Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
com.mysema.query.sql.dml.SQLUpdateClause Maven / Gradle / Ivy
/*
* 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.Nonnegative;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.*;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.mysema.commons.lang.Pair;
import com.mysema.query.*;
import com.mysema.query.QueryFlag.Position;
import com.mysema.query.dml.UpdateClause;
import com.mysema.query.sql.*;
import com.mysema.query.sql.types.Null;
import com.mysema.query.types.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* SQLUpdateClause defines a UPDATE clause
*
* @author tiwe
*
*/
public class SQLUpdateClause extends AbstractSQLClause implements UpdateClause {
private static final Logger logger = LoggerFactory.getLogger(SQLInsertClause.class);
private final Connection connection;
private final RelationalPath entity;
private final List batches = new ArrayList();
private List,Expression>> updates = new ArrayList,Expression>>();
private QueryMetadata metadata = new DefaultQueryMetadata();
private transient String queryString;
private transient List constants;
public SQLUpdateClause(Connection connection, SQLTemplates templates, RelationalPath entity) {
this(connection, new Configuration(templates), entity);
}
public SQLUpdateClause(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 SQLUpdateClause 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 SQLUpdateClause 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 SQLUpdateClause addBatch() {
batches.add(new SQLUpdateBatch(metadata, updates));
updates = new ArrayList,Expression>>();
metadata = new DefaultQueryMetadata();
metadata.addJoin(JoinType.DEFAULT, entity);
return this;
}
private PreparedStatement createStatement() throws SQLException{
SQLSerializer serializer = createSerializer();
serializer.serializeUpdate(metadata, entity, updates);
queryString = serializer.toString();
constants = serializer.getConstants();
logger.debug(queryString);
PreparedStatement stmt = connection.prepareStatement(queryString);
setParameters(stmt, serializer.getConstants(), serializer.getConstantPaths(), metadata.getParams());
return stmt;
}
private Collection createStatements() throws SQLException {
SQLSerializer serializer = createSerializer();
serializer.serializeUpdate(batches.get(0).getMetadata(), entity, batches.get(0).getUpdates());
queryString = serializer.toString();
constants = serializer.getConstants();
logger.debug(queryString);
Map stmts = Maps.newHashMap();
// add first batch
PreparedStatement stmt = connection.prepareStatement(queryString);
setParameters(stmt, serializer.getConstants(), serializer.getConstantPaths(), metadata.getParams());
stmt.addBatch();
stmts.put(serializer.toString(), stmt);
// add other batches
for (int i = 1; i < batches.size(); i++) {
serializer = createSerializer();
serializer.serializeUpdate(batches.get(i).getMetadata(), entity, batches.get(i).getUpdates());
stmt = stmts.get(serializer.toString());
if (stmt == null) {
stmt = connection.prepareStatement(serializer.toString());
stmts.put(serializer.toString(), stmt);
}
setParameters(stmt, serializer.getConstants(), serializer.getConstantPaths(), metadata.getParams());
stmt.addBatch();
}
return stmts.values();
}
@Override
public long execute() {
PreparedStatement stmt = null;
Collection stmts = null;
try {
if (batches.isEmpty()) {
stmt = createStatement();
listeners.notifyUpdate(entity, metadata, updates);
return stmt.executeUpdate();
} else {
stmts = createStatements();
listeners.notifyUpdates(entity, batches);
return executeBatch(stmts);
}
} catch (SQLException e) {
throw configuration.translate(queryString, constants, e);
} finally {
if (stmt != null) {
close(stmt);
}
if (stmts != null) {
close(stmts);
}
}
}
@Override
public List getSQL() {
if (batches.isEmpty()) {
SQLSerializer serializer = createSerializer();
serializer.serializeUpdate(metadata, entity, updates);
return ImmutableList.of(createBindings(metadata, serializer));
} else {
ImmutableList.Builder builder = ImmutableList.builder();
for (SQLUpdateBatch batch : batches) {
SQLSerializer serializer = createSerializer();
serializer.serializeUpdate(batch.getMetadata(), entity, batch.getUpdates());
builder.add(createBindings(metadata, serializer));
}
return builder.build();
}
}
@Override
public SQLUpdateClause set(Path path, T value) {
if (value instanceof Expression) {
updates.add(Pair.,Expression>of(path, (Expression)value));
} else if (value != null) {
updates.add(Pair.,Expression>of(path, ConstantImpl.create(value)));
} else {
setNull(path);
}
return this;
}
@Override
public SQLUpdateClause set(Path path, Expression expression) {
if (expression != null) {
updates.add(Pair.,Expression>of(path, expression));
} else {
setNull(path);
}
return this;
}
@Override
public SQLUpdateClause setNull(Path path) {
updates.add(Pair.,Expression>of(path, Null.CONSTANT));
return this;
}
@Override
public SQLUpdateClause set(List> paths, List values) {
for (int i = 0; i < paths.size(); i++) {
if (values.get(i) instanceof Expression) {
updates.add(Pair.,Expression>of(paths.get(i), (Expression)values.get(i)));
} else if (values.get(i) != null) {
updates.add(Pair.,Expression>of(paths.get(i), ConstantImpl.create(values.get(i))));
} else {
updates.add(Pair.,Expression>of(paths.get(i), Null.CONSTANT));
}
}
return this;
}
public SQLUpdateClause where(Predicate p) {
metadata.addWhere(p);
return this;
}
@Override
public SQLUpdateClause where(Predicate... o) {
for (Predicate p : o) {
metadata.addWhere(p);
}
return this;
}
public SQLUpdateClause limit(@Nonnegative long limit) {
metadata.setModifiers(QueryModifiers.limit(limit));
return this;
}
@Override
public String toString() {
SQLSerializer serializer = createSerializer();
serializer.serializeUpdate(metadata, entity, updates);
return serializer.toString();
}
/**
* Populate the UPDATE clause with the properties of the given bean.
* The properties need to match the fields of the clause's entity instance.
* Primary key columns are skipped in the population.
*
* @param bean
* @return
*/
@SuppressWarnings("unchecked")
public SQLUpdateClause populate(Object bean) {
return populate(bean, DefaultMapper.DEFAULT);
}
/**
* Populate the UPDATE clause with the properties of the given bean using the given Mapper.
*
* @param obj
* @param mapper
* @return
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public SQLUpdateClause populate(T obj, Mapper mapper) {
Collection> primaryKeyColumns = entity.getPrimaryKey() != null
? entity.getPrimaryKey().getLocalColumns()
: Collections.>emptyList();
Map, Object> values = mapper.createMap(entity, obj);
for (Map.Entry, Object> entry : values.entrySet()) {
if (!primaryKeyColumns.contains(entry.getKey())) {
set((Path)entry.getKey(), entry.getValue());
}
}
return this;
}
@Override
public boolean isEmpty() {
return updates.isEmpty() && batches.isEmpty();
}
}
