Add native method stubbing utility

(bzr r5335)

1 files changed, 299 insertions, 0 deletions

diff --git a/src/bind/DomStub.java b/src/bind/DomStub.java
new file mode 100644
index 000000000..df82e5012
--- /dev/null
+++ b/src/bind/DomStub.java
@@ -0,0 +1,299 @@
+
+import java.io.*;
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.util.Collections;
+
+
+/**
+ * This is not an actual java binding class.  Rather, it is
+ * a simple tool for generating C++ native method stubs from classfiles
+ */  
+public class DomStub
+{
+
+class MethodEntry
+{
+ArrayList<String> parms;
+String name;
+String type;
+
+public void addParam(String type)
+{
+    parms.add(type);
+}
+
+public MethodEntry(String methodName, String type)
+{
+    this.name = methodName;
+    this.type = type;
+    parms = new ArrayList<String>();
+}
+}
+
+
+class ClassEntry
+{
+ArrayList<MethodEntry> methods;
+String name;
+
+public void addMethod(MethodEntry method)
+{
+    methods.add(method);
+}
+
+public ClassEntry(String className)
+{
+    this.name = className;
+    methods = new ArrayList<MethodEntry>();
+}
+}
+
+
+HashMap<String, ClassEntry> classes;
+
+
+BufferedWriter out;
+
+void err(String msg)
+{
+    System.out.println("DomStub err:" + msg);
+}
+
+void trace(String msg)
+{
+    System.out.println("DomStub:" + msg);
+}
+
+void po(String msg)
+{
+    try
+	    {
+		out.write(msg);
+		}
+	catch (IOException e)
+	    {
+		}
+}
+
+
+//########################################################################
+//# G E N E R A T E
+//########################################################################
+
+void dumpClasses()
+{
+    for (ClassEntry ce : classes.values())
+        {
+        trace("########################");
+        trace("Class " + ce.name);
+        for (MethodEntry me : ce.methods)
+            {
+            trace("    " + me.type + " " + me.name);
+            for (String parm : me.parms)
+               {
+               trace("        " + parm);
+               }
+			}
+		}
+}
+
+
+void generateMethod(MethodEntry me)
+{
+    po("/**\n");
+    po(" *  Method : " + me.name + "\n");
+    po(" */\n");
+    for (String parm : me.parms)
+        {
+        po("        " + parm + "\n");
+        }
+
+}
+
+void generateClass(ClassEntry ce)
+{
+    po("//################################################################\n");
+    po("//##  " + ce.name + "\n");
+    po("//################################################################\n");
+
+    for (MethodEntry me : ce.methods)
+        generateMethod(me);
+
+}
+
+
+void generate()
+{
+    ArrayList<String> classNames = new ArrayList<String>(classes.keySet());
+    Collections.sort(classNames);
+    for (String key  : classNames)
+        {
+        ClassEntry ce = classes.get(key);
+        generateClass(ce);
+        }
+}
+
+//########################################################################
+//# P A R S E
+//########################################################################
+boolean parseEntry(String className, String methodName, String signature)
+{
+    //trace("Decl  :" + methodDecl);
+    //trace("params:" + params);
+    //#################################
+    //# Parse class and method lines
+    //#################################
+    String s = className.substring(14);
+    className = s.replace('_', '/');
+    methodName = methodName.substring(14);
+    signature = signature.substring(14);
+    //trace("className   : " + className);
+    //trace("methodName  : " + methodName);
+
+    int pos = signature.indexOf('(');
+	if (pos<0)
+	    {
+		err("no opening ( for signature");
+		return false;
+		}
+	pos++;
+    int p2 = signature.indexOf(')', pos);
+    if (p2<0)
+	    {
+		err("no closing ) for signature");
+		return false;
+		}
+	String parms = signature.substring(pos, p2);
+	String type  = signature.substring(p2+1);
+    //#################################
+    //# create method entry.  add to new or existing class
+    //#################################
+    MethodEntry method = new MethodEntry(methodName, type);
+    
+	ClassEntry clazz = classes.get(className);
+	if (clazz == null)
+	    {
+	    clazz = new ClassEntry(className);
+	    classes.put(className, clazz);
+		}
+	clazz.addMethod(method);
+
+    //#################################
+    //# Parse signature line
+    //#################################
+    
+    pos = 0;
+    int len = parms.length();
+    while (pos<len)
+        {
+        String typ = "";
+        char ch = parms.charAt(pos);
+        if (ch == '[')
+            {
+			pos++;
+            ch = parms.charAt(pos);
+            typ += ch;
+            }
+        if (ch == 'L')
+            {
+            pos++;
+            typ += ch;
+            while (pos<len)
+                {
+                ch = parms.charAt(pos);
+                if (ch == ';')
+                    break;
+                typ += ch;
+                pos++;
+				}
+			}
+		else
+		    typ += ch;
+		method.addParam(typ);
+		//trace("param:" + typ);
+    	pos++;
+		}
+    return true;
+}
+
+
+public boolean parseFile(String fname)
+{
+    boolean ret = true;
+    try
+        {
+		BufferedReader in = new BufferedReader(new FileReader(fname));
+		while (true)
+		    {
+			String s1 = in.readLine();
+			if (s1 == null)
+			    break;
+			if (!s1.startsWith(" * Class:     "))
+			    continue;
+			String s2 = in.readLine();
+			if (!s2.startsWith(" * Method:    "))
+			    continue;
+			String s3 = in.readLine();
+			if (!s3.startsWith(" * Signature: "))
+			    continue;
+			if (!parseEntry(s1, s2, s3))
+			    {
+			    ret = false;
+			    break;
+				}
+			}
+		in.close();
+		}
+	catch (IOException e)
+	    {
+	    err("processFile:" + e);
+	    ret  = false;
+		}
+    return ret;
+}
+
+
+public boolean processFile(String fname)
+{
+    try
+        {
+		out = new BufferedWriter(new FileWriter("out.txt"));
+		}
+	catch (IOException e)
+	    {
+	    err("processFile: " + e);
+	    return false;
+		}
+    if (!parseFile(fname))
+        return false;
+    //dumpClasses();
+    generate();
+    try
+        {
+		out.close();
+		}
+	catch (IOException e)
+	    {
+	    err("processFile: " + e);
+	    return false;
+		}
+    return true;
+}
+
+
+public DomStub()
+{
+    classes = new HashMap<String, ClassEntry>();
+}
+
+
+
+public static void main(String argv[])
+{
+    DomStub st = new DomStub();
+    boolean ret = st.processFile("out.h");
+}
+
+
+}
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