bug 128650: comment 16: possible alternate implementation that shortens handles drastically ... not currently used.

asm/src/org/aspectj/asm/internal/OptimizedFullPathHandleProvider.java

@@ -0,0 +1,91 @@
+/* *******************************************************************
+ * Copyright (c) 2003 Contributors.
+ * All rights reserved. 
+ * This program and the accompanying materials are made available 
+ * under the terms of the Common Public License v1.0 
+ * which accompanies this distribution and is available at 
+ * http://www.eclipse.org/legal/cpl-v10.html 
+ *  
+ * Contributors: 
+ *     Mik Kersten     initial implementation 
+ * ******************************************************************/
+
+package org.aspectj.asm.internal;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.StringTokenizer;
+
+import org.aspectj.asm.AsmManager;
+import org.aspectj.asm.IElementHandleProvider;
+import org.aspectj.bridge.ISourceLocation;
+
+/**
+ * Not currently used - uses int keys rather than the full file path as the first part of the handle.
+ */
+public class OptimizedFullPathHandleProvider implements IElementHandleProvider {
+
+    static final String ID_DELIM = "|";
+    Map kToF = new HashMap();
+    int key = 1;
+    
+    private Integer getKey(String file) {
+    	Integer k = null;
+        if (kToF.values().contains(file)) {
+        	 Set keys = kToF.keySet();
+        	 for (Iterator iter = keys.iterator(); iter.hasNext() && k==null;) {
+				Integer element = (Integer) iter.next();
+				if (kToF.get(element).equals(file)) {
+					k = element;
+				}
+		 }
+        } else {
+        	 k = new Integer(key);
+        	 kToF.put(k,file);
+        	 key++;
+        }
+        return k;
+    }
+    
+    public String createHandleIdentifier(ISourceLocation location) {
+        StringBuffer sb = new StringBuffer();
+        String file = AsmManager.getDefault().getCanonicalFilePath(location.getSourceFile());
+   	 
+        sb.append(getKey(file).intValue());
+        sb.append(ID_DELIM);
+        sb.append(location.getLine());
+        sb.append(ID_DELIM);
+        sb.append(location.getColumn());
+        sb.append(ID_DELIM);
+        sb.append(location.getOffset());
+        return sb.toString();
+    }
+    
+    public String createHandleIdentifier(File sourceFile, int line,int column,int offset) {
+        StringBuffer sb = new StringBuffer();
+        sb.append(getKey(AsmManager.getDefault().getCanonicalFilePath(sourceFile)).intValue());
+        sb.append(ID_DELIM);
+        sb.append(line);
+        sb.append(ID_DELIM);
+        sb.append(column);
+        sb.append(ID_DELIM);
+        sb.append(offset);
+        return sb.toString();       
+    }
+
+    public String getFileForHandle(String handle) {
+        StringTokenizer st = new StringTokenizer(handle, ID_DELIM);
+        String k = st.nextToken();
+        return (String)kToF.get(new Integer(k));
+//        return file;
+    }
+
+    public int getLineNumberForHandle(String handle) {
+        StringTokenizer st = new StringTokenizer(handle, ID_DELIM);
+        st.nextToken(); // skip over the file
+        return new Integer(st.nextToken()).intValue();
+    }
+}