/*
* Copyright 2011, Mysema Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.mysema.query.sql.dml;
import javax.annotation.Nullable;
import java.sql.*;
import java.util.*;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.mysema.query.DefaultQueryMetadata;
import com.mysema.query.JoinType;
import com.mysema.query.QueryFlag;
import com.mysema.query.QueryFlag.Position;
import com.mysema.query.QueryMetadata;
import com.mysema.query.dml.InsertClause;
import com.mysema.query.sql.*;
import com.mysema.query.sql.types.Null;
import com.mysema.query.types.*;
import com.mysema.util.ResultSetAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* SQLInsertClause defines an INSERT INTO clause
*
* @author tiwe
*
*/
public class SQLInsertClause extends AbstractSQLClause<SQLInsertClause> implements
InsertClause<SQLInsertClause> {
private static final Logger logger = LoggerFactory.getLogger(SQLInsertClause.class);
private final Connection connection;
private final RelationalPath<?> entity;
private final QueryMetadata metadata = new DefaultQueryMetadata();
@Nullable
private SubQueryExpression<?> subQuery;
@Nullable
private AbstractSQLSubQuery<?> subQueryBuilder;
private final List<SQLInsertBatch> batches = new ArrayList<SQLInsertBatch>();
private final List<Path<?>> columns = new ArrayList<Path<?>>();
private final List<Expression<?>> values = new ArrayList<Expression<?>>();
private transient String queryString;
private transient List<Object> constants;
public SQLInsertClause(Connection connection, SQLTemplates templates, RelationalPath<?> entity) {
this(connection, new Configuration(templates), entity);
}
public SQLInsertClause(Connection connection, SQLTemplates templates, RelationalPath<?> entity,
AbstractSQLSubQuery<?> subQuery) {
this(connection, new Configuration(templates), entity);
this.subQueryBuilder = subQuery;
}
public SQLInsertClause(Connection connection, Configuration configuration,
RelationalPath<?> entity, AbstractSQLSubQuery<?> subQuery) {
this(connection, configuration, entity);
this.subQueryBuilder = subQuery;
}
public SQLInsertClause(Connection connection, Configuration configuration,
RelationalPath<?> entity) {
super(configuration);
this.connection = connection;
this.entity = entity;
metadata.addJoin(JoinType.DEFAULT, entity);
}
/**
* Add the given String literal at the given position as a query flag
*
* @param position
* @param flag
* @return
*/
public SQLInsertClause addFlag(Position position, String flag) {
metadata.addFlag(new QueryFlag(position, flag));
return this;
}
/**
* Add the given Expression at the given position as a query flag
*
* @param position
* @param flag
* @return
*/
public SQLInsertClause addFlag(Position position, Expression<?> flag) {
metadata.addFlag(new QueryFlag(position, flag));
return this;
}
/**
* Add the current state of bindings as a batch item
*
* @return
*/
public SQLInsertClause addBatch() {
if (subQueryBuilder != null) {
subQuery = subQueryBuilder.list(values.toArray(new Expression[values.size()]));
values.clear();
}
batches.add(new SQLInsertBatch(columns, values, subQuery));
columns.clear();
values.clear();
subQuery = null;
return this;
}
@Override
public SQLInsertClause columns(Path<?>... columns) {
this.columns.addAll(Arrays.asList(columns));
return this;
}
/**
* Execute the clause and return the generated key with the type of the
* given path. If no rows were created, null is returned, otherwise the key
* of the first row is returned.
*
* @param <T>
* @param path
* @return
*/
@SuppressWarnings("unchecked")
@Nullable
public <T> T executeWithKey(Path<T> path) {
return executeWithKey((Class<T>) path.getType(), path);
}
/**
* Execute the clause and return the generated key cast to the given type.
* If no rows were created, null is returned, otherwise the key of the first
* row is returned.
*
* @param <T>
* @param type
* @return
*/
public <T> T executeWithKey(Class<T> type) {
return executeWithKey(type, null);
}
private <T> T executeWithKey(Class<T> type, @Nullable Path<T> path) {
ResultSet rs = executeWithKeys();
try {
if (rs.next()) {
return configuration.get(rs, path, 1, type);
} else {
return null;
}
} catch (SQLException e) {
throw configuration.translate(e);
} finally {
close(rs);
}
}
/**
* Execute the clause and return the generated key with the type of the
* given path. If no rows were created, or the referenced column is not a
* generated key, null is returned. Otherwise, the key of the first row is
* returned.
*
* @param <T>
* @param path
* @return
*/
@SuppressWarnings("unchecked")
public <T> List<T> executeWithKeys(Path<T> path) {
return executeWithKeys((Class<T>) path.getType(), path);
}
public <T> List<T> executeWithKeys(Class<T> type) {
return executeWithKeys(type, null);
}
private <T> List<T> executeWithKeys(Class<T> type, @Nullable Path<T> path) {
ResultSet rs = executeWithKeys();
try {
List<T> rv = new ArrayList<T>();
while (rs.next()) {
rv.add(configuration.get(rs, path, 1, type));
}
return rv;
} catch (SQLException e) {
throw configuration.translate(e);
} finally {
close(rs);
}
}
private PreparedStatement createStatement(boolean withKeys) throws SQLException {
listeners.preRender(context);
SQLSerializer serializer = createSerializer();
if (subQueryBuilder != null) {
subQuery = subQueryBuilder.list(values.toArray(new Expression[values.size()]));
values.clear();
}
serializer.serializeInsert(metadata, entity, columns, values, subQuery);
context.addSQL(serializer.toString());
listeners.rendered(context);
return prepareStatementAndSetParameters(serializer, withKeys);
}
private Collection<PreparedStatement> createStatements(boolean withKeys) throws SQLException {
listeners.preRender(context);
if (subQueryBuilder != null) {
subQuery = subQueryBuilder.list(values.toArray(new Expression[values.size()]));
values.clear();
}
Map<String, PreparedStatement> stmts = Maps.newHashMap();
// add first batch
SQLSerializer serializer = createSerializer();
serializer.serializeInsert(metadata, entity, batches.get(0).getColumns(), batches
.get(0).getValues(), batches.get(0).getSubQuery());
PreparedStatement stmt = prepareStatementAndSetParameters(serializer, withKeys);
stmt.addBatch();
stmts.put(serializer.toString(), stmt);
context.addSQL(serializer.toString());
listeners.rendered(context);
// add other batches
for (int i = 1; i < batches.size(); i++) {
SQLInsertBatch batch = batches.get(i);
listeners.preRender(context);
serializer = createSerializer();
serializer.serializeInsert(metadata, entity, batch.getColumns(),
batch.getValues(), batch.getSubQuery());
context.addSQL(serializer.toString());
listeners.rendered(context);
stmt = stmts.get(serializer.toString());
if (stmt == null) {
stmt = prepareStatementAndSetParameters(serializer, withKeys);
stmts.put(serializer.toString(), stmt);
} else {
setParameters(stmt, serializer.getConstants(), serializer.getConstantPaths(),
metadata.getParams());
}
stmt.addBatch();
}
return stmts.values();
}
private PreparedStatement prepareStatementAndSetParameters(SQLSerializer serializer,
boolean withKeys) throws SQLException {
listeners.prePrepare(context);
queryString = serializer.toString();
constants = serializer.getConstants();
logger.debug(queryString);
PreparedStatement stmt;
if (withKeys) {
if (entity.getPrimaryKey() != null) {
String[] target = new String[entity.getPrimaryKey().getLocalColumns().size()];
for (int i = 0; i < target.length; i++) {
Path<?> path = entity.getPrimaryKey().getLocalColumns().get(i);
String column = ColumnMetadata.getName(path);
target[i] = column;
}
stmt = connection.prepareStatement(queryString, target);
} else {
stmt = connection.prepareStatement(queryString, Statement.RETURN_GENERATED_KEYS);
}
} else {
stmt = connection.prepareStatement(queryString);
}
setParameters(stmt, serializer.getConstants(), serializer.getConstantPaths(),
metadata.getParams());
context.addPreparedStatement(stmt);
listeners.prepared(context);
return stmt;
}
/**
* Execute the clause and return the generated keys as a ResultSet
*
* @return
*/
public ResultSet executeWithKeys() {
context = startContext(connection, metadata, entity);
try {
PreparedStatement stmt = null;
if (batches.isEmpty()) {
stmt = createStatement(true);
listeners.notifyInsert(entity, metadata, columns, values, subQuery);
listeners.preExecute(context);
stmt.executeUpdate();
listeners.preExecute(context);
} else {
Collection<PreparedStatement> stmts = createStatements(true);
if (stmts != null && stmts.size() > 1) {
throw new IllegalStateException("executeWithKeys called with batch statement and multiple SQL strings");
}
stmt = stmts.iterator().next();
listeners.notifyInserts(entity, metadata, batches);
listeners.preExecute(context);
stmt.executeBatch();
listeners.executed(context);
}
final Statement stmt2 = stmt;
ResultSet rs = stmt.getGeneratedKeys();
return new ResultSetAdapter(rs) {
@Override
public void close() throws SQLException {
try {
super.close();
} finally {
stmt2.close();
}
}
};
} catch (SQLException e) {
onException(context,e);
throw configuration.translate(queryString, constants, e);
} finally {
endContext(context);
}
}
@Override
public long execute() {
context = startContext(connection,metadata,entity);
PreparedStatement stmt = null;
Collection<PreparedStatement> stmts = null;
try {
if (batches.isEmpty()) {
stmt = createStatement(false);
listeners.notifyInsert(entity, metadata, columns, values, subQuery);
listeners.preExecute(context);
int rc = stmt.executeUpdate();
listeners.executed(context);
return rc;
} else {
stmts = createStatements(false);
listeners.notifyInserts(entity, metadata, batches);
listeners.preExecute(context);
long rc = executeBatch(stmts);
listeners.executed(context);
return rc;
}
} catch (SQLException e) {
onException(context,e);
throw configuration.translate(queryString, constants, e);
} finally {
if (stmt != null) {
close(stmt);
}
if (stmts != null) {
close(stmts);
}
endContext(context);
}
}
@Override
public List<SQLBindings> getSQL() {
if (batches.isEmpty()) {
SQLSerializer serializer = createSerializer();
serializer.serializeInsert(metadata, entity, columns, values, subQuery);
return ImmutableList.of(createBindings(metadata, serializer));
} else {
ImmutableList.Builder<SQLBindings> builder = ImmutableList.builder();
for (SQLInsertBatch batch : batches) {
SQLSerializer serializer = createSerializer();
serializer.serializeInsert(metadata, entity, batch.getColumns(), batch.getValues(), batch.getSubQuery());
builder.add(createBindings(metadata, serializer));
}
return builder.build();
}
}
@Override
public SQLInsertClause select(SubQueryExpression<?> sq) {
subQuery = sq;
for (Map.Entry<ParamExpression<?>, Object> entry : sq.getMetadata().getParams().entrySet()) {
metadata.setParam((ParamExpression) entry.getKey(), entry.getValue());
}
return this;
}
@Override
public <T> SQLInsertClause set(Path<T> path, T value) {
columns.add(path);
if (value instanceof Expression<?>) {
values.add((Expression<?>) value);
} else if (value != null) {
values.add(ConstantImpl.create(value));
} else {
values.add(Null.CONSTANT);
}
return this;
}
@Override
public <T> SQLInsertClause set(Path<T> path, Expression<? extends T> expression) {
columns.add(path);
values.add(expression);
return this;
}
@Override
public <T> SQLInsertClause setNull(Path<T> path) {
columns.add(path);
values.add(Null.CONSTANT);
return this;
}
@Override
public SQLInsertClause values(Object... v) {
for (Object value : v) {
if (value instanceof Expression<?>) {
values.add((Expression<?>) value);
} else if (value != null) {
values.add(ConstantImpl.create(value));
} else {
values.add(Null.CONSTANT);
}
}
return this;
}
@Override
public String toString() {
SQLSerializer serializer = createSerializer();
serializer.serializeInsert(metadata, entity, columns, values, subQuery);
return serializer.toString();
}
/**
* Populate the INSERT clause with the properties of the given bean. The
* properties need to match the fields of the clause's entity instance.
*
* @param bean
* @return
*/
public SQLInsertClause populate(Object bean) {
return populate(bean, DefaultMapper.DEFAULT);
}
/**
* Populate the INSERT clause with the properties of the given bean using
* the given Mapper.
*
* @param obj
* @param mapper
* @return
*/
@SuppressWarnings("rawtypes")
public <T> SQLInsertClause populate(T obj, Mapper<T> mapper) {
Map<Path<?>, Object> values = mapper.createMap(entity, obj);
for (Map.Entry<Path<?>, Object> entry : values.entrySet()) {
set((Path) entry.getKey(), entry.getValue());
}
return this;
}
@Override
public boolean isEmpty() {
return values.isEmpty() && batches.isEmpty();
}
}