analysisScope toJson function

core/build.gradle.kts

@@ -59,6 +59,7 @@ dependencies {
   api(projects.util) { because("public interface CallGraph extends interface NumberedGraph") }
   testFixturesImplementation(libs.ant)
   testFixturesImplementation(libs.junit.platform.launcher)
+  implementation(libs.gson)
   testImplementation(libs.assertj.core)
   testImplementation(libs.hamcrest)
   testRuntimeOnly(sourceSets["testSubjects"].output.classesDirs)

core/src/main/java/com/ibm/wala/ipa/callgraph/AnalysisScope.java

@@ -10,6 +10,7 @@
  */
 package com.ibm.wala.ipa.callgraph;
 
+import com.google.gson.Gson;
 import com.ibm.wala.classLoader.ArrayClassLoader;
 import com.ibm.wala.classLoader.BinaryDirectoryTreeModule;
 import com.ibm.wala.classLoader.ClassFileModule;
@@ -345,6 +346,42 @@ public String toString() {
     return result.toString();
   }
 
+  /**
+   * An AnalysisScope is converted to a JSON formatted variable using the loaders and exclusions
+   * hierarchy using ToJson. (Loaders) Primordial, Extension, Application, and Synthetic are the
+   * loaders keys; each one contains an arraylist of Strings. The exclusions contains an arraylist
+   * of strings.
+   *
+   * @return json variable containing contents of the AnalysisScope
+   */
+  public String toJson() {
+    LinkedHashMap<String, Object> res = new LinkedHashMap<>();
+    LinkedHashMap<String, ArrayList<String>> loaders = new LinkedHashMap<>();
+    for (ClassLoaderReference loader : loadersByName.values()) {
+      ArrayList<String> arr = new ArrayList<>();
+      for (Module m : getModules(loader)) {
+        arr.add(m.toString());
+      }
+      loaders.put(loader.getName().toString(), arr);
+    }
+    res.put("Loaders", loaders);
+    ArrayList<String> arr2 = new ArrayList<>();
+    if (getExclusions() == null) {
+      res.put("Exclusions", arr2);
+    } else {
+      String[] exclusions = getExclusions().toString().split("\\|");
+      for (int i = 0; i < exclusions.length; i++) {
+        String word = exclusions[i];
+        word = word.replace("(", "");
+        word = word.replace(")", "");
+        arr2.add(word);
+      }
+      res.put("Exclusions", arr2);
+    }
+    Gson gson = new Gson();
+    return gson.toJson(res);
+  }
+
   /**
    * @return a String that describes exclusions from the analysis scope.
    */

core/src/test/java/com/ibm/wala/core/tests/cha/AnalysisScopeTest.java

@@ -1,21 +1,37 @@
 package com.ibm.wala.core.tests.cha;
 
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.hasItem;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
 import com.ibm.wala.core.tests.util.TestConstants;
 import com.ibm.wala.core.util.config.AnalysisScopeReader;
 import com.ibm.wala.core.util.io.FileProvider;
 import com.ibm.wala.ipa.callgraph.AnalysisScope;
 import com.ibm.wala.ipa.cha.ClassHierarchy;
 import com.ibm.wala.ipa.cha.ClassHierarchyException;
 import com.ibm.wala.ipa.cha.ClassHierarchyFactory;
+import com.ibm.wala.properties.WalaProperties;
 import com.ibm.wala.types.ClassLoaderReference;
 import com.ibm.wala.types.TypeReference;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.lang.reflect.Type;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.jar.JarFile;
 import org.junit.jupiter.api.Test;
 
 public class AnalysisScopeTest {
@@ -55,4 +71,61 @@ public void testBaseScope() throws IOException, ClassHierarchyException {
                 ClassLoaderReference.Application, "Ljava/awt/AlphaComposite")),
         "found unexpected class");
   }
+
+  @Test
+  public void testToJson() throws IOException {
+    AnalysisScope scope =
+        AnalysisScopeReader.instance.readJavaScope(
+            TestConstants.WALA_TESTDATA,
+            new FileProvider().getFile("GUIExclusions.txt"),
+            AnalysisScopeTest.class.getClassLoader());
+    Gson gson = new Gson();
+    Type type = new TypeToken<LinkedHashMap<String, Object>>() {}.getType();
+    LinkedHashMap<String, Object> map = gson.fromJson(scope.toJson(), type);
+    assertEquals(
+        List.of("java\\/awt\\/.*", "javax\\/swing\\/.*", "sun\\/awt\\/.*", "sun\\/swing\\/.*"),
+        map.get("Exclusions"));
+
+    @SuppressWarnings("unchecked")
+    Map<String, List<String>> loaders = (Map<String, List<String>>) map.get("Loaders");
+    Set<String> loaderKeys =
+        new HashSet<>(List.of("Primordial", "Extension", "Application", "Synthetic"));
+    assertEquals(loaders.keySet(), loaderKeys);
+    assertEquals(2, loaders.get("Primordial").size());
+    assertThat(loaders.get("Primordial"), hasItem("Nested Jar File:primordial.jar.model"));
+    assertEquals(1, loaders.get("Application").size());
+    assertThat(
+        loaders.get("Application").get(0), containsString("com.ibm.wala.core.testdata_1.0.0.jar"));
+    assertEquals(0, loaders.get("Extension").size());
+    assertEquals(0, loaders.get("Synthetic").size());
+  }
+
+  @Test
+  public void testToJsonCustom() throws IOException {
+    AnalysisScope scope;
+    scope = AnalysisScope.createJavaAnalysisScope();
+    String[] stdlibs = WalaProperties.getJ2SEJarFiles();
+    Arrays.sort(stdlibs);
+    for (String stdlib : stdlibs) {
+      scope.addToScope(ClassLoaderReference.Primordial, new JarFile(stdlib));
+      scope.addToScope(ClassLoaderReference.Application, new JarFile(stdlib));
+    }
+    scope.setExclusions(null);
+    Gson gson = new Gson();
+    Type type = new TypeToken<LinkedHashMap<String, Object>>() {}.getType();
+    LinkedHashMap<String, Object> map = gson.fromJson(scope.toJson(), type);
+    assertEquals(List.of(), map.get("Exclusions"));
+
+    @SuppressWarnings("unchecked")
+    Map<String, List<String>> loaders = (Map<String, List<String>>) map.get("Loaders");
+    Set<String> loaderKeys =
+        new HashSet<>(List.of("Primordial", "Extension", "Application", "Synthetic"));
+    assertEquals(loaders.keySet(), loaderKeys);
+    assertEquals(stdlibs.length, loaders.get("Primordial").size());
+    assertTrue(loaders.get("Primordial").get(0).contains("/Contents/Home/jmods/java.base.jmod"));
+    assertEquals(stdlibs.length, loaders.get("Application").size());
+    assertTrue(loaders.get("Application").get(0).contains("/Contents/Home/jmods/java.base.jmod"));
+    assertEquals(0, loaders.get("Extension").size());
+    assertEquals(0, loaders.get("Synthetic").size());
+  }
 }