/*
 * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the Classpath exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.sun.btrace.comm;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

/**
 * A data command that hold data of type Map<String, String>.
 * 
 * @author A. Sundararajan
 */
public class StringMapDataCommand extends DataCommand {

    private Map<String, String> data;

    public StringMapDataCommand() {
        this(null, null);
    }

    public StringMapDataCommand(String name, Map<String, String> data) {
        super(STRING_MAP, name);
        this.data = (data != null)? new HashMap(data) : data;
    }
    
    public Map<String, String> getData() {
        return data;
    }

    @Override
    public void print(PrintWriter out) {
        if (name != null && !name.isEmpty()) {
            out.println(name);
        }
        if (data != null) {
            for (Map.Entry<String, String> e : data.entrySet()) {
                out.print(e.getKey());
                out.print(" = ");
                out.println(e.getValue());
            }
        }
    }
    
    @Override
    protected void write(ObjectOutput out) throws IOException {
        out.writeUTF(name != null ? name : "");
        if (data != null) {
            out.writeInt(data.size());
            for (String key : data.keySet()) {
                out.writeUTF(key);
                out.writeUTF(data.get(key));
            }
        } else {
            out.writeInt(0);
        }
    }

    @Override
    protected void read(ObjectInput in)
            throws IOException, ClassNotFoundException {
        name = in.readUTF();
        data = new HashMap<String, String>();
        int sz = in.readInt();
        for (int i = 0; i < sz; i++) {
            data.put(in.readUTF(), (String) in.readUTF());
        }
    }
}