/*
 * 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 org.openjdk.btrace.core.comm;

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

/**
 * A data command that hold data of type Map&lt;String, String&gt;.
 *
 * @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, false);
    if (data != null) {
      this.data = new HashMap<>(data);
    } else {
      this.data = Collections.emptyMap();
    }
  }

  public Map<String, String> getData() {
    return data;
  }

  @Override
  public void print(PrintWriter out) {
    if (name != null && !name.isEmpty()) {
      out.println(name);
    }
    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 : "");
    out.writeInt(data.size());
    for (String key : data.keySet()) {
      out.writeUTF(key);
      out.writeUTF(data.get(key));
    }
  }

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