net.sourceforge.plantuml.preproc.Preprocessor Maven / Gradle / Ivy
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PlantUML is a component that allows to quickly write :
* sequence diagram,
* use case diagram,
* class diagram,
* activity diagram,
* component diagram,
* state diagram
* object diagram
/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2013, Arnaud Roques
*
* Project Info: http://plantuml.sourceforge.net
*
* This file is part of PlantUML.
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PlantUML distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* Original Author: Arnaud Roques
*
* Revision $Revision: 9911 $
*
*/
package net.sourceforge.plantuml.preproc;
import java.io.File;
import java.io.IOException;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Preprocessor implements ReadLine {
private static final Pattern definePattern = Pattern.compile("^\\s*!define\\s+([A-Za-z_][A-Za-z_0-9]*(?:\\([A-Za-z_][A-Za-z_0-9]*\\))?)(?:\\s+(.*))?$");
private static final Pattern undefPattern = Pattern.compile("^\\s*!undef\\s+([A-Za-z_][A-Za-z_0-9]*)$");
private final Defines defines;
private final PreprocessorInclude rawSource;
private final IfManager source;
public Preprocessor(ReadLine reader, String charset, Defines defines, Set filesUsed, File newCurrentDir) {
this.defines = defines;
this.rawSource = new PreprocessorInclude(reader, charset, filesUsed, newCurrentDir);
this.source = new IfManager(rawSource, defines);
}
public String readLine() throws IOException {
String s = source.readLine();
if (s == null) {
return null;
}
Matcher m = definePattern.matcher(s);
if (m.find()) {
return manageDefine(m);
}
m = undefPattern.matcher(s);
if (m.find()) {
return manageUndef(m);
}
s = defines.applyDefines(s);
return s;
}
private String manageUndef(Matcher m) throws IOException {
defines.undefine(m.group(1));
return this.readLine();
}
private String manageDefine(Matcher m) throws IOException {
defines.define(m.group(1), m.group(2));
return this.readLine();
}
public int getLineNumber() {
return rawSource.getLineNumber();
}
public void close() throws IOException {
rawSource.close();
}
}