From 75b32b502423d6f6181479ebdbf1d51b647034fa Mon Sep 17 00:00:00 2001
From: Jan Eglinger <jan.eglinger@fmi.ch>
Date: Thu, 17 Jun 2021 13:39:55 +0200
Subject: [PATCH] Add StringToResultsTableConverter

This converter allows to get a ResultsTable by its title string.

In addition, the populateInputCandidates() method allows to get a list of open results tables, e.g. to generate a choice dropdown in ObjectWidget.

Since we're using ImageJ1 classes directly, we need to add the new converter class to the exceptions in ImageJ1EncapsulationTest.
---
 .../convert/StringToResultTableConverter.java | 52 +++++++++++++++++++
 .../legacy/ImageJ1EncapsulationTest.java      |  1 +
 2 files changed, 53 insertions(+)
 create mode 100644 src/main/java/net/imagej/legacy/convert/StringToResultTableConverter.java

diff --git a/src/main/java/net/imagej/legacy/convert/StringToResultTableConverter.java b/src/main/java/net/imagej/legacy/convert/StringToResultTableConverter.java
new file mode 100644
index 000000000..f507b4d76
--- /dev/null
+++ b/src/main/java/net/imagej/legacy/convert/StringToResultTableConverter.java
@@ -0,0 +1,52 @@
+package net.imagej.legacy.convert;
+
+import java.awt.Frame;
+import java.util.Collection;
+
+import org.scijava.Priority;
+import org.scijava.convert.Converter;
+import org.scijava.plugin.Plugin;
+
+import ij.WindowManager;
+import ij.measure.ResultsTable;
+import ij.text.TextWindow;
+
+@Plugin(type = Converter.class, priority = Priority.LOW)
+public class StringToResultTableConverter extends
+AbstractLegacyConverter<String, ResultsTable> {
+
+	@Override
+	public boolean canConvert(Object src, Class<?> dest) {
+		return super.canConvert(src, dest) && convert(src, getOutputType()) != null;
+	}
+
+	@Override
+	public <T> T convert(Object src, Class<T> dest) {
+		String title = (String) src;
+		@SuppressWarnings("unchecked")
+		T rt = (T) ResultsTable.getResultsTable(title);
+		return rt;
+	}
+
+	@Override
+	public void populateInputCandidates(Collection<Object> objects) {
+		Frame[] nonImageWindows = WindowManager.getNonImageWindows();
+		for (Frame frame : nonImageWindows) {
+			if (frame instanceof TextWindow) {
+				ResultsTable rt = ((TextWindow) frame).getTextPanel().getResultsTable();
+				if (rt != null) objects.add(rt);
+			}
+		}
+	}
+
+	@Override
+	public Class<String> getInputType() {
+		return String.class;
+	}
+
+	@Override
+	public Class<ResultsTable> getOutputType() {
+		return ResultsTable.class;
+	}
+
+}
diff --git a/src/test/java/net/imagej/legacy/ImageJ1EncapsulationTest.java b/src/test/java/net/imagej/legacy/ImageJ1EncapsulationTest.java
index 5c3051250..3b88812ff 100644
--- a/src/test/java/net/imagej/legacy/ImageJ1EncapsulationTest.java
+++ b/src/test/java/net/imagej/legacy/ImageJ1EncapsulationTest.java
@@ -102,6 +102,7 @@ public void verifyEncapsulation() throws Exception {
 					className.startsWith(net.imagej.legacy.convert.ResultsTableWrapper.class.getName()) ||
 					className.startsWith(net.imagej.legacy.convert.ROITreeToOverlayConverter.class.getName()) ||
 					className.startsWith(net.imagej.legacy.convert.StringToImagePlusConverter.class.getName()) ||
+					className.startsWith(net.imagej.legacy.convert.StringToResultTableConverter.class.getName()) ||
 					className.startsWith(net.imagej.legacy.convert.TableListWrapper.class.getName()) ||
 					className.startsWith(net.imagej.legacy.convert.TableToResultsTableConverters.class.getName()) ||
 					className.startsWith(net.imagej.legacy.convert.TableUnwrapper.class.getName()) ||