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/**
* Copyright (c) 2014, University of Warsaw
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package pl.edu.mimuw.cloudatlas.model;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map.Entry;
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
/**
* A zone management information object. This object is a single node in a zone hierarchy. It stores zone attributes as well as
* references to its father and sons in the tree.
*/
public class ZMI implements Cloneable {
public class NoSuchZoneException extends Exception {
public NoSuchZoneException(PathName path) {
super("No such zone: " + path);
}
}
private final AttributesMap attributes = new AttributesMap();
private final List<ZMI> sons = new ArrayList<ZMI>();
private ZMI father;
/**
* Creates a new ZMI with no father (the root zone) and empty sons list.
*/
public ZMI() {
this(null);
}
/**
* Creates a new ZMI with the specified node as a father and empty sons list. This method does not perform any
* operation on <code>father</code>. In particular, setting this object <code>father</code>'s son must be done
* separately.
*
* @param father the father of this ZMI
* @see #addSon(ZMI)
*/
public ZMI(ZMI father) {
this.father = father;
}
/**
* Gets the father of this ZMI.
*
* @return the father of this ZMI or <code>null</code> if this is the root zone
*/
public ZMI getFather() {
return father;
}
/**
* Sets or changes the father of this ZMI in the tree. This method does not perform any operation on
* <code>father</code>. In particular, setting this object as <code>father</code>'s son must be done separately.
*
* @param father a new father for this ZMI
* @see #addSon(ZMI)
*/
public void setFather(ZMI father) {
this.father = father;
}
public ZMI findDescendant(PathName path) throws NoSuchZoneException {
ZMI descendant = this;
for (String component : path.getComponents()) {
boolean foundNextSon = false;
for (ZMI son : descendant.getSons()) {
if (son.getAttributes().get("name").equals(new ValueString(component))) {
descendant = son;
foundNextSon = true;
break;
}
}
if (!foundNextSon) {
throw new NoSuchZoneException(path);
}
}
return descendant;
}
/**
* Gets the list of sons of this ZMI. Modifying a value in the returned list will cause an exception.
*
* @return the list of sons
*/
public List<ZMI> getSons() {
return Collections.unmodifiableList(sons);
}
/**
* Adds the specified ZMI to the list of sons of this ZMI. This method does not perform any operation on
* <code>son</code>. In particular, setting this object as <code>son</code>'s father must be done separately.
*
* @param son
* @see #ZMI(ZMI)
* @see #setFather(ZMI)
*/
public void addSon(ZMI son) {
sons.add(son);
}
/**
* Removes the specified ZMI from the list of sons of this ZMI. This method does not perform any operation on
* <code>son</code>. In particular, its father remains unchanged.
*
* @param son
* @see #setFather(ZMI)
*/
public void removeSon(ZMI son) {
sons.remove(son);
}
/**
* Gets a map of all the attributes stored in this ZMI.
*
* @return map of attributes
*/
public AttributesMap getAttributes() {
return attributes;
}
/**
* Prints recursively in a prefix order (starting from this ZMI) a whole tree with all the attributes.
*
* @param stream a destination stream
* @see #toString()
*/
public void printAttributes(PrintStream stream) {
for(Entry<Attribute, Value> entry : attributes)
stream.println(entry.getKey() + " : " + entry.getValue().getType() + " = " + entry.getValue());
System.out.println();
for(ZMI son : sons)
son.printAttributes(stream);
}
/**
* Creates an independent copy of a whole hierarchy. A returned ZMI has the same reference as father (but the
* father does not have a reference to it as a son). For the root zone, the copy is completely independent, since
* its father is <code>null</code>.
*
* @return a deep copy of this ZMI
*/
@Override
public ZMI clone() {
ZMI result = new ZMI(father);
result.attributes.add(attributes.clone());
for(ZMI son : sons) {
ZMI sonClone = son.clone();
result.sons.add(sonClone);
sonClone.father = result;
}
return result;
}
/**
* Prints a textual representation of this ZMI. It contains only attributes of this node.
*
* @return a textual representation of this object
* @see #printAttributes(PrintStream)
*/
@Override
public String toString() {
return attributes.toString();
}
/**
* Gets the PathName representing this zone.
*
* @return a <code>PathName</code> object representing this zone
*/
public PathName getPathName() {
String name = ((ValueString)getAttributes().get("name")).getValue();
return getFather() == null? PathName.ROOT : getFather().getPathName().levelDown(name);
}
public static ZMI deserialize(InputStream in) {
Kryo kryo = new Kryo();
Input kryoInput = new Input(in);
ZMI zmi = kryo.readObject(kryoInput, ZMI.class);
return zmi;
}
public void serialize(OutputStream out) {
Kryo kryo = new Kryo();
Output kryoOut = new Output(out);
kryo.writeObject(kryoOut, this);
kryoOut.flush();
}
}
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