// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.changemanagement;

import org.litesoft.changemanagement.nonpublic.*;
import org.litesoft.commonfoundation.base.*;

import java.io.*;
import java.util.*;

@SuppressWarnings("UnusedDeclaration")
public class ServerStateChangeCollector implements IServerStateChangeSet {
    protected Serializable mSourceUniqueID;
    protected String mSourceClassname;
    protected Map<String, Serializable> mXtraData;
    protected List<ServerStateChange> mChanges = new ArrayList<ServerStateChange>();

    protected ServerStateChangeCollector( Serializable pSourceUniqueID, String pSourceClassname, Map<String, Serializable> pXtraData ) {
        Confirm.isNotNull( "SourceUniqueID", mSourceUniqueID = pSourceUniqueID );
        mSourceClassname = pSourceClassname;
        Confirm.isNotNull( "XtraData", mXtraData = pXtraData );
    }

    public ServerStateChangeCollector( Serializable pSourceUniqueID ) {
        this( pSourceUniqueID, null, new HashMap<String, Serializable>() );
    }

    @Override
    public Serializable getSourceUniqueID() {
        return mSourceUniqueID;
    }

    @Override
    public String getSourceClassname() {
        return mSourceClassname;
    }

    public ServerStateChangeCollector setSourceClassname( String pSourceClassname ) {
        mSourceClassname = pSourceClassname;
        return this;
    }

    @Override
    public Serializable getXtraData( Class pForKey ) {
        return (pForKey == null) ? null : mXtraData.get( pForKey.getName() );
    }

    public ServerStateChangeCollector setXtraData( Class pForKey, Serializable pData ) {
        if ( pForKey != null ) {
            if ( pData == null ) {
                mXtraData.remove( pForKey.getName() );
            } else {
                mXtraData.put( pForKey.getName(), pData );
            }
        }
        return this;
    }

    @Override
    public List<ServerStateChange> getChanges() {
        return Collections.unmodifiableList( mChanges );
    }

    public ServerStateChangeCollector add( ServerStateChange pServerStateChange ) {
        if ( pServerStateChange != null ) {
            mChanges.add( pServerStateChange );
        }
        return this;
    }

    public boolean isNotEmpty() {
        return !mChanges.isEmpty();
    }

    public ServerStateChangeSet createSet() {
        return isNotEmpty() ? new ServerStateChangeSet( this ) : null;
    }

    @Override
    public String toString() {
        return Helper.toString( mSourceUniqueID, mSourceClassname, mXtraData, mChanges );
    }
}