/**
* Generate the ChangeMetaData for this class. Default implementation reads from the @{@link
* DatabaseChange } annotation and calls out to {@link #createChangeParameterMetadata(String)} for
* each property.
*
* @throws UnexpectedLiquibaseException if no @DatabaseChange annotation on this Change class
*/
@Override
public ChangeMetaData createChangeMetaData() {
try {
DatabaseChange databaseChange = this.getClass().getAnnotation(DatabaseChange.class);
if (databaseChange == null) {
throw new UnexpectedLiquibaseException(
"No @DatabaseChange annotation for " + getClass().getName());
}
Set<ChangeParameterMetaData> params = new HashSet<ChangeParameterMetaData>();
for (PropertyDescriptor property :
Introspector.getBeanInfo(this.getClass()).getPropertyDescriptors()) {
if (isInvalidProperty(property)) {
continue;
}
Method readMethod = property.getReadMethod();
Method writeMethod = property.getWriteMethod();
if (readMethod == null) {
try {
readMethod =
this.getClass().getMethod("is" + StringUtils.upperCaseFirst(property.getName()));
} catch (Exception ignore) {
// it was worth a try
}
}
if (readMethod != null && writeMethod != null) {
DatabaseChangeProperty annotation =
readMethod.getAnnotation(DatabaseChangeProperty.class);
if (annotation == null || annotation.isChangeProperty()) {
params.add(createChangeParameterMetadata(property.getDisplayName()));
}
}
}
Map<String, String> notes = new HashMap<String, String>();
for (DatabaseChangeNote note : databaseChange.databaseNotes()) {
notes.put(note.database(), note.notes());
}
return new ChangeMetaData(
databaseChange.name(),
databaseChange.description(),
databaseChange.priority(),
databaseChange.appliesTo(),
notes,
params);
} catch (Throwable e) {
throw new UnexpectedLiquibaseException(e);
}
}
/**
* Create the {@link ChangeParameterMetaData} "serializationType" value. Uses the value on the
* DatabaseChangeProperty annotation or returns {@link SerializationType}.NAMED_FIELD as a
* default.
*/
@SuppressWarnings("UnusedParameters")
protected SerializationType createSerializationTypeMetaData(
String parameterName, DatabaseChangeProperty changePropertyAnnotation) {
if (changePropertyAnnotation == null) {
return SerializationType.NAMED_FIELD;
}
return changePropertyAnnotation.serializationType();
}
/**
* Create the {@link ChangeParameterMetaData} "description" value. Uses the value on the
* DatabaseChangeProperty annotation or returns null as a default.
*/
@SuppressWarnings("UnusedParameters")
protected String createDescriptionMetaData(
String parameterName, DatabaseChangeProperty changePropertyAnnotation) {
if (changePropertyAnnotation == null) {
return null;
}
return StringUtils.trimToNull(changePropertyAnnotation.description());
}
/**
* Create the {@link ChangeParameterMetaData} "supportedDatabase" value. Uses the value on the
* DatabaseChangeProperty annotation or returns an array containing the string "COMPUTE" as a
* default. "COMPUTE" will cause ChangeParameterMetaData to attempt to determine the required
* databases based on the generated Statements
*/
@SuppressWarnings("UnusedParameters")
protected String[] createSupportedDatabasesMetaData(
String parameterName, DatabaseChangeProperty changePropertyAnnotation) {
if (changePropertyAnnotation == null) {
return new String[] {ChangeParameterMetaData.COMPUTE};
} else {
return changePropertyAnnotation.supportsDatabase();
}
}
/**
* Create the {@link ChangeParameterMetaData} "mustEqual" value. Uses the value on the
* DatabaseChangeProperty annotation or returns null as a default.
*/
@SuppressWarnings("UnusedParameters")
protected String createMustEqualExistingMetaData(
String parameterName, DatabaseChangeProperty changePropertyAnnotation) {
if (changePropertyAnnotation == null) {
return null;
}
return changePropertyAnnotation.mustEqualExisting();
}
/**
* Create the {@link ChangeParameterMetaData} "example" value. Uses the value on the
* DatabaseChangeProperty annotation or returns null as a default. Returns map with key=database
* short name, value=example. Use short-name "all" as the fallback.
*/
@SuppressWarnings("UnusedParameters")
protected Map<String, Object> createExampleValueMetaData(
String parameterName, DatabaseChangeProperty changePropertyAnnotation) {
if (changePropertyAnnotation == null) {
return null;
}
Map<String, Object> examples = new HashMap<String, Object>();
examples.put("all", StringUtils.trimToNull(changePropertyAnnotation.exampleValue()));
return examples;
}