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/**************************************************************************
* EntityPath.java
*
* $Revision: 1.14 $
* $Date: 2006/03/03 13:52:21 $
*
* Copyright (C) 2001 CERN - European Organization for Nuclear Research
* All rights reserved.
**************************************************************************/
package com.c2kernel.lookup;
import java.util.ArrayList;
import com.c2kernel.common.ObjectNotFoundException;
/**
* Extends Path to enforce SystemKey structure and support int form
*
* @version $Revision: 1.14 $ $Date: 2006/03/03 13:52:21 $
* @author $Author: abranson $
**/
public class ItemPath extends Path
{
// no of components in a syskey
public static final int elementNo = 3;
// no of digits in a syskey component
public static final int elementLen = 3;
// maximum possible int syskey
public static final int maxSysKey = (int)Math.pow(10, elementNo*elementLen)-1;
protected static String mTypeRoot;
/*
* From syskey int
* Note no EntityPath constructors allow setting of CONTEXT or ENTITY:
* The object decides that for itself from the number of components
*/
public ItemPath(int syskey) throws InvalidItemPathException {
super();
setSysKey(syskey);
}
/*
*/
public ItemPath()
{
super();
}
/*
*/
public ItemPath(String[] path) throws InvalidItemPathException
{
super(path, Path.CONTEXT); // dummy - it will get replaced in checkSysPath()
checkSysPath();
}
/*
*/
public ItemPath(String path) throws InvalidItemPathException
{
super(path, Path.CONTEXT);
checkSysPath();
}
/*
*/
public ItemPath(ItemPath parent, String child) throws InvalidItemPathException {
super(parent, child);
checkSysPath();
}
// EntityPaths root in /entity
@Override
public String getRoot() {
return "entity";
}
@Override
public ItemPath getEntity() throws ObjectNotFoundException {
return this;
}
public byte[] getOID() {
if (mSysKey == Path.INVALID) return null;
return String.valueOf(mSysKey).getBytes();
}
/*************************************************************************/
/** Returns int form of syskey (if possible)
*/
@Override
public int getSysKey() {
if (mSysKey == Path.INVALID && mType == Path.ENTITY)
try {
if (mPath.length != elementNo)
throw new InvalidItemPathException("Incorrect number of components for a system key");
mSysKey = 0;
for (String keypart : mPath) {
if (keypart.length()!=elementLen+1)
throw new InvalidItemPathException("Component '"+keypart+"' is not the correct size for a system key");
for(int j=1; j<elementLen+1; j++) // skip the 'd' prefix
{
char c = keypart.charAt(j);
if((c >= '0') && (c <='9'))
mSysKey = mSysKey*10 + c - '0';
else
throw new InvalidItemPathException("Component '"+keypart+"' contained a non-numeric char (excluding first char 'd').");
}
}
} catch (InvalidItemPathException ex) {
mSysKey = Path.INVALID;
}
return mSysKey;
}
/** Sets path from int syskey
*/
public void setSysKey(int sysKey) throws InvalidItemPathException
{
if (sysKey < 0 || sysKey > maxSysKey)
throw new InvalidItemPathException("System key "+sysKey+" out of range");
String stringPath = Integer.toString(sysKey);
ArrayList<String> newKey = new ArrayList<String>();
for (int i=0; i<elementNo; i++) {
StringBuffer nextComponent = new StringBuffer("d");
int start = stringPath.length()-elementLen;
if (start < 0) {
nextComponent.append("000000".substring(0,Math.abs(start))).append(stringPath);
stringPath = "";
}
else {
nextComponent.append(stringPath.substring(start));
stringPath = stringPath.substring(0, start);
}
newKey.add(0, nextComponent.toString());
}
mPath = (newKey.toArray(mPath));
mSysKey = sysKey;
mStringPath = null;
mType = Path.ENTITY;
checkSysPath();
}
public void checkSysPath() throws InvalidItemPathException {
if (mPath.length > elementNo)
throw new InvalidItemPathException("EntityPath cannot have more than "+elementNo+" components: "+toString());
if (mPath.length == elementNo)
mType = Path.ENTITY;
else
mType = Path.CONTEXT;
}
}
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