initial

.classpath

+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="lib" path="/Applications/GAMS/gams24.3_osx_x64_64_sfx/apifiles/Java/api/GAMSJavaAPI.jar">
+		<attributes>
+			<attribute name="javadoc_location" value="http://www.gams.com/dd/docs/api/javadoc"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>UNPLUM</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.jdt.core.prefs

+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.7

src/ac/ed/lurg/GamsTest.java

+package ac.ed.lurg;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.gams.api.GAMSDatabase;
+import com.gams.api.GAMSJob;
+import com.gams.api.GAMSOptions;
+import com.gams.api.GAMSParameter;
+import com.gams.api.GAMSVariable;
+import com.gams.api.GAMSVariableRecord;
+import com.gams.api.GAMSWorkspace;
+import com.gams.api.GAMSWorkspaceInfo;
+
+public class GamsTest {
+	
+    public static void main(String[] args)  {
+
+        // create GAMSWorkspace "ws" with default working directory 
+        // (the directory named with current date and time under System.getProperty("java.io.tmpdir"))
+    	System.out.println(System.getProperty("user.dir"));
+        File workingDirectory = new File(System.getProperty("user.dir"), "GamsTest");
+        workingDirectory.mkdir();
+
+        // create a workspace
+        GAMSWorkspaceInfo  wsInfo  = new GAMSWorkspaceInfo();
+        wsInfo.setWorkingDirectory(workingDirectory.getAbsolutePath());
+
+        GAMSWorkspace ws = new GAMSWorkspace(wsInfo);
+        GAMSDatabase db = ws.addDatabase();
+
+        // prepare input data
+        Map<String, Double> previous_area = new HashMap<String, Double>();
+        {
+        	previous_area.put("cropland", Double.valueOf(250.0));
+        	previous_area.put("pasture", Double.valueOf(400.0));
+        }
+        
+        Map<String, Double> demand = new HashMap<String, Double>();
+        {
+        	demand.put("cereals", Double.valueOf(550.0));
+        	demand.put("fruits", Double.valueOf(60.0));
+        	demand.put("oilcrops", Double.valueOf(120.0));
+        	demand.put("starchyRoots", Double.valueOf(100.0));
+        	demand.put("treenuts", Double.valueOf(20.0));
+        	demand.put("vegetables", Double.valueOf(60.0));
+        }
+        
+        Map<String, Double> yield_ref = new HashMap<String, Double>();
+        {
+        	yield_ref.put("cereals", Double.valueOf(3));
+        	yield_ref.put("fruits", Double.valueOf(1));
+        	yield_ref.put("oilcrops", Double.valueOf(1));
+        	yield_ref.put("starchyRoots", Double.valueOf(10));
+        	yield_ref.put("treenuts", Double.valueOf(2));
+        	yield_ref.put("vegetables", Double.valueOf(7));
+        	yield_ref.put("pasture", Double.valueOf(0.7));
+        }
+
+        // add a database and add input data into the database
+
+        GAMSParameter a = db.addParameter("previous_area", 1, "previous area");
+        for(String c : previous_area.keySet())
+            a.addRecord(c).setValue(previous_area.get(c));
+
+        GAMSParameter b = db.addParameter("demand", 1, "demand for crop");
+        for(String c : demand.keySet())
+            b.addRecord(c).setValue(demand.get(c));
+
+        GAMSParameter y = db.addParameter("yield_ref", 1, "ref yield t per ha");
+        for(String c : yield_ref.keySet())
+            y.addRecord(c).setValue(yield_ref.get(c));
+
+        // create GAMSJob "t2" from the "model" string variable
+        GAMSJob t2 = ws.addJobFromFile("/Users/peteralexander/Documents/R_Workspace/landalloc/GAMS/IntExtOpt.gms");
+        GAMSOptions opt = ws.addOptions();
+
+        System.out.println(db.getName());
+        opt.defines("gdxincname", db.getName());
+        t2.run(opt, db);
+
+        GAMSVariable varAreas = t2.OutDB().getVariable("area");
+        GAMSVariable varIntensities = t2.OutDB().getVariable("intensity");
+
+        for (GAMSVariableRecord rec : varAreas) {
+           System.out.println(String.format("%s: \tarea= %.0f, \tintensity= %.3f", rec.getKeys()[0], rec.getLevel(), varIntensities.findRecord(rec.getKeys()[0]).getLevel())); 
+           // + " marginal=" + rec.getMarginal());
+       }
+
+        // cleanup GAMSWorkspace's working directory
+        cleanup(ws.workingDirectory());
+        // terminate program
+        System.exit(0);
+   }
+
+   static void cleanup(String directory)  {
+        File directoryToDelete = new File(directory);
+        String files[] = directoryToDelete.list();
+        for (String file : files) {
+           File fileToDelete = new File(directoryToDelete, file);
+           try {
+                fileToDelete.delete();
+           } catch(Exception e){
+                e.printStackTrace();
+           }
+        }
+        try {
+          directoryToDelete.delete();
+        } catch(Exception e) {
+           e.printStackTrace();
+        }
+   }
+
+}