org.fife.rsta.ac.java.buildpath.ClassEnumerationReader Maven / Gradle / Ivy
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A library adding code completion and other advanced features for Java, JavaScript, Perl, and other languages to RSyntaxTextArea.
/*
* 04/21/2012
*
* Copyright (C) 2010 Robert Futrell
* robert_futrell at users.sourceforge.net
* http://fifesoft.com/rsyntaxtextarea
*
* This library is distributed under a modified BSD license. See the included
* RSTALanguageSupport.License.txt file for details.
*/
package org.fife.rsta.ac.java.buildpath;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/**
* Reads plain text files enumerating classes to take from the classpath and
* add to a {@link ClasspathLibraryInfo}. Files should have a format similar
* to the following:
*
*
* - com.mycompany.pkg1.Class1
* Class2
* Class3
* - com.mycompany.pkg2.Foo
* Bar
* - aonther.pkg.Utils
* ...
*
*
* Such files are expected to be UTF-8. The exact file structure is as follows:
*
* - Lines that start with a "
-" denote a fully-qualified
* class, interface, or enum name.
* - Lines following a line starting with "
-" are simply a
* class, interface, or enum name, and are assumed to be in the same
* package as the previous class on the "-" line.
* - Blank lines and lines starting with "
#" are ignored.
*
*
* @author Robert Futrell
* @version 1.0
*/
public class ClassEnumerationReader {
/**
* Private constructor to prevent instantiation.
*/
private ClassEnumerationReader() {
}
/**
* Returns the list of classes specified in the given stream.
*
* @param in The input stream to read from. This will be closed when
* this method returns.
* @return The list of class names read.
* @throws IOException If an IO error occurs.
*/
public static List getClassNames(InputStream in) throws IOException {
String lastPkg = null;
String line = null;
List classNames = new ArrayList();
BufferedReader r = new BufferedReader(new InputStreamReader(in, "UTF-8"));
try {
while ((line=r.readLine())!=null) {
// Skip blank lines and comments
line = line.trim();
if (line.length()==0 || line.charAt(0)=='#') {
continue;
}
// A new fully-qualified class name
if (line.charAt(0)=='-') {
line = line.substring(1).trim();
classNames.add(line);
int lastDot = line.lastIndexOf('.');
lastPkg = line.substring(0, lastDot+1);
}
// Just a class name
else {
String className = line;
if (lastPkg!=null) {
className = lastPkg + className;
}
classNames.add(className);
}
}
} finally {
r.close();
}
return classNames;
}
}