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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2011 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.io;
import proguard.classfile.ClassConstants;
import java.io.IOException;
import java.util.Map;
/**
* This DataEntryReader delegates to another DataEntryReader, renaming the
* data entries based on the given map. Entries whose name does not appear
* in the map may be passed to an alternative DataEntryReader.
*
* @author Eric Lafortune
*/
public class DataEntryRenamer implements DataEntryReader
{
private final Map nameMap;
private final DataEntryReader renamedDataEntryReader;
private final DataEntryReader missingDataEntryReader;
/**
* Creates a new DataEntryRenamer.
* @param nameMap the map from old names to new names.
* @param renamedDataEntryReader the DataEntryReader to which renamed data
* entries will be passed.
*/
public DataEntryRenamer(Map nameMap,
DataEntryReader renamedDataEntryReader)
{
this(nameMap, renamedDataEntryReader, null);
}
/**
* Creates a new DataEntryRenamer.
* @param nameMap the map from old names to new names.
* @param renamedDataEntryReader the DataEntryReader to which renamed data
* entries will be passed.
* @param missingDataEntryReader the optional DataEntryReader to which data
* entries that can't be renamed will be
* passed.
*/
public DataEntryRenamer(Map nameMap,
DataEntryReader renamedDataEntryReader,
DataEntryReader missingDataEntryReader)
{
this.nameMap = nameMap;
this.renamedDataEntryReader = renamedDataEntryReader;
this.missingDataEntryReader = missingDataEntryReader;
}
// Implementations for DataEntryReader.
public void read(DataEntry dataEntry) throws IOException
{
String name = dataEntry.getName();
// Add a directory separator if necessary.
if (dataEntry.isDirectory() &&
name.length() > 0)
{
name += ClassConstants.INTERNAL_PACKAGE_SEPARATOR;
}
String newName = (String)nameMap.get(name);
if (newName != null)
{
// Remove the directory separator if necessary.
if (dataEntry.isDirectory() &&
newName.length() > 0)
{
newName = newName.substring(0, newName.length() - 1);
}
renamedDataEntryReader.read(new RenamedDataEntry(dataEntry, newName));
}
else if (missingDataEntryReader != null)
{
missingDataEntryReader.read(dataEntry);
}
}
}
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