liquibase.serializer.AbstractLiquibaseSerializable Maven / Gradle / Ivy
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Liquibase is a tool for managing and executing database changes.
package liquibase.serializer;
import liquibase.exception.UnexpectedLiquibaseException;
import liquibase.parser.core.ParsedNode;
import liquibase.parser.core.ParsedNodeException;
import liquibase.resource.ResourceAccessor;
import liquibase.util.ISODateFormat;
import liquibase.util.ObjectUtil;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public abstract class AbstractLiquibaseSerializable implements LiquibaseSerializable {
private Set serializableFields;
@Override
public void load(ParsedNode parsedNode, ResourceAccessor resourceAccessor) throws ParsedNodeException {
for (ParsedNode childNode : parsedNode.getChildren()) {
if (!shouldAutoLoad(childNode)) {
continue;
}
try {
if (this.getSerializableFields().contains(childNode.getName())) {
Class dataTypeClass = this.getSerializableFieldDataTypeClass(childNode.getName());
if (Collection.class.isAssignableFrom(dataTypeClass)) {
Type[] dataTypeClassParameters = getSerializableFieldDataTypeClassParameters(childNode.getName());
if (dataTypeClassParameters.length == 1) {
Class collectionType = null;
if (dataTypeClassParameters[0] instanceof Class) {
collectionType = (Class) dataTypeClassParameters[0];
} else if (dataTypeClassParameters[0] instanceof ParameterizedType) {
collectionType = (Class) ((ParameterizedType) dataTypeClassParameters[0]).getRawType();
}
if ((collectionType != null) && LiquibaseSerializable.class.isAssignableFrom
(collectionType) && !collectionType.isInterface() && !Modifier.isAbstract
(collectionType.getModifiers())) {
String elementName = ((LiquibaseSerializable) collectionType.getConstructor().newInstance()).getSerializedObjectName();
List elementNodes = Collections.emptyList();
if (childNode.getName().equals(elementName)) {
elementNodes = Collections.singletonList(childNode);
} else {
elementNodes = childNode.getChildren(null, elementName);
}
if (!elementNodes.isEmpty()) {
Collection collection = ((Collection) getSerializableFieldValue(childNode.getName()));
for (ParsedNode node : elementNodes) {
LiquibaseSerializable childObject = (LiquibaseSerializable) collectionType.getConstructor().newInstance();
childObject.load(node, resourceAccessor);
collection.add(childObject);
}
}
}
}
} if (LiquibaseSerializable.class.isAssignableFrom(dataTypeClass)) {
if (!dataTypeClass.isInterface()
&& !Modifier.isAbstract(dataTypeClass.getModifiers())) {
LiquibaseSerializable childObject = (LiquibaseSerializable) dataTypeClass.getConstructor().newInstance();
childObject.load(childNode, resourceAccessor);
setSerializableFieldValue(childNode.getName(), childObject);
}
} else if (childNode.getValue() != null) {
ObjectUtil.setProperty(this, childNode.getName(), convertEscaped(childNode.getValue().toString()));
}
} else {
for (String field : this.getSerializableFields()) {
Class dataTypeClass = this.getSerializableFieldDataTypeClass(field);
if (Collection.class.isAssignableFrom(dataTypeClass)) {
Type[] dataTypeClassParameters = getSerializableFieldDataTypeClassParameters(field);
if (dataTypeClassParameters.length == 1) {
Class collectionType = null;
if (dataTypeClassParameters[0] instanceof Class) {
collectionType = (Class) dataTypeClassParameters[0];
} else if (dataTypeClassParameters[0] instanceof ParameterizedType) {
collectionType = (Class) ((ParameterizedType) dataTypeClassParameters[0]).getRawType();
}
if ((collectionType != null) && LiquibaseSerializable.class.isAssignableFrom
(collectionType) && !collectionType.isInterface() && !Modifier.isAbstract
(collectionType.getModifiers())) {
String elementName = ((LiquibaseSerializable) collectionType.getConstructor().newInstance()).getSerializedObjectName();
List elementNodes = Collections.emptyList();
if (childNode.getName().equals(elementName)) {
elementNodes = Collections.singletonList(childNode);
} else if (childNode.getName().equals(field)) {
elementNodes = childNode.getChildren(null, elementName);
}
if (!elementNodes.isEmpty()) {
Collection collection = ((Collection) getSerializableFieldValue(field));
for (ParsedNode node : elementNodes) {
LiquibaseSerializable childObject = (LiquibaseSerializable) collectionType.getConstructor().newInstance();
childObject.load(node, resourceAccessor);
collection.add(childObject);
}
}
}
}
}
}
}
} catch (Exception e) {
throw new ParsedNodeException("Error setting property", e);
}
}
if (parsedNode.getValue() != null) {
for (String field : this.getSerializableFields()) {
SerializationType type = this.getSerializableFieldType(field);
if (type == SerializationType.DIRECT_VALUE) {
Object value = parsedNode.getValue(String.class);
value = convertEscaped(value);
ObjectUtil.setProperty(this, field, value);
} else if (type == SerializationType.NAMED_FIELD) {
Object value = parsedNode.getChildValue(null, field, Object.class);
value = convertEscaped(value);
ObjectUtil.setProperty(this, field, value);
}
}
}
}
protected Object convertEscaped(Object value) {
if (value == null) {
return null;
}
Matcher matcher = Pattern.compile("(.*)!\\{(.*)\\}").matcher((String) value);
if (matcher.matches()) {
String stringValue = matcher.group(1);
try {
Class aClass = Class.forName(matcher.group(2));
if (Date.class.isAssignableFrom(aClass)) {
Date date = new ISODateFormat().parse(stringValue);
value = aClass.getConstructor(long.class).newInstance(date.getTime());
} else if (Enum.class.isAssignableFrom(aClass)) {
value = Enum.valueOf((Class)aClass, stringValue);
} else {
value = aClass.getConstructor(String.class).newInstance(stringValue);
}
} catch (Exception e) {
throw new UnexpectedLiquibaseException(e);
}
}
return value;
}
protected boolean shouldAutoLoad(ParsedNode node) {
return true;
}
@Override
public ParsedNode serialize() throws ParsedNodeException {
ParsedNode node = new ParsedNode(null, getSerializedObjectName());
for (String field : getSerializableFields()) {
Object fieldValue = getSerializableFieldValue(field);
fieldValue = serializeValue(fieldValue);
if (fieldValue == null) {
continue;
}
SerializationType type = getSerializableFieldType(field);
if (type == SerializationType.DIRECT_VALUE) {
node.setValue(fieldValue);
} else if ((type == SerializationType.NAMED_FIELD) || (type == SerializationType.NESTED_OBJECT)) {
if (fieldValue instanceof ParsedNode) {
node.addChild((ParsedNode) fieldValue);
} else {
node.addChild(new ParsedNode(null, field).setValue(fieldValue));
}
} else {
throw new UnexpectedLiquibaseException("Unknown type: "+type);
}
}
return node;
}
@Override
public Set getSerializableFields() {
return ReflectionSerializer.getInstance().getFields(this);
}
@Override
public Object getSerializableFieldValue(String field) {
return ReflectionSerializer.getInstance().getValue(this, field);
}
@Override
public SerializationType getSerializableFieldType(String field) {
return SerializationType.NAMED_FIELD;
}
protected Class getSerializableFieldDataTypeClass(String field) {
return ReflectionSerializer.getInstance().getDataTypeClass(this, field);
}
protected Type[] getSerializableFieldDataTypeClassParameters(String field) {
return ReflectionSerializer.getInstance().getDataTypeClassParameters(this, field);
}
protected void setSerializableFieldValue(String field, Object value) {
ReflectionSerializer.getInstance().setValue(this, field, value);
}
protected Object serializeValue(Object value) throws ParsedNodeException {
if (value instanceof Collection) {
List returnList = new ArrayList();
for (Object obj : (Collection) value) {
Object objValue = serializeValue(obj);
if (objValue != null) {
returnList.add(objValue);
}
}
if (((Collection) value).isEmpty()) {
return null;
} else {
return returnList;
}
} else if (value instanceof LiquibaseSerializable) {
return ((LiquibaseSerializable) value).serialize();
} else {
return value;
}
}
@Override
public String getSerializableFieldNamespace(String field) {
return getSerializedObjectNamespace();
}
}