svn commit: r526890 - in /incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler: AssignGenerator.java bom/ToFrom.java

[ms...@apache.org]

Author: mszefler
Date: Mon Apr  9 12:46:39 2007
New Revision: 526890

URL: http://svn.apache.org/viewvc?view=rev&rev=526890
Log:
Compiler support for DirectRef assignment.

Modified:
    incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/AssignGenerator.java
    incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/bom/ToFrom.java

Modified: incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/AssignGenerator.java
URL: http://svn.apache.org/viewvc/incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/AssignGenerator.java?view=diff&rev=526890&r1=526889&r2=526890
==============================================================================
--- incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/AssignGenerator.java (original)
+++ incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/AssignGenerator.java Mon Apr  9 12:46:39 2007
@@ -24,6 +24,7 @@
 import org.apache.ode.bpel.compiler.bom.Activity;
 import org.apache.ode.bpel.compiler.bom.AssignActivity;
 import org.apache.ode.bpel.compiler.bom.Copy;
+import org.apache.ode.bpel.compiler.bom.ExtensionVal;
 import org.apache.ode.bpel.compiler.bom.From;
 import org.apache.ode.bpel.compiler.bom.LiteralVal;
 import org.apache.ode.bpel.compiler.bom.PartnerLinkVal;
@@ -35,6 +36,7 @@
 import org.apache.ode.bpel.o.OActivity;
 import org.apache.ode.bpel.o.OAssign;
 import org.apache.ode.bpel.o.OMessageVarType;
+import org.apache.ode.bpel.o.OAssign.RValue;
 import org.apache.ode.utils.DOMUtils;
 import org.apache.ode.utils.msg.MessageBundle;
 import org.w3c.dom.Document;
@@ -43,9 +45,9 @@
 import javax.xml.namespace.QName;
 
 /**
- * Generates code for <code>&lt;assign&gt;</code> activities. This class
- * simply extends {@link DefaultActivityGenerator} as the default implentation
- * suffices.
+ * Generates code for <code>&lt;assign&gt;</code> activities. 
+ * 
+ * @author Maciej Szefler ( m s z e f l e r @ g m a i l . c o m )
  */
 class AssignGenerator extends DefaultActivityGenerator {
     private static final Log __log = LogFactory.getLog(AssignGenerator.class);
@@ -149,7 +151,9 @@
     private OAssign.RValue compileFrom(From from) {
         assert from != null;
         try {
-            if (from.isLiteralVal()) {
+            if (from.isExtensionVal()) {
+                return compileExtensionVal(from.getAsExtensionVal());
+            } else if (from.isLiteralVal()) {
                 return compileLiteral(from.getAsLiteralVal());
             } else if (from.isPropertyVal()) {
                 OAssign.PropertyRef pref = new OAssign.PropertyRef(_context.getOProcess());
@@ -187,6 +191,20 @@
                 ce.getCompilationMessage().source = from;
             throw ce;
         }
+    }
+
+    /**
+     * Compile an extension to/from-spec. Extension to/from-specs are compiled into 
+     * "DirectRef"s. 
+     * 
+     * @param extVal source representation
+     * @return compiled representation
+     */
+    private RValue compileExtensionVal(ExtensionVal extVal) {
+        OAssign.DirectRef dref = new OAssign.DirectRef(_context.getOProcess());
+        dref.variable = _context.resolveVariable(extVal.getVariable());
+        dref.elName =  extVal.getExtension();
+        return dref;
     }
 
     private OAssign.RValue compileLiteral(LiteralVal from) {

Modified: incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/bom/ToFrom.java
URL: http://svn.apache.org/viewvc/incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/bom/ToFrom.java?view=diff&rev=526890&r1=526889&r2=526890
==============================================================================
--- incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/bom/ToFrom.java (original)
+++ incubator/ode/trunk/bpel-compiler/src/main/java/org/apache/ode/bpel/compiler/bom/ToFrom.java Mon Apr  9 12:46:39 2007
@@ -33,6 +33,29 @@
         return null;
     }
     
+    /**
+     * Cast this tofrom to an "extension" to/from. This is NOT part of the BPEL spec, and 
+     * is used to provide access to custom extensions (for example reading/writing SOAP
+     * message headers)... Yes. it's evil. 
+     * 
+     * @author mszefler
+     * @return the object cast to {@link ExtensionVal} if appropriate, null otherwise.
+     */
+    public ExtensionVal getAsExtensionVal() {
+        if (getAttribute("extension",null) != null)
+            return new ExtensionVal(getElement());
+        return null;
+    }
+    
+    /**
+     * Test whether this to/from is an "extension" to-from (i.e. does it have the "extension" 
+     * attribute). 
+     * @return
+     */
+    public boolean isExtensionVal() {
+        return getAsExtensionVal() != null;
+    }
+
     public boolean isVariableVal() {
         return getAsVariableVal() != null;
     }