added hashCode

create canonifies simple ClassInterfacesTypes


git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@1140 379699f6-c40d-0410-875b-85095c16579e

jode/jode/type/ClassInterfacesType.java

@@ -78,6 +78,10 @@ public class ClassInterfacesType extends ReferenceType {
         /* Make sure that every {java.lang.Object} equals tObject */
         if (ifaces.length == 0 && clazz == null) 
             return tObject;
+	if (ifaces.length == 0)
+	    return tClass(clazz);
+	if (ifaces.length == 1 && clazz == null)
+	    return tClass(ifaces[0]);
         return new ClassInterfacesType(clazz, ifaces);
     }
 
@@ -525,6 +529,14 @@ public class ClassInterfacesType extends ReferenceType {
             return name+"_var";
     }
     
+    public int hashCode() {
+	int hash = clazz == null ? 0 : clazz.hashCode();
+	for (int i=0; i < ifaces.length; i++) {
+	    hash ^= ifaces[i].hashCode();
+	}
+	return hash;
+    }
+
     public boolean equals(Object o) {
         if (o == this) 
             return true;