xmpl_modify</a></code>
* @since 0.1.0
* @author Copyright (C) 2014, Jeff Epstein ({@code aliteralmind __DASH__ github __AT__ yahoo __DOT__ com}), dual-licensed under the LGPL (version 3.0 or later) or the ASL (version 2.0). See source code for details. <a href="http://xbnjava.aliteralmind.com">{@code http://xbnjava.aliteralmind.com}</a>, <a href="https://github.com/aliteralmind/xbnjava">{@code https://github.com/aliteralmind/xbnjava}</a>
**/
public class MoreComplicatedModifyExample {
public static final void main(String[] ignored) {
//Example setup
String LINE_SEP = System.getProperty("line.separator", "\r\n");
StringBuilder input = new StringBuilder().
append("before1" ).append(LINE_SEP).
append("before2" ).append(LINE_SEP).
append("Block starts here").append(LINE_SEP).
append("mid1" ).append(LINE_SEP).
append("mid2" ).append(LINE_SEP).
append("Block ends here" ).append(LINE_SEP).
append("after1" ).append(LINE_SEP).
append("after2" ).append(LINE_SEP);
//Example proper:
IndirectRegexReplacer replaceNumWithStrNum = new IndirectRegexReplacer(
new RegexReplacer_Cfg().findWhat("(.*)").first()) {
public String getIndirectReplacement() {
String match = getGroup(1);
String preNum = match.substring(0, match.length() - 1);
String numStr = new Character(match.charAt(match.length() - 1)).toString();
int num = Integer.parseInt(numStr);
switch(num) {
case 1: return preNum + "ONE";
case 2: return preNum + "TWO";
}
throw new IllegalStateException("Unknown number in match: \"" + match + "\"");
}
};
TextLineAlterer midAlterer = AdaptRegexReplacerTo.
lineReplacer(AlterationRequired.YES, replaceNumWithStrNum, null);
TextLineAlterer startIdOnly = NewTextLineAltererFor.
textValidateOnly("start", null,
null); //debug (on:System.out, off:null)
TextLineAlterer endIdOnly = NewTextLineAltererFor.
textValidateOnly("end", null,
null); //debug
BlockEntity block = new BlockEntity_Cfg("block").
startAlter(startIdOnly).midAlter(midAlterer).
endAlter(EndRequired.YES, endIdOnly).
keepMidsOnly().required(true).build();
FilteredLineIterator filteredItr = new FilteredLineIterator(
StringUtil.getLineIterator(input), Returns.KEPT,
null, null, //dbgEveryLine and its line-range
block);
while(filteredItr.hasNext()) {
System.out.println(filteredItr.next());
}
}
}