< prev index next >
src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/linker/NashornCallSiteDescriptor.java
Print this page
*** 32,41 ****
--- 32,42 ----
import java.util.concurrent.ConcurrentMap;
import jdk.internal.dynalink.CallSiteDescriptor;
import jdk.internal.dynalink.support.AbstractCallSiteDescriptor;
import jdk.internal.dynalink.support.CallSiteDescriptorFactory;
import jdk.nashorn.internal.ir.debug.NashornTextifier;
+ import jdk.nashorn.internal.runtime.ScriptRuntime;
/**
* Nashorn-specific implementation of Dynalink's {@link CallSiteDescriptor}. The reason we have our own subclass is that
* we can have a more compact representation, as we know that we're always only using {@code "dyn:*"} operations; also
* we're storing flags in an additional primitive field.
*** 246,255 ****
--- 247,304 ----
public String getOperand() {
return operand;
}
/**
+ * If this is a dyn:call or dyn:new, this returns function description from callsite.
+ * Caller has to make sure this is a dyn:call or dyn:new call site.
+ *
+ * @return function description if available (or null)
+ */
+ public String getFunctionDescription() {
+ assert getFirstOperator().equals("call") || getFirstOperator().equals("new");
+ return getNameTokenCount() > 2? getNameToken(2) : null;
+ }
+
+ /**
+ * If this is a dyn:call or dyn:new, this returns function description from callsite.
+ * Caller has to make sure this is a dyn:call or dyn:new call site.
+ *
+ * @param desc call site descriptor
+ * @return function description if available (or null)
+ */
+ public static String getFunctionDescription(final CallSiteDescriptor desc) {
+ return desc instanceof NashornCallSiteDescriptor ?
+ ((NashornCallSiteDescriptor)desc).getFunctionDescription() : null;
+ }
+
+
+ /**
+ * Returns the error message to be used when dyn:call or dyn:new is used on a non-function.
+ *
+ * @param obj object on which dyn:call or dyn:new is used
+ * @return error message
+ */
+ public String getFunctionErrorMessage(final Object obj) {
+ final String funcDesc = getFunctionDescription();
+ return funcDesc != null? funcDesc : ScriptRuntime.safeToString(obj);
+ }
+
+ /**
+ * Returns the error message to be used when dyn:call or dyn:new is used on a non-function.
+ *
+ * @param desc call site descriptor
+ * @param obj object on which dyn:call or dyn:new is used
+ * @return error message
+ */
+ public static String getFunctionErrorMessage(final CallSiteDescriptor desc, final Object obj) {
+ return desc instanceof NashornCallSiteDescriptor ?
+ ((NashornCallSiteDescriptor)desc).getFunctionErrorMessage(obj) :
+ ScriptRuntime.safeToString(obj);
+ }
+
+ /**
* Returns the Nashorn-specific flags for this call site descriptor.
* @param desc the descriptor. It can be any kind of a call site descriptor, not necessarily a
* {@code NashornCallSiteDescriptor}. This allows for graceful interoperability when linking Nashorn with code
* generated outside of Nashorn.
* @return the Nashorn-specific flags for the call site, or 0 if the passed descriptor is not a Nashorn call site
< prev index next >