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/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * 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.*;
import proguard.util.MultiValueMap;

import java.util.*;

import static proguard.classfile.util.ClassUtil.internalClassName;


/**
 * Map keeping track of all data entries that have associated extra data entries with them.
 *
 * It also supports extra data entries that are not attached to a particular data entry: these entries should always
 * be included in the output, independent of the contents of the output.
 *
 * @author Johan Leys
 */
public class ExtraDataEntryNameMap
{
    private final MultiValueMap nameMap = new MultiValueMap();


    /**
     * Clears all extra data entries.
     */
    public void clear()
    {
        nameMap.clear();
    }


    /**
     * Clears all extra class data entries.
     */
    public void clearExtraClasses()
    {
        for (String dataEntryKey : nameMap.keySet())
        {
            for (String dataEntryValue : new ArrayList(nameMap.get(dataEntryKey)))
            {
                if (dataEntryValue.endsWith(ClassConstants.CLASS_FILE_EXTENSION))
                {
                    nameMap.remove(dataEntryKey, dataEntryValue);
                }
            }
        }
    }


    /**
     * Adds an extra data entry that is not linked to a particular data entry.
     */
    public void addExtraDataEntry(String extraDataEntryName)
    {
        nameMap.put(null, extraDataEntryName);
    }


    /**
     * Adds an extra class data entry that is not linked to a particular data entry.
     */
    public void addExtraClass(String extraDataEntryName)
    {
        addExtraDataEntry(getClassDataEntryName(extraDataEntryName));
    }


    /**
     * Adds an extra data entry to the given data entry.
     */
    public void addExtraDataEntry(String keyDataEntryName,
                                  String extraDataEntryName)
    {
        nameMap.put(keyDataEntryName, extraDataEntryName);
    }


    /**
     * Registers an extra data entry to the given class data entry.
     */
    public void addExtraDataEntryToClass(String keyClassName,
                                         String extraDataEntryName)
    {
        addExtraDataEntry(getClassDataEntryName(keyClassName),
                          extraDataEntryName);
    }


    /**
     * Registers an extra class data entry to the given class data entry.
     */
    public void addExtraClassToClass(Clazz keyClass,
                                     Clazz extraClass)
    {
        addExtraDataEntry(getClassDataEntryName(keyClass),
                          getClassDataEntryName(extraClass));
    }


    /**
     * Registers an extra class data entry to the given class data entry.
     */
    public void addExtraClassToClass(Clazz keyClass,
                                     Class extraClass)
    {
        addExtraDataEntry(getClassDataEntryName(keyClass),
                          getClassDataEntryName(extraClass));
    }


    /**
     * Registers an extra class data entry to the given class data entry.
     */
    public void addExtraClassToClass(Clazz  keyClass,
                                     String extraClassName)
    {
        addExtraDataEntry(getClassDataEntryName(keyClass),
                          getClassDataEntryName(extraClassName));
    }


    /**
     * Registers an extra class data entry to the given class data entry.
     */
    public void addExtraClassToClass(String keyClassName,
                                     Class  extraClass)
    {
        addExtraDataEntry(getClassDataEntryName(keyClassName),
                          getClassDataEntryName(extraClass));
    }


    /**
     * Registers an extra class data entry to the given class data entry.
     */
    public void addExtraClassToClass(String keyClassName,
                                     String extraClassName)
    {
        addExtraDataEntry(getClassDataEntryName(keyClassName),
                          getClassDataEntryName(extraClassName));
    }


    /**
     * Returns the names of all data entries that have extra data entries attached to them.
     */
    public Set getKeyDataEntryNames()
    {
        return nameMap.keySet();
    }


    /**
     * Returns the names of all extra data entries.
     */
    public Set getAllExtraDataEntryNames()
    {
        return nameMap.getValues();
    }


    /**
     * Returns the names of all extra data entries that are not attached to a particular data entry.
     */
    public Set getDefaultExtraDataEntryNames()
    {
        return nameMap.get(null);
    }


    /**
     * Returns the names of all extra data entries attached to the given data entry.
     */
    public Set getExtraDataEntryNames(String keyDataEntryName)
    {
        return nameMap.get(keyDataEntryName);
    }


    // Small utility methods.

    private String getClassDataEntryName(Clazz clazz)
    {
        return clazz.getName() + ClassConstants.CLASS_FILE_EXTENSION;
    }


    private String getClassDataEntryName(Class clazz)
    {
        return internalClassName(clazz.getName()) + ClassConstants.CLASS_FILE_EXTENSION;
    }


    public String getClassDataEntryName(String className)
    {
        return className + ClassConstants.CLASS_FILE_EXTENSION;
    }
}