1 files changed, 159 insertions, 0 deletions
diff --git a/src/main/java/com/c2kernel/lookup/ItemPath.java b/src/main/java/com/c2kernel/lookup/ItemPath.java
new file mode 100644
index 0000000..17e5659
--- /dev/null
+++ b/src/main/java/com/c2kernel/lookup/ItemPath.java
@@ -0,0 +1,159 @@
+/**************************************************************************
+ * 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;
+    }
+}
+