Examples of org.springsource.loaded.TypeDelta

org.springsource.loaded.TypeDelta
Encapsulates what has changed between two versions of a type - it is used to determine if a reload is possible and also passed on events related to reloading so that the plugins can tailor their actions based on what prevented reloading. The various hasXXX and getXXX methods should be used to query it. @author Andy Clement @since 0.5.0

    type.loadNewVersion("2", retrieveRename(t, t + "2"));
    result = runConstructor(type.getClazz(), "");
    assertEquals("Hello", result.stdout);


    // should be no changes
    TypeDelta td = type.getLiveVersion().getTypeDelta();
    assertNotNull(td);
    assertFalse(td.hasAnythingChanged());
    assertNull(td.getChangedMethods());


    // this version changes the constructor
    type.loadNewVersion("3", retrieveRename(t, t + "3"));
    result = runConstructor(type.getClazz(), "");
    assertEquals("Goodbye", result.stdout);
    td = type.getLiveVersion().getTypeDelta();
    assertNotNull(td);
    assertTrue(td.hasAnythingChanged());
    Map<String, MethodDelta> changedMethods = td.getChangedMethods();
    assertNotNull(changedMethods);
    assertEquals(1, changedMethods.size());
    assertEquals("MethodDelta[method:<init>()V]", changedMethods.get("<init>()V").toString());
    MethodDelta md = changedMethods.get("<init>()V");
    assertTrue(md.hasAnyChanges());

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public class TypeDeltaTests extends SpringLoadedTests {


  @Test
  public void typesAreTheSame() {
    byte[] bytes = loadBytesForClass("differs.DiffOne");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes);
    assertFalse(td.hasAnythingChanged());
  }

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  @Test
  public void basicTypeLevelChanges() {
    byte[] bytes = loadBytesForClass("differs.DiffOne");
    byte[] bytes2 = retrieveRename("differs.DiffOne", "differs.DiffOneX");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertTrue(td.hasTypeDeclarationChanged());
    assertTrue(td.hasTypeAccessChanged());
    assertTrue(Modifier.isPublic(td.oAccess));
    assertTrue(!Modifier.isPublic(td.nAccess));
  }

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  @Test
  public void basicTypeLevelChanges2() {
    byte[] bytes = loadBytesForClass("differs.DiffOne");
    byte[] bytes2 = retrieveRename("differs.DiffOne", "differs.DiffOneY");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertTrue(td.hasTypeDeclarationChanged());
    assertTrue(td.hasTypeInterfacesChanged());
    assertEquals(0, td.oInterfaces.size());
    assertEquals("java/io/Serializable", td.nInterfaces.get(0));
  }

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  @Test
  public void basicTypeLevelChanges3() {
    byte[] bytes = loadBytesForClass("differs.DiffThree");
    byte[] bytes2 = retrieveRename("differs.DiffThreeZ", "differs.DiffThreeX");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertTrue(td.hasTypeNameChanged());
    assertTrue(td.hasTypeSupertypeChanged());
    assertTrue(td.hasTypeInterfacesChanged());
    assertEquals(1, td.nInterfaces.size());
    assertFalse(td.hasTypeAccessChanged());
    assertFalse(td.haveFieldsChanged());
    assertFalse(td.haveFieldsChangedOrBeenAddedOrRemoved());
    assertFalse(td.hasTypeSignatureChanged());
    // As of May-2011 generic signature change is not a change
    //    byte[] bytes3 = retrieveRename("differs.DiffThreeYY", "differs.DiffThreeY");
    //    td = TypeDiffComputer.computeDifferences(bytes, bytes3);
    //    assertTrue(td.hasTypeSignatureChanged());
  }

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  @Test
  public void addedAField() {
    byte[] bytes = loadBytesForClass("differs.DiffOne");
    byte[] bytes2 = retrieveRename("differs.DiffOne", "differs.DiffOneZ");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertFalse(td.hasTypeNameChanged());
    assertFalse(td.hasTypeSupertypeChanged());
    assertFalse(td.hasTypeInterfacesChanged());
    assertFalse(td.hasTypeDeclarationChanged());
    assertTrue(td.haveFieldsChangedOrBeenAddedOrRemoved());
    assertTrue(td.hasNewFields());
    assertEquals(1, td.getNewFields().size());
    assertEquals("public I newIntField", Utils.fieldNodeFormat(td.getNewFields().get("newIntField")));
  }

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  @Test
  public void removedAField() {
    byte[] bytes = loadBytesForClass("differs.DiffTwo");
    byte[] bytes2 = retrieveRename("differs.DiffTwo", "differs.DiffTwoX");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertFalse(td.hasTypeDeclarationChanged());
    assertTrue(td.haveFieldsChangedOrBeenAddedOrRemoved());
    assertTrue(td.hasLostFields());
    assertEquals(1, td.getLostFields().size());
    assertEquals("public I anIntField", Utils.fieldNodeFormat(td.getLostFields().get("anIntField")));
  }

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  @Test
  public void changedAFieldType() {
    byte[] bytes = loadBytesForClass("differs.DiffTwo");
    byte[] bytes2 = retrieveRename("differs.DiffTwo", "differs.DiffTwoY");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertFalse(td.hasTypeDeclarationChanged());
    assertTrue(td.haveFieldsChangedOrBeenAddedOrRemoved());
    assertFalse(td.hasLostFields());
    assertFalse(td.hasNewFields());
    assertTrue(td.haveFieldsChanged());
    assertEquals(1, td.getChangedFields().size());
    assertEquals("FieldDelta[field:anIntField type:I>Ljava/lang/String;]", td.getChangedFields().get("anIntField").toString());
  }

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  @Test
  public void changedAFieldAccess() {
    byte[] bytes = loadBytesForClass("differs.DiffTwo");
    byte[] bytes2 = retrieveRename("differs.DiffTwo", "differs.DiffTwoZ");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertFalse(td.hasTypeDeclarationChanged());
    assertTrue(td.haveFieldsChangedOrBeenAddedOrRemoved());
    assertFalse(td.hasLostFields());
    assertFalse(td.hasNewFields());
    assertTrue(td.haveFieldsChanged());
    assertEquals(1, td.getChangedFields().size());
    assertEquals("FieldDelta[field:anIntField access:1>2]", td.getChangedFields().get("anIntField").toString());
  }

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  @Test
  public void changedFieldAnnotations() {
    byte[] bytes = loadBytesForClass("differs.AnnotFields");
    byte[] bytes2 = retrieveRename("differs.AnnotFields", "differs.AnnotFields2");
    TypeDelta td = TypeDiffComputer.computeDifferences(bytes, bytes2);
    assertTrue(td.hasAnythingChanged());
    assertFalse(td.hasTypeDeclarationChanged());
    assertTrue(td.haveFieldsChangedOrBeenAddedOrRemoved());
    assertFalse(td.hasLostFields());
    assertFalse(td.hasNewFields());
    assertTrue(td.haveFieldsChanged());
    assertEquals(1, td.getChangedFields().size());
    assertEquals("FieldDelta[field:i annotations:-differs/Annot]", td.getChangedFields().get("i").toString());
  }

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