SpecialValues.java
1package com.gams.examples.specialvalues;
2 
3 import java.io.File;
4 
5 import com.gams.api.GAMSDatabase;
6 import com.gams.api.GAMSJob;
7 import com.gams.api.GAMSOptions;
8 import com.gams.api.GAMSWorkspace;
9 import com.gams.api.GAMSWorkspaceInfo;
10 
16 public class SpecialValues {
17 
18  public static void main(String[] args) throws Exception {
19  GAMSWorkspaceInfo wsInfo = new GAMSWorkspaceInfo();
20  if (args.length > 0)
21  wsInfo.setSystemDirectory( args[0] );
22  File workingDirectory = new File(System.getProperty("user.dir"), "sp");
23  workingDirectory.mkdir();
24  wsInfo.setWorkingDirectory(workingDirectory.getAbsolutePath());
25  GAMSWorkspace ws = new GAMSWorkspace( wsInfo );
26 
27  GAMSDatabase dbIn = ws.addDatabase("myDB");
28  dbIn.addParameter("javaUndef", 0).addRecord().setValue( 1.0E300 );
29  dbIn.addParameter("javaNA", 0).addRecord().setValue( Double.NaN );
30  dbIn.addParameter("javaPInf", 0).addRecord().setValue( Double.POSITIVE_INFINITY );
31  dbIn.addParameter("javaMInf", 0).addRecord().setValue( Double.NEGATIVE_INFINITY );
32  dbIn.addParameter("javaEps", 0).addRecord().setValue( 4.94066E-324 );
33 
34  GAMSJob gj = ws.addJobFromString( model );
35 
36  GAMSOptions opt = ws.addOptions();
37  opt.defines("gdxincname", dbIn.getName());
38 
39  gj.run(opt, dbIn);
40 
41  GAMSDatabase dbOut = gj.OutDB();
42  double GUndef = dbOut.getParameter("GUndef").getFirstRecord().getValue();
43  if (GUndef != 1.0E300 )
44  throw new Exception("GUndef not as expected: " + GUndef);
45  double GNA = dbOut.getParameter("GNA").getFirstRecord().getValue();
46  if (!Double.isNaN(GNA))
47  throw new Exception("GNA not as expected: " + GNA);
48  double GPInf = dbOut.getParameter("GPInf").getFirstRecord().getValue();
49  if (GPInf != Double.POSITIVE_INFINITY)
50  throw new Exception("GPInf not as expected: " + GPInf);
51  double GMInf = dbOut.getParameter("GMInf").getFirstRecord().getValue();
52  if (GMInf != Double.NEGATIVE_INFINITY)
53  throw new Exception("GMInf not as expected: " + GMInf);
54  double GEps = dbOut.getParameter("GEps").getFirstRecord().getValue();
55  if (GEps != 4.94066E-324)
56  throw new Exception("GEps not as expected: " + GEps);
57 
58  System.exit(0);
59  }
60 
61  static String model =
62  "Scalar GUndef \n" +
63  " GNA / NA / \n" +
64  " GPInf / +Inf / \n" +
65  " GMInf / -Inf / \n" +
66  " GEps / eps / \n" +
67  " javaUndef \n" +
68  " javaNA \n" +
69  " javaPInf \n" +
70  " javaMInf \n" +
71  " javaEps ; \n" +
72  " \n" +
73  "$onUndf \n" +
74  "$gdxIn %gdxincname% \n" +
75  "$load javaUndef javaNA javaPInf javaMInf javaEps \n" +
76  "$gdxIn \n" +
77  " \n" +
78  "GUndef = 1/0; \n" +
79  "ExecError = 0; \n" +
80  " \n" +
81  "abort$(GUndef <> javaUndef) 'javaUndef not as expected', GUndef, javaUndef;\n" +
82  "abort$(GNA <> javaNA ) 'javaNA not as expected', GNA, javaNA; \n" +
83  "abort$(GPInf <> javaPInf ) 'javaPInf not as expected', GPInf, javaPInf; \n" +
84  "abort$(GMInf <> javaMInf ) 'javaMInf not as expected', GMInf, javaMInf; \n" +
85  "abort$(GEps <> javaEps ) 'javaEps not as expected', GEps, javaEps \n";
86 }
87 
com::gams::api::GAMSDatabase::getParameter
GAMSParameter getParameter(String identifier)
com::gams::api::GAMSOptions::defines
void defines(String defStr, String asStr)
com::gams::api::GAMSWorkspaceInfo::setSystemDirectory
void setSystemDirectory(String directory)
com::gams.examples.specialvalues.SpecialValues
This example shows how special values of the programming language (e.g.
Definition: SpecialValues.java:16
com::gams::api::GAMSDatabase::addParameter
GAMSParameter addParameter(String identifier, int dimension)
com::gams::api::GAMSWorkspace::addJobFromString
GAMSJob addJobFromString(String source)
com::gams::api::GAMSWorkspaceInfo::setWorkingDirectory
void setWorkingDirectory(String directory)
com::gams::api::GAMSJob::OutDB
GAMSDatabase OutDB()
GAMSSymbol< GAMSParameterRecord >::addRecord
T addRecord(Vector< String > keys)