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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program 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 2 of the License, or (at your option)
* any later version.
*
* This program is 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 program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.util;
import proguard.util.*;
import java.io.PrintStream;
import java.util.List;
/**
* This class prints out and counts warnings.
*
* @author Eric Lafortune
*/
public class WarningPrinter
{
private final PrintStream printStream;
private final StringMatcher classFilter;
private int warningCount;
/**
* Creates a new WarningPrinter that prints to the System.err print stream.
*/
public WarningPrinter()
{
this(System.err);
}
/**
* Creates a new WarningPrinter that prints to the given print stream.
*/
public WarningPrinter(PrintStream printStream)
{
this.printStream = printStream;
this.classFilter = null;
}
/**
* Creates a new WarningPrinter that prints to the given print stream,
* except if the names of any involved classes matches the given filter.
*/
public WarningPrinter(PrintStream printStream, List classFilter)
{
this.printStream = printStream;
this.classFilter = classFilter == null ? null :
new ListParser(new ClassNameParser()).parse(classFilter);
}
/**
* Prints out the given warning and increments the warning count, if
* the given class name passes the class name filter.
*/
public void print(String className, String warning)
{
if (accepts(className))
{
print(warning);
}
}
/**
* Returns whether the given class name passes the class name filter.
*/
public boolean accepts(String className)
{
return classFilter == null ||
!classFilter.matches(className);
}
/**
* Prints out the given warning and increments the warning count, if
* the given class names pass the class name filter.
*/
public void print(String className1, String className2, String warning)
{
if (accepts(className1, className2))
{
print(warning);
}
}
/**
* Returns whether the given class names pass the class name filter.
*/
public boolean accepts(String className1, String className2)
{
return classFilter == null ||
!(classFilter.matches(className1) ||
classFilter.matches(className2));
}
/**
* Prints out the given warning and increments the warning count.
*/
private void print(String warning)
{
printStream.println(warning);
warningCount++;
}
/**
* Returns the number of warnings printed so far.
*/
public int getWarningCount()
{
return warningCount;
}
}
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