Revision: 16864
http://sourceforge.net/p/gate/code/16864
Author: markagreenwood
Date: 2013-09-09 12:50:13 +0000 (Mon, 09 Sep 2013)
Log Message:
-----------
added a new method to the ResourceHelper to make it easy to call methods
defined by helpers from embedded code as well as having easy access through the
GUI
Modified Paths:
--------------
gate/trunk/src/gate/gui/ResourceHelper.java
Modified: gate/trunk/src/gate/gui/ResourceHelper.java
===================================================================
--- gate/trunk/src/gate/gui/ResourceHelper.java 2013-09-09 12:07:52 UTC (rev
16863)
+++ gate/trunk/src/gate/gui/ResourceHelper.java 2013-09-09 12:50:13 UTC (rev
16864)
@@ -20,6 +20,8 @@
import gate.event.CreoleEvent;
import gate.event.CreoleListener;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@@ -27,7 +29,7 @@
import javax.swing.Action;
public abstract class ResourceHelper extends AbstractResource implements
- CreoleListener {
+ CreoleListener {
private static final long serialVersionUID = 1657147709821774423L;
@@ -54,8 +56,8 @@
* {@link #buildActions(NameBearerHandle)}.
*
* @param handle
- * the {@link gate.gui.NameBearerHandle} instance we are wanting to
add new menu
- * items to
+ * the {@link gate.gui.NameBearerHandle} instance we are wanting to
+ * add new menu items to
* @return a list of {@link javax.swing.Action} instances which will be added
* to the right click menu of the specified handle
*/
@@ -72,7 +74,8 @@
/**
* Build the {@link javax.swing.Action} instances that should be used to
- * enhance the right-click menu of the specified {@link
gate.gui.NameBearerHandle}.
+ * enhance the right-click menu of the specified
+ * {@link gate.gui.NameBearerHandle}.
*
* @param handle
* the {@link gate.gui.NameBearerHandle} instance we are adding to
@@ -81,6 +84,62 @@
*/
protected abstract List<Action> buildActions(NameBearerHandle handle);
+ /**
+ * Allows for the calling of methods defined within ResourceHelper instances
+ * which aren't part of the core API and so which can only be called via
+ * reflection.
+ *
+ * @param action
+ * the name of the method to call (method must take a Resource
+ * instance as it's first parameter)
+ * @param resource
+ * the Resource instance that you want to help
+ * @param params
+ * parameters to the method you are trying to call
+ * @return the return value from the method you are calling, or null if the
+ * method has a void return type
+ */
+ public Object call(String action, Resource resource, Object... params)
+ throws NoSuchMethodException, IllegalArgumentException,
+ IllegalAccessException, InvocationTargetException {
+
+ // get all the methods defined for this instance of the helper
+ Method[] methods = this.getClass().getMethods();
+
+ for(Method method : methods) {
+ // for each method....
+
+ // if the method name doesn't match then skip onto the next method
+ if(!method.getName().equals(action)) continue;
+
+ // get the types of the methods params
+ Class<?>[] paramTypes = method.getParameterTypes();
+
+ // if the method doesn't have the right number of params then skip to the
+ // next method
+ if(paramTypes.length != params.length + 1) continue;
+
+ //check the param types and skip to the next method if they aren't
compatible
+ if(!paramTypes[0].isAssignableFrom((resource.getClass()))) continue;
+ for(int i = 0; i < params.length; ++i) {
+ if(!paramTypes[i + 1].isAssignableFrom(params[i].getClass())) continue;
+ }
+
+ //if we got to here then we have found a method we can call so....
+
+ //copy the params into a single array
+ Object[] parameters = new Object[params.length + 1];
+ parameters[0] = resource;
+ System.arraycopy(params, 0, parameters, 1, params.length);
+
+ //and finally call the method
+ return method.invoke(this, parameters);
+
+ }
+
+ throw new NoSuchMethodException("we can't find what you are looking for");
+ }
+
@Override
public void cleanup() {
// do the normal cleanup
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