1 files changed, 143 insertions, 143 deletions
diff --git a/src/pl/edu/mimuw/cloudatlas/model/PathName.java b/src/pl/edu/mimuw/cloudatlas/model/PathName.java
index c5ef4e8..ba1a931 100644
--- a/src/pl/edu/mimuw/cloudatlas/model/PathName.java
+++ b/src/pl/edu/mimuw/cloudatlas/model/PathName.java
@@ -34,147 +34,147 @@ import java.util.List;
  * Represent a fully qualified name of a zone, also known as a global name or a path name. This class is immutable.
  */
 public class PathName {
-	/**
-	 * The object representing a name of the root zone (/).
-	 */
-	public static final PathName ROOT = new PathName("/");
-	
-	private final List<String> components;
-	private final String name;
-	
-	/**
-	 * Creates a <code>PathName</code> object representing the specified path. For the root zone, there are three
-	 * accepted forms: <code>null</code> reference, empty string or slash. Any other zone is represented by a string
-	 * starting with slash and containing names of zones at each level of hierarchy, separated by slashes. Zone name
-	 * must contain only letters and digits.
-	 * 
-	 * @param name path name of a zone, for instance: <code>/warsaw/uw/violet07</code>
-	 * @throws IllegalArgumentException if the <code>name</code> is incorrect
-	 */
-	public PathName(String name) {
-		// we accept null and "/" as names of a root zone, however, we convert all of them to ""
-		name = name == null || name.equals("/")? "" : name.trim();
-		if(!name.matches("(/\\w+)*"))
-			throw new IllegalArgumentException("Incorrect fully qualified name: " + name + ".");
-		this.name = name;
-		components = name.equals("")? new ArrayList<String>() : Arrays.asList(name.substring(1).split("/"));
-	}
-	
-	/**
-	 * Creates a <code>PathName</code> object from a collection of zones names. Every zone name must contain only
-	 * letters and digits.
-	 * 
-	 * @param components a collection of zones names at subsequent levels of hierarchy (starting from root); empty
-	 * collection represents the root zone
-	 * @throws IllegalArgumentException if any zone name is incorrect
-	 */
-	public PathName(Collection<String> components) {
-		this.components = new ArrayList<String>(components);
-		if(components.isEmpty())
-			this.name = "";
-		else {
-			String currentName = "";
-			for(String c : components) {
-				currentName += "/" + c;
-				if(!c.matches("\\w+"))
-					throw new IllegalArgumentException("Incorrect component " + c + ".");
-			}
-			this.name = currentName;
-		}
-	}
-	
-	/**
-	 * Gets zones names at subsequent levels of hierarchy, starting from root. For the root zone, this method returns an
-	 * empty collection. Modifying returned list will throw an exception.
-	 * 
-	 * @return a collection of zones names
-	 */
-	public List<String> getComponents() {
-		return Collections.unmodifiableList(components);
-	}
-	
-	/**
-	 * Gets a full path name. For the root zone, this method returns an empty string.
-	 * 
-	 * @return a path name represented by this object
-	 * @see #toString()
-	 */
-	public String getName() {
-		return name;
-	}
-	
-	/**
-	 * Gets a name one level up in a hierarchy. For the root zone, this method returns a new instance of the same zone.
-	 * 
-	 * @return a new <code>PathName</code> object representing a zone one level up in the hierarchy
-	 */
-	public PathName levelUp() {
-		List<String> componentsUp = new ArrayList<String>(components);
-		if(!componentsUp.isEmpty())
-			componentsUp.remove(componentsUp.size() - 1);
-		return new PathName(componentsUp);
-	}
-	
-	/**
-	 * Gets a name one level down in a hierarchy.
-	 * 
-	 * @param son zone name at a lower level
-	 * @return a new <code>PathName</code> object representing a zone one level down in the hierarchy
-	 */
-	public PathName levelDown(String son) {
-		return new PathName(name + "/" + son);
-	}
-	
-	/**
-	 * Gets a zone name at the lowest level (highest number) in a hierarchy.
-	 * 
-	 * @return a leaf zone
-	 * @throws UnsupportedOperationException if this object represents the root zone
-	 */
-	public String getSingletonName() {
-		try {
-			return components.get(components.size() - 1);
-		} catch(IndexOutOfBoundsException exception) {
-			throw new UnsupportedOperationException("getSingletonName() is not supported for the root zone.");
-		}
-	}
-	
-	/**
-	 * Returns a hash code value for this object. This method returns a hash code of a string representing full path
-	 * name.
-	 * 
-	 * @return a hash code for this object
-	 */
-	@Override
-	public int hashCode() {
-		return name.hashCode();
-	}
-	
-	/**
-	 * Indicates whether this object is equal to another. A <code>PathName</code> object is equal to other objects of
-	 * the same class representing identical path name.
-	 * 
-	 * @object the object to check
-	 * @return whether the <code>object</code> is equal to this name
-	 */
-	@Override
-	public boolean equals(Object object) {
-		if(object == null)
-			return false;
-		if(getClass() != object.getClass())
-			return false;
-		return name.equals(((PathName)object).name);
-	}
-	
-	/**
-	 * Returns a textual representation for this <code>PathName</code>. For the root zone, unlike {@link #getName()},
-	 * this method returns slash.
-	 * 
-	 * @return a path name for this object
-	 * @see #getName()
-	 */
-	@Override
-	public String toString() {
-		return name.equals("")? "/" : getName();
-	}
+    /**
+     * The object representing a name of the root zone (/).
+     */
+    public static final PathName ROOT = new PathName("/");
+
+    private final List<String> components;
+    private final String name;
+
+    /**
+     * Creates a <code>PathName</code> object representing the specified path. For the root zone, there are three
+     * accepted forms: <code>null</code> reference, empty string or slash. Any other zone is represented by a string
+     * starting with slash and containing names of zones at each level of hierarchy, separated by slashes. Zone name
+     * must contain only letters and digits.
+     *
+     * @param name path name of a zone, for instance: <code>/warsaw/uw/violet07</code>
+     * @throws IllegalArgumentException if the <code>name</code> is incorrect
+     */
+    public PathName(String name) {
+        // we accept null and "/" as names of a root zone, however, we convert all of them to ""
+        name = name == null || name.equals("/")? "" : name.trim();
+        if(!name.matches("(/\\w+)*"))
+            throw new IllegalArgumentException("Incorrect fully qualified name: " + name + ".");
+        this.name = name;
+        components = name.equals("")? new ArrayList<String>() : Arrays.asList(name.substring(1).split("/"));
+    }
+
+    /**
+     * Creates a <code>PathName</code> object from a collection of zones names. Every zone name must contain only
+     * letters and digits.
+     *
+     * @param components a collection of zones names at subsequent levels of hierarchy (starting from root); empty
+     * collection represents the root zone
+     * @throws IllegalArgumentException if any zone name is incorrect
+     */
+    public PathName(Collection<String> components) {
+        this.components = new ArrayList<String>(components);
+        if(components.isEmpty())
+            this.name = "";
+        else {
+            String currentName = "";
+            for(String c : components) {
+                currentName += "/" + c;
+                if(!c.matches("\\w+"))
+                    throw new IllegalArgumentException("Incorrect component " + c + ".");
+            }
+            this.name = currentName;
+        }
+    }
+
+    /**
+     * Gets zones names at subsequent levels of hierarchy, starting from root. For the root zone, this method returns an
+     * empty collection. Modifying returned list will throw an exception.
+     *
+     * @return a collection of zones names
+     */
+    public List<String> getComponents() {
+        return Collections.unmodifiableList(components);
+    }
+
+    /**
+     * Gets a full path name. For the root zone, this method returns an empty string.
+     *
+     * @return a path name represented by this object
+     * @see #toString()
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Gets a name one level up in a hierarchy. For the root zone, this method returns a new instance of the same zone.
+     *
+     * @return a new <code>PathName</code> object representing a zone one level up in the hierarchy
+     */
+    public PathName levelUp() {
+        List<String> componentsUp = new ArrayList<String>(components);
+        if(!componentsUp.isEmpty())
+            componentsUp.remove(componentsUp.size() - 1);
+        return new PathName(componentsUp);
+    }
+
+    /**
+     * Gets a name one level down in a hierarchy.
+     *
+     * @param son zone name at a lower level
+     * @return a new <code>PathName</code> object representing a zone one level down in the hierarchy
+     */
+    public PathName levelDown(String son) {
+        return new PathName(name + "/" + son);
+    }
+
+    /**
+     * Gets a zone name at the lowest level (highest number) in a hierarchy.
+     *
+     * @return a leaf zone
+     * @throws UnsupportedOperationException if this object represents the root zone
+     */
+    public String getSingletonName() {
+        try {
+            return components.get(components.size() - 1);
+        } catch(IndexOutOfBoundsException exception) {
+            throw new UnsupportedOperationException("getSingletonName() is not supported for the root zone.");
+        }
+    }
+
+    /**
+     * Returns a hash code value for this object. This method returns a hash code of a string representing full path
+     * name.
+     *
+     * @return a hash code for this object
+     */
+    @Override
+    public int hashCode() {
+        return name.hashCode();
+    }
+
+    /**
+     * Indicates whether this object is equal to another. A <code>PathName</code> object is equal to other objects of
+     * the same class representing identical path name.
+     *
+     * @object the object to check
+     * @return whether the <code>object</code> is equal to this name
+     */
+    @Override
+    public boolean equals(Object object) {
+        if(object == null)
+            return false;
+        if(getClass() != object.getClass())
+            return false;
+        return name.equals(((PathName)object).name);
+    }
+
+    /**
+     * Returns a textual representation for this <code>PathName</code>. For the root zone, unlike {@link #getName()},
+     * this method returns slash.
+     *
+     * @return a path name for this object
+     * @see #getName()
+     */
+    @Override
+    public String toString() {
+        return name.equals("")? "/" : getName();
+    }
 }