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/**************************************************************************
* Path.java
*
* $Revision: 1.27 $
* $Date: 2006/01/17 07:49:58 $
*
* Copyright (C) 2001 CERN - European Organization for Nuclear Research
* All rights reserved.
**************************************************************************/
package com.c2kernel.lookup;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.util.UUID;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.common.SystemKey;
import com.c2kernel.process.Gateway;
/**
*
**/
public abstract class Path implements Serializable
{
public static final String delim = "/";
// types
public static final short UNKNOWN = 0;
public static final short CONTEXT = 1;
public static final short ENTITY = 2;
protected String[] mPath = new String[0];
// slash delimited path
protected String mStringPath = null;
// entity or context
protected short mType = CONTEXT;
// item UUID (only valid for ItemPaths and DomainPaths that are aliases for Items)
protected UUID mUUID;
protected SystemKey mSysKey;
// ior is stored in here when it is resolved
protected org.omg.CORBA.Object mIOR = null;
public Path() {
}
/*
* Creates an empty path
*/
public Path(short type)
{
mType = type;
}
/*
* Creates a path with an arraylist of the path (big endian)
*/
public Path(String[] path, short type) {
setPath(path);
mType = type;
}
/*
* Creates a path from a slash separated string (big endian)
*/
public Path(String path, short type) {
setPath(path);
mType = type;
}
/*
* Create a path by appending a child string to an existing path
*/
public Path(Path parent, String child, short type) {
String[] oldPath = parent.getPath();
mPath = new String[oldPath.length+1];
for (int i=0; i<oldPath.length; i++)
mPath[i] = oldPath[i];
mPath[oldPath.length] = child;
mType = type;
}
/*
* Create a path by appending a child and inheriting the type
*/
public Path(Path parent, String child) {
this(parent, child, UNKNOWN);
}
/*************************************************************************/
// Setters
/* string array path e.g. { "Product", "Crystal", "Barrel", "2L", "331013013348" }
* system/domain node ABSENT
*/
public void setPath(String[] path)
{
mStringPath = null;
mPath = path.clone();
mUUID = null;
mSysKey = null;
}
/* string path e.g. /system/d000/d000/d001
* system/domain node PRESENT
*/
public void setPath(String path)
{
ArrayList<String> newPath = new ArrayList<String>();
if (path != null) {
StringTokenizer tok = new StringTokenizer(path, delim);
if (tok.hasMoreTokens()) {
String first = tok.nextToken();
if (!first.equals(getRoot()))
newPath.add(first);
while (tok.hasMoreTokens())
newPath.add(tok.nextToken());
}
}
mPath = (newPath.toArray(mPath));
mStringPath = null;
mUUID = null;
mSysKey = null;
}
// lookup sets the IOR
public void setIOR(org.omg.CORBA.Object IOR) {
mIOR = IOR;
if (IOR == null) mType = Path.CONTEXT;
else mType = Path.ENTITY;
}
/* clone another path object
*/
public void setPath(Path path)
{
mStringPath = null;
mPath = (path.getPath().clone());
mUUID = null;
mSysKey = null;
}
/*************************************************************************/
/*
* Getter Methods
*/
// root is defined as 'domain', 'entity' or 'system' in subclasses
public abstract String getRoot();
public String[] getPath()
{
return mPath;
}
public String getString()
{
if (mStringPath == null) {
StringBuffer stringPathBuffer = new StringBuffer("/").append(getRoot());
for (String element : mPath)
stringPathBuffer.append(delim).append(element);
mStringPath = stringPathBuffer.toString();
}
return mStringPath;
}
public boolean exists() {
return Gateway.getLookup().exists(this);
}
/** Queries the lookup for the IOR
*/
public org.omg.CORBA.Object getIOR() {
org.omg.CORBA.Object newIOR = null;
if (mIOR==null) { // if not cached try to resolve
Lookup myLookup = Gateway.getLookup();
try {
newIOR = myLookup.resolve(this);
} catch (ObjectNotFoundException ex) {
}
setIOR(newIOR);
}
return mIOR;
}
@Override
public String toString() {
return getString();
}
public short getType() {
return mType;
}
public SystemKey getSystemKey() {
return mSysKey;
}
public UUID getUUID() {
return mUUID;
}
public abstract ItemPath getItemPath() throws ObjectNotFoundException;
@Override
public boolean equals( Object path )
{
if (path == null) return false;
return toString().equals(path.toString());
}
@Override
public int hashCode() {
return toString().hashCode();
}
public String dump() {
StringBuffer comp = new StringBuffer("Components: { ");
for (String element : mPath)
comp.append("'").append(element).append("' ");
return "Path - dump(): "+comp.toString()+"}\n string="+toString()+"\n uuid="+getUUID()+"\n type="+mType;
}
}
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