Index: api/src/org/netbeans/api/debugger/jpda/JPDADebugger.java
===================================================================
RCS file: /cvs/debuggerjpda/api/src/org/netbeans/api/debugger/jpda/JPDADebugger.java,v
retrieving revision 1.18
diff -u -r1.18 JPDADebugger.java
--- api/src/org/netbeans/api/debugger/jpda/JPDADebugger.java	12 Aug 2005 12:45:10 -0000	1.18
+++ api/src/org/netbeans/api/debugger/jpda/JPDADebugger.java	21 Oct 2005 12:46:30 -0000
@@ -322,6 +322,17 @@
      * @return <code>true</code> if this debugger supports Pop action
      */
     public abstract boolean canPopFrames ();
+    
+    /**
+     * Determines if the target debuggee can be modified.
+     *
+     * @return <code>true</code> if the target debuggee can be modified or when
+     *         this information is not available (on JDK 1.4).
+     * @since 2.3
+     */
+    public boolean canBeModified() {
+        return true;
+    }
 
     /**
      * Implements fix & continue (HotSwap). Map should contain class names
Index: api/manifest.mf
===================================================================
RCS file: /cvs/debuggerjpda/api/manifest.mf,v
retrieving revision 1.13
diff -u -r1.13 manifest.mf
--- api/manifest.mf	24 Sep 2005 00:37:04 -0000	1.13
+++ api/manifest.mf	21 Oct 2005 12:46:30 -0000
@@ -1,6 +1,6 @@
 Manifest-Version: 1.0
 OpenIDE-Module: org.netbeans.api.debugger.jpda/2
 OpenIDE-Module-Localizing-Bundle: org/netbeans/api/debugger/jpda/Bundle.properties
-OpenIDE-Module-Specification-Version: 2.2
+OpenIDE-Module-Specification-Version: 2.3
 OpenIDE-Module-Package-Dependencies: com.sun.jdi[VirtualMachineManager]
 
Index: api/apichanges.xml
===================================================================
RCS file: /cvs/debuggerjpda/api/apichanges.xml,v
retrieving revision 1.11
diff -u -r1.11 apichanges.xml
--- api/apichanges.xml	18 Aug 2005 14:46:09 -0000	1.11
+++ api/apichanges.xml	21 Oct 2005 12:46:31 -0000
@@ -348,6 +348,23 @@
         <class package="org.netbeans.api.debugger.jpda" name="JPDAThread" />
         <issue number="59072"/>
     </change>
+    <change>
+        <api name="JPDADebuggerAPI"/>
+        <summary>Added canBeModified() method to JPDADebugger class</summary>
+        <version major="2" minor="3"/>
+        <date day="21" month="10" year="2005"/>
+        <author login="mentlicher"/>
+        <compatibility addition="yes" source="compatible" binary="compatible"/>
+        <description>
+            <p>
+                A possibility to detect whether the debuggee is read-only is added.
+                This check works fine on JDK 1.5 and higher, on JDK 1.4 it returns
+                <code>true</code> by default.
+            </p>
+        </description>
+        <class package="org.netbeans.api.debugger.jpda" name="JPDADebugger" />
+        <issue number="67046"/>
+    </change>
 
 </changes>
 
Index: arch.xml
===================================================================
RCS file: /cvs/debuggerjpda/arch.xml,v
retrieving revision 1.1
diff -u -r1.1 arch.xml
--- arch.xml	17 May 2004 11:42:15 -0000	1.1
+++ arch.xml	21 Oct 2005 12:46:32 -0000
@@ -126,7 +126,7 @@
         </question>
 -->
 <answer id="dep-jre">
-    Needs at least JRE 1.3.
+    Needs at least JRE 1.4.
 </answer>
 
 
@@ -138,7 +138,7 @@
         </question>
 -->
 <answer id="dep-jrejdk">
-    Need JDK (dt.jar).
+    Need JDK (dt.jar, tools.jar).
 </answer>
 
 
@@ -578,7 +578,9 @@
         </question>
 -->
 <answer id="exec-reflection">
-    No.
+    VirtualMachine.canBeModified(), TypeComponent.genericSignature() and
+    LocalVariable.genericSignature() are called by reflection, because it's
+    available on JDK 1.5 and higher only.
 </answer>
 
 
Index: src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java
===================================================================
RCS file: /cvs/debuggerjpda/src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java,v
retrieving revision 1.86
diff -u -r1.86 JPDADebuggerImpl.java
--- src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java	17 Oct 2005 09:28:13 -0000	1.86
+++ src/org/netbeans/modules/debugger/jpda/JPDADebuggerImpl.java	18 Oct 2005 13:07:46 -0000
@@ -313,6 +313,33 @@
             
         }
     }
+    
+    private Boolean canBeModified;
+    private Object canBeModifiedLock = new Object();
+    
+    public boolean canBeModified() {
+        VirtualMachine vm = getVirtualMachine ();
+        if (vm == null) return false;
+        synchronized (canBeModifiedLock) {
+            if (canBeModified == null) {
+                try {
+                    java.lang.reflect.Method canBeModifiedMethod =
+                            com.sun.jdi.VirtualMachine.class.getMethod("canBeModified", new Class[] {});
+                    Object modifiable = canBeModifiedMethod.invoke(vm, new Object[] {});
+                    canBeModified = (Boolean) modifiable;
+                } catch (NoSuchMethodException nsmex) {
+                    // On JDK 1.4 we do not know... we suppose that can
+                    canBeModified = Boolean.TRUE;
+                } catch (IllegalAccessException iaex) {
+                    canBeModified = Boolean.TRUE;
+                } catch (InvocationTargetException itex) {
+                    canBeModified = Boolean.TRUE;
+                }
+            }
+            return canBeModified.booleanValue();
+        }
+        // return vm.canBeModified(); -- After we'll build on JDK 1.5
+    }
 
     private SmartSteppingFilter smartSteppingFilter;
 
@@ -640,6 +667,9 @@
             JPDAUtils.printFeatures (vm);
         }
         virtualMachine = vm;
+        synchronized (canBeModifiedLock) {
+            canBeModified = null; // Reset the can be modified flag
+        }
         
         initGenericsSupport ();