package io.ebeaninternal.server.type;
import io.ebean.config.dbplatform.DbPlatformType;
import io.ebeanservice.docstore.api.mapping.DocPropertyType;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.persistence.PersistenceException;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.lang.reflect.Type;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Supports @DbJson properties using Jackson ObjectMapper.
*/
public class ScalarTypeJsonObjectMapper {
/**
* Create and return the appropriate ScalarType.
*/
public static ScalarType<?> createTypeFor(boolean postgres, Class<?> type, ObjectMapper objectMapper,
Type genericType, int dbType, DocPropertyType docType) {
String pgType = getPostgresType(postgres, dbType);
if (Set.class.equals(type)) {
return new OmSet(objectMapper, genericType, dbType, pgType, docType);
}
if (List.class.equals(type)) {
return new OmList(objectMapper, genericType, dbType, pgType, docType);
}
if (Map.class.equals(type)) {
return new OmMap(objectMapper, genericType, dbType, pgType);
}
return new GenericObject(objectMapper, genericType, dbType, pgType);
}
private static String getPostgresType(boolean postgres, int dbType) {
if (postgres) {
switch (dbType) {
case DbPlatformType.JSON:
return PostgresHelper.JSON_TYPE;
case DbPlatformType.JSONB:
return PostgresHelper.JSONB_TYPE;
}
}
return null;
}
/**
* Maps any type (Object) using Jackson ObjectMapper.
*/
private static class GenericObject extends Base<Object> {
public GenericObject(ObjectMapper objectMapper, Type type, int dbType, String pgType) {
super(Object.class, objectMapper, type, dbType, pgType, DocPropertyType.OBJECT);
}
}
/**
* Type for Sets wrapping the ObjectMapper Set as a ModifyAwareSet.
*/
private static class OmSet extends Base<Set> {
public OmSet(ObjectMapper objectMapper, Type type, int dbType, String pgType, DocPropertyType docType) {
super(Set.class, objectMapper, type, dbType, pgType, docType);
}
@Override
@SuppressWarnings("unchecked")
public Set read(DataReader reader) throws SQLException {
Set value = super.read(reader);
return value == null ? null : new ModifyAwareSet(value);
}
}
/**
* Type for Lists wrapping the ObjectMapper List as a ModifyAwareList.
*/
private static class OmList extends Base<List> {
public OmList(ObjectMapper objectMapper, Type type, int dbType, String pgType, DocPropertyType docType) {
super(List.class, objectMapper, type, dbType, pgType, docType);
}
@Override
@SuppressWarnings("unchecked")
public List read(DataReader reader) throws SQLException {
List value = super.read(reader);
return value == null ? null : new ModifyAwareList(value);
}
}
/**
* Type for Map wrapping the ObjectMapper Map as a ModifyAwareMap.
*/
private static class OmMap extends Base<Map> {
public OmMap(ObjectMapper objectMapper, Type type, int dbType, String pgType) {
super(Map.class, objectMapper, type, dbType, pgType, DocPropertyType.OBJECT);
}
@Override
@SuppressWarnings("unchecked")
public Map read(DataReader reader) throws SQLException {
Map value = super.read(reader);
return value == null ? null : new ModifyAwareMap(value);
}
}
/**
* ScalarType that uses Jackson ObjectMapper to marshall/unmarshall to/from JSON
* and storing them in one of JSON, JSONB, VARCHAR, CLOB or BLOB.
*/
private static abstract class Base<T> extends ScalarTypeBase<T> {
private final ObjectMapper objectMapper;
private final JavaType javaType;
private final String pgType;
private final DocPropertyType docType;
/**
* Construct given the object mapper, property type and DB type for storage.
*/
public Base(Class<T> cls, ObjectMapper objectMapper, Type type, int dbType, String pgType, DocPropertyType docType) {
super(cls, false, dbType);
this.pgType = pgType;
this.docType = docType;
this.objectMapper = objectMapper;
this.javaType = objectMapper.getTypeFactory().constructType(type);
}
/**
* Consider as a mutable type. Use the isDirty() method to check for dirty state.
*/
@Override
public boolean isMutable() {
return true;
}
/**
* Return true if the value should be considered dirty (and included in an update).
*/
@Override
public boolean isDirty(Object value) {
return !(value instanceof ModifyAwareOwner) || ((ModifyAwareOwner) value).isMarkedDirty();
}
@Override
public T read(DataReader reader) throws SQLException {
String json = reader.getString();
if (json == null || json.isEmpty()) {
return null;
}
try {
return objectMapper.readValue(json, javaType);
} catch (IOException e) {
throw new SQLException("Unable to convert JSON", e);
}
}
@Override
public void bind(DataBind bind, T value) throws SQLException {
if (pgType != null) {
String rawJson = (value == null) ? null : formatValue(value);
bind.setObject(PostgresHelper.asObject(pgType, rawJson));
} else {
if (value == null) {
bind.setNull(jdbcType);
} else {
try {
String json = objectMapper.writeValueAsString(value);
bind.setString(json);
} catch (JsonProcessingException e) {
throw new SQLException("Unable to create JSON", e);
}
}
}
}
@Override
public Object toJdbcType(Object value) {
// no type conversion supported
return value;
}
@Override
@SuppressWarnings("unchecked")
public T toBeanType(Object value) {
// no type conversion supported
return (T) value;
}
@Override
public String formatValue(T value) {
try {
return objectMapper.writeValueAsString(value);
} catch (JsonProcessingException e) {
throw new PersistenceException("Unable to create JSON", e);
}
}
@Override
public T parse(String value) {
try {
return objectMapper.readValue(value, javaType);
} catch (IOException e) {
throw new PersistenceException("Unable to convert JSON", e);
}
}
@Override
public DocPropertyType getDocType() {
return docType;
}
@Override
public boolean isDateTimeCapable() {
return false;
}
@Override
public T convertFromMillis(long dateTime) {
throw new IllegalStateException("Not supported");
}
@Override
public T jsonRead(JsonParser parser) throws IOException {
return objectMapper.readValue(parser, javaType);
}
@Override
public void jsonWrite(JsonGenerator writer, T value) throws IOException {
objectMapper.writeValue(writer, value);
}
@Override
public T readData(DataInput dataInput) throws IOException {
if (!dataInput.readBoolean()) {
return null;
} else {
return parse(dataInput.readUTF());
}
}
@Override
public void writeData(DataOutput dataOutput, T value) throws IOException {
if (value == null) {
dataOutput.writeBoolean(false);
} else {
ScalarHelp.writeUTF(dataOutput, format(value));
}
}
}
}