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SQL codegen support for Querydsl
/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* 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.querydsl.sql.codegen;
import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.nio.charset.Charset;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.*;
import javax.annotation.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.io.Files;
import com.mysema.codegen.CodeWriter;
import com.mysema.codegen.JavaWriter;
import com.mysema.codegen.ScalaWriter;
import com.mysema.codegen.model.ClassType;
import com.mysema.codegen.model.SimpleType;
import com.mysema.codegen.model.Type;
import com.mysema.codegen.model.TypeCategory;
import com.querydsl.codegen.*;
import com.querydsl.sql.*;
import com.querydsl.sql.codegen.support.*;
/**
* {@code MetadataExporter} exports JDBC metadata to Querydsl query types
*
* Example
*
*
* MetaDataExporter exporter = new MetaDataExporter();
* exporter.setPackageName("com.example.domain");
* exporter.setTargetFolder(new File("target/generated-sources/java"));
* exporter.export(connection.getMetaData());
*
*
* @author tiwe
*/
public class MetaDataExporter {
private static final Logger logger = LoggerFactory.getLogger(MetaDataExporter.class);
private final SQLTemplatesRegistry sqlTemplatesRegistry = new SQLTemplatesRegistry();
private final SQLCodegenModule module = new SQLCodegenModule();
private final Set classes = new HashSet();
private File targetFolder;
private File beansTargetFolder;
@Nullable
private String beanPackageName;
@Nullable
private String schemaPattern, tableNamePattern;
@Nullable
private Serializer beanSerializer;
private boolean createScalaSources = false;
private final Map entityToWrapped = new HashMap();
private Serializer serializer;
private TypeMappings typeMappings;
private QueryTypeFactory queryTypeFactory;
private NamingStrategy namingStrategy;
private Configuration configuration;
private KeyDataFactory keyDataFactory;
private boolean columnAnnotations = false;
private boolean validationAnnotations = false;
private boolean schemaToPackage = false;
private String sourceEncoding = "UTF-8";
private boolean lowerCase = false;
private boolean exportTables = true;
private boolean exportViews = true;
private boolean exportAll = false;
private boolean exportPrimaryKeys = true;
private boolean exportForeignKeys = true;
private boolean exportDirectForeignKeys = true;
private boolean exportInverseForeignKeys = true;
private boolean spatial = false;
@Nullable
private String tableTypesToExport;
public MetaDataExporter() { }
protected EntityType createEntityType(SchemaAndTable schemaAndTable,
final String className) {
EntityType classModel;
if (beanSerializer == null) {
String packageName = normalizePackage(module.getPackageName(), schemaAndTable);
String simpleName = module.getPrefix() + className + module.getSuffix();
Type classTypeModel = new SimpleType(TypeCategory.ENTITY,
packageName + "." + simpleName, packageName, simpleName, false, false);
classModel = new EntityType(classTypeModel, module.get(Function.class, CodegenModule.VARIABLE_NAME_FUNCTION_CLASS));
typeMappings.register(classModel, classModel);
} else {
String beanPackage = normalizePackage(beanPackageName, schemaAndTable);
String simpleName = module.getBeanPrefix() + className + module.getBeanSuffix();
Type classTypeModel = new SimpleType(TypeCategory.ENTITY,
beanPackage + "." + simpleName, beanPackage, simpleName, false, false);
classModel = new EntityType(classTypeModel, module.get(Function.class, CodegenModule.VARIABLE_NAME_FUNCTION_CLASS));
Type mappedType = queryTypeFactory.create(classModel);
entityToWrapped.put(classModel, mappedType);
typeMappings.register(classModel, mappedType);
}
classModel.getData().put("schema", schemaAndTable.getSchema());
classModel.getData().put("table", schemaAndTable.getTable());
return classModel;
}
private String normalizePackage(String packageName, SchemaAndTable schemaAndTable) {
String rval = packageName;
if (schemaToPackage) {
rval = namingStrategy.getPackage(rval, schemaAndTable);
}
return rval;
}
protected Property createProperty(EntityType classModel, String normalizedColumnName,
String propertyName, Type typeModel) {
return new Property(
classModel,
propertyName,
propertyName,
typeModel,
Collections.emptyList(),
false);
}
/**
* Export the tables based on the given database metadata
*
* @param md database metadata
* @throws SQLException
*/
public void export(DatabaseMetaData md) throws SQLException {
if (beanPackageName == null) {
beanPackageName = module.getPackageName();
}
if (beansTargetFolder == null) {
beansTargetFolder = targetFolder;
}
module.bind(SQLCodegenModule.BEAN_PACKAGE_NAME, beanPackageName);
if (spatial) {
SpatialSupport.addSupport(module);
}
classes.clear();
typeMappings = module.get(TypeMappings.class);
queryTypeFactory = module.get(QueryTypeFactory.class);
serializer = module.get(Serializer.class);
beanSerializer = module.get(Serializer.class, SQLCodegenModule.BEAN_SERIALIZER);
namingStrategy = module.get(NamingStrategy.class);
configuration = module.get(Configuration.class);
SQLTemplates templates = sqlTemplatesRegistry.getTemplates(md);
if (templates != null) {
configuration.setTemplates(templates);
} else {
logger.info("Found no specific dialect for " + md.getDatabaseProductName());
}
if (beanSerializer == null) {
keyDataFactory = new KeyDataFactory(namingStrategy, module.getPackageName(),
module.getPrefix(), module.getSuffix(), schemaToPackage);
} else {
keyDataFactory = new KeyDataFactory(namingStrategy, beanPackageName,
module.getBeanPrefix(), module.getBeanSuffix(), schemaToPackage);
}
String[] typesArray = null;
if (tableTypesToExport != null && !tableTypesToExport.isEmpty()) {
List types = new ArrayList();
for (String tableType : tableTypesToExport.split(",")) {
types.add(tableType.trim());
}
typesArray = types.toArray(new String[types.size()]);
} else if (!exportAll) {
List types = new ArrayList(2);
if (exportTables) {
types.add("TABLE");
}
if (exportViews) {
types.add("VIEW");
}
typesArray = types.toArray(new String[types.size()]);
}
List schemas = Arrays.asList(schemaPattern);
if (schemaPattern != null && schemaPattern.contains(",")) {
schemas = ImmutableList.copyOf(schemaPattern.split(","));
}
List tables = Arrays.asList(tableNamePattern);
if (tableNamePattern != null && tableNamePattern.contains(",")) {
tables = ImmutableList.copyOf(tableNamePattern.split(","));
}
for (String schema : schemas) {
schema = schema != null ? schema.trim() : null;
for (String table : tables) {
table = table != null ? table.trim() : null;
handleTables(md, schema, table, typesArray);
}
}
}
private void handleTables(DatabaseMetaData md, String schemaPattern, String tablePattern, String[] types) throws SQLException {
ResultSet tables = md.getTables(null, schemaPattern, tablePattern, types);
try {
while (tables.next()) {
handleTable(md, tables);
}
} finally {
tables.close();
}
}
Set getClasses() {
return classes;
}
private void handleColumn(EntityType classModel, String tableName, ResultSet columns) throws SQLException {
String columnName = normalize(columns.getString("COLUMN_NAME"));
String normalizedColumnName = namingStrategy.normalizeColumnName(columnName);
int columnType = columns.getInt("DATA_TYPE");
String typeName = columns.getString("TYPE_NAME");
Number columnSize = (Number) columns.getObject("COLUMN_SIZE");
Number columnDigits = (Number) columns.getObject("DECIMAL_DIGITS");
int columnIndex = columns.getInt("ORDINAL_POSITION");
int nullable = columns.getInt("NULLABLE");
String propertyName = namingStrategy.getPropertyName(normalizedColumnName, classModel);
Class clazz = configuration.getJavaType(columnType,
typeName,
columnSize != null ? columnSize.intValue() : 0,
columnDigits != null ? columnDigits.intValue() : 0,
tableName, columnName);
if (clazz == null) {
clazz = Object.class;
}
TypeCategory fieldType = TypeCategory.get(clazz.getName());
if (Number.class.isAssignableFrom(clazz)) {
fieldType = TypeCategory.NUMERIC;
} else if (Enum.class.isAssignableFrom(clazz)) {
fieldType = TypeCategory.ENUM;
}
Type typeModel = new ClassType(fieldType, clazz);
Property property = createProperty(classModel, normalizedColumnName, propertyName, typeModel);
ColumnMetadata column = ColumnMetadata.named(normalizedColumnName).ofType(columnType).withIndex(columnIndex);
if (nullable == DatabaseMetaData.columnNoNulls) {
column = column.notNull();
}
if (columnSize != null) {
column = column.withSize(columnSize.intValue());
}
if (columnDigits != null) {
column = column.withDigits(columnDigits.intValue());
}
property.getData().put("COLUMN", column);
if (columnAnnotations) {
property.addAnnotation(new ColumnImpl(normalizedColumnName));
}
if (validationAnnotations) {
if (nullable == DatabaseMetaData.columnNoNulls) {
property.addAnnotation(new NotNullImpl());
}
int size = columns.getInt("COLUMN_SIZE");
if (size > 0 && clazz.equals(String.class)) {
property.addAnnotation(new SizeImpl(0, size));
}
}
classModel.addProperty(property);
}
private void handleTable(DatabaseMetaData md, ResultSet tables) throws SQLException {
String catalog = tables.getString("TABLE_CAT");
String schema = tables.getString("TABLE_SCHEM");
String schemaName = normalize(tables.getString("TABLE_SCHEM"));
String tableName = normalize(tables.getString("TABLE_NAME"));
String normalizedSchemaName = namingStrategy.normalizeSchemaName(schemaName);
String normalizedTableName = namingStrategy.normalizeTableName(tableName);
SchemaAndTable schemaAndTable = new SchemaAndTable(
normalizedSchemaName, normalizedTableName);
if (!namingStrategy.shouldGenerateClass(schemaAndTable)) {
return;
}
String className = namingStrategy.getClassName(schemaAndTable);
EntityType classModel = createEntityType(schemaAndTable, className);
if (exportPrimaryKeys) {
// collect primary keys
Map primaryKeyData = keyDataFactory
.getPrimaryKeys(md, catalog, schema, tableName);
if (!primaryKeyData.isEmpty()) {
classModel.getData().put(PrimaryKeyData.class, primaryKeyData.values());
}
}
if (exportForeignKeys) {
if (exportDirectForeignKeys) {
// collect foreign keys
Map foreignKeyData = keyDataFactory
.getImportedKeys(md, catalog, schema, tableName);
if (!foreignKeyData.isEmpty()) {
Collection foreignKeysToGenerate = new HashSet();
for (ForeignKeyData fkd : foreignKeyData.values()) {
if (namingStrategy.shouldGenerateForeignKey(schemaAndTable, fkd)) {
foreignKeysToGenerate.add(fkd);
}
}
if (!foreignKeysToGenerate.isEmpty()) {
classModel.getData().put(ForeignKeyData.class, foreignKeysToGenerate);
}
}
}
if (exportInverseForeignKeys) {
// collect inverse foreign keys
Map inverseForeignKeyData = keyDataFactory
.getExportedKeys(md, catalog, schema, tableName);
if (!inverseForeignKeyData.isEmpty()) {
classModel.getData().put(InverseForeignKeyData.class, inverseForeignKeyData.values());
}
}
}
// collect columns
ResultSet columns = md.getColumns(catalog, schema, tableName.replace("/", "//"), null);
try {
while (columns.next()) {
handleColumn(classModel, tableName, columns);
}
} finally {
columns.close();
}
// serialize model
serialize(classModel, schemaAndTable);
logger.info("Exported " + tableName + " successfully");
}
private String normalize(String str) {
if (lowerCase && str != null) {
return str.toLowerCase();
} else {
return str;
}
}
private void serialize(EntityType type, SchemaAndTable schemaAndTable) {
try {
String fileSuffix = createScalaSources ? ".scala" : ".java";
if (beanSerializer != null) {
String packageName = normalizePackage(beanPackageName, schemaAndTable);
String path = packageName.replace('.', '/') + "/" + type.getSimpleName() + fileSuffix;
write(beanSerializer, new File(beansTargetFolder, path), type);
String otherPath = entityToWrapped.get(type).getFullName().replace('.', '/') + fileSuffix;
write(serializer, new File(targetFolder, otherPath), type);
} else {
String packageName = normalizePackage(module.getPackageName(), schemaAndTable);
String path = packageName.replace('.', '/') + "/" + type.getSimpleName() + fileSuffix;
write(serializer, new File(targetFolder, path), type);
}
} catch (IOException e) {
throw new RuntimeException(e.getMessage(), e);
}
}
private void write(Serializer serializer, File targetFile, EntityType type) throws IOException {
if (!classes.add(targetFile.getPath())) {
throw new IllegalStateException("Attempted to write multiple times to " +
targetFile.getPath() + ", please check your configuration");
}
StringWriter w = new StringWriter();
CodeWriter writer = createScalaSources ? new ScalaWriter(w) : new JavaWriter(w);
serializer.serialize(type, SimpleSerializerConfig.DEFAULT, writer);
// conditional creation
boolean generate = true;
byte[] bytes = w.toString().getBytes(sourceEncoding);
if (targetFile.exists() && targetFile.length() == bytes.length) {
String str = Files.toString(targetFile, Charset.forName(sourceEncoding));
if (str.equals(w.toString())) {
generate = false;
}
} else {
targetFile.getParentFile().mkdirs();
}
if (generate) {
Files.write(bytes, targetFile);
}
}
/**
* Set the schema pattern filter to be used
*
* @param schemaPattern a schema name pattern; must match the schema name
* as it is stored in the database; "" retrieves those without a schema;
* {@code null} means that the schema name should not be used to narrow
* the search (default: null)
*/
public void setSchemaPattern(@Nullable String schemaPattern) {
this.schemaPattern = schemaPattern;
}
/**
* Set the table name pattern filter to be used
*
* @param tableNamePattern a table name pattern; must match the
* table name as it is stored in the database (default: null)
*/
public void setTableNamePattern(@Nullable String tableNamePattern) {
this.tableNamePattern = tableNamePattern;
}
/**
* Override the configuration
*
* @param configuration override configuration for custom type mappings etc
*/
public void setConfiguration(Configuration configuration) {
module.bind(Configuration.class, configuration);
}
/**
* Set true to create Scala sources instead of Java sources
*
* @param createScalaSources whether to create Scala sources (default: false)
*/
public void setCreateScalaSources(boolean createScalaSources) {
this.createScalaSources = createScalaSources;
}
/**
* Set the target folder
*
* @param targetFolder target source folder to create the sources into
* (e.g. target/generated-sources/java)
*/
public void setTargetFolder(File targetFolder) {
this.targetFolder = targetFolder;
}
/**
* Set the target folder for beans
*
* defaults to the targetFolder value
*
* @param targetFolder target source folder to create the bean sources into
*/
public void setBeansTargetFolder(File targetFolder) {
this.beansTargetFolder = targetFolder;
}
/**
* Set the package name
*
* @param packageName package name for sources
*/
public void setPackageName(String packageName) {
module.bind(SQLCodegenModule.PACKAGE_NAME, packageName);
}
/**
* Override the bean package name (default: packageName)
*
* @param beanPackageName package name for bean sources
*/
public void setBeanPackageName(@Nullable String beanPackageName) {
this.beanPackageName = beanPackageName;
}
/**
* Override the name prefix for the classes (default: Q)
*
* @param namePrefix name prefix for querydsl-types (default: Q)
*/
public void setNamePrefix(String namePrefix) {
module.bind(CodegenModule.PREFIX, namePrefix);
}
/**
* Override the name suffix for the classes (default: "")
*
* @param nameSuffix name suffix for querydsl-types (default: "")
*/
public void setNameSuffix(String nameSuffix) {
module.bind(CodegenModule.SUFFIX, nameSuffix);
}
/**
* Override the bean prefix for the classes (default: "")
*
* @param beanPrefix bean prefix for bean-types (default: "")
*/
public void setBeanPrefix(String beanPrefix) {
module.bind(SQLCodegenModule.BEAN_PREFIX, beanPrefix);
}
/**
* Override the bean suffix for the classes (default: "")
*
* @param beanSuffix bean suffix for bean-types (default: "")
*/
public void setBeanSuffix(String beanSuffix) {
module.bind(SQLCodegenModule.BEAN_SUFFIX, beanSuffix);
}
/**
* Override the NamingStrategy (default: new DefaultNamingStrategy())
*
* @param namingStrategy naming strategy to override (default: new DefaultNamingStrategy())
*/
public void setNamingStrategy(NamingStrategy namingStrategy) {
module.bind(NamingStrategy.class, namingStrategy);
}
/**
* Set the Bean serializer to create bean types as well
*
* @param beanSerializer serializer for JavaBeans (default: null)
*/
public void setBeanSerializer(@Nullable Serializer beanSerializer) {
module.bind(SQLCodegenModule.BEAN_SERIALIZER, beanSerializer);
}
/**
* Set the Bean serializer class to create bean types as well
*
* @param beanSerializerClass serializer for JavaBeans (default: null)
*/
public void setBeanSerializerClass(Class beanSerializerClass) {
module.bind(SQLCodegenModule.BEAN_SERIALIZER, beanSerializerClass);
}
/**
* Set whether inner classes should be created for keys
*
* @param innerClassesForKeys
*/
public void setInnerClassesForKeys(boolean innerClassesForKeys) {
module.bind(SQLCodegenModule.INNER_CLASSES_FOR_KEYS, innerClassesForKeys);
}
/**
* Set the column comparator class
*
* @param columnComparatorClass
*/
public void setColumnComparatorClass(Class> columnComparatorClass) {
module.bind(SQLCodegenModule.COLUMN_COMPARATOR, columnComparatorClass);
}
/**
* Set the serializer class
*
* @param serializerClass
*/
public void setSerializerClass(Class serializerClass) {
module.bind(Serializer.class, serializerClass);
}
/**
* Set the type mappings to use
*
* @param typeMappings
*/
public void setTypeMappings(TypeMappings typeMappings) {
module.bind(TypeMappings.class, typeMappings);
}
/**
* Set whether column annotations should be created
*
* @param columnAnnotations
*/
public void setColumnAnnotations(boolean columnAnnotations) {
this.columnAnnotations = columnAnnotations;
}
/**
* Set whether validation annotations should be created
*
* @param validationAnnotations
*/
public void setValidationAnnotations(boolean validationAnnotations) {
this.validationAnnotations = validationAnnotations;
}
/**
* Set the source encoding
*
* @param sourceEncoding
*/
public void setSourceEncoding(String sourceEncoding) {
this.sourceEncoding = sourceEncoding;
}
/**
* Set whether schema names should be appended to the package name.
*
* !!! Important !!! {@link NamingStrategy#getPackage(String, SchemaAndTable)}
* will be invoked only if schemaToPackage is set to true.
*
* @deprecated This flag will not be necessary in the future because the generated package name
* can be controlled in method {@link NamingStrategy#getPackage(String, SchemaAndTable)}.
*
* @param schemaToPackage
*/
@Deprecated
public void setSchemaToPackage(boolean schemaToPackage) {
this.schemaToPackage = schemaToPackage;
module.bind(SQLCodegenModule.SCHEMA_TO_PACKAGE, schemaToPackage);
}
/**
* Set whether names should be normalized to lowercase
*
* @param lowerCase
*/
public void setLowerCase(boolean lowerCase) {
this.lowerCase = lowerCase;
}
/**
* Set whether tables should be exported
*
* @param exportTables
*/
public void setExportTables(boolean exportTables) {
this.exportTables = exportTables;
}
/**
* Set whether views should be exported
*
* @param exportViews
*/
public void setExportViews(boolean exportViews) {
this.exportViews = exportViews;
}
/**
* Set whether all table types should be exported
*
* @param exportAll
*/
public void setExportAll(boolean exportAll) {
this.exportAll = exportAll;
}
/**
* Set whether primary keys should be exported
*
* @param exportPrimaryKeys
*/
public void setExportPrimaryKeys(boolean exportPrimaryKeys) {
this.exportPrimaryKeys = exportPrimaryKeys;
}
/**
* Set whether foreign keys should be exported
*
* @param exportForeignKeys
*/
public void setExportForeignKeys(boolean exportForeignKeys) {
this.exportForeignKeys = exportForeignKeys;
}
/**
* Set whether direct foreign keys should be exported
*
* @param exportDirectForeignKeys
*/
public void setExportDirectForeignKeys(boolean exportDirectForeignKeys) {
this.exportDirectForeignKeys = exportDirectForeignKeys;
}
/**
* Set whether inverse foreign keys should be exported
*
* @param exportInverseForeignKeys
*/
public void setExportInverseForeignKeys(boolean exportInverseForeignKeys) {
this.exportInverseForeignKeys = exportInverseForeignKeys;
}
/**
* Set the java imports
*
* @param imports
* java imports array
*/
public void setImports(String[] imports) {
module.bind(CodegenModule.IMPORTS, new HashSet(Arrays.asList(imports)));
}
/**
* Set whether spatial type support should be used
*
* @param spatial
*/
public void setSpatial(boolean spatial) {
this.spatial = spatial;
}
/**
* Set the table types to export as a comma separated string
*
* @param tableTypesToExport
*/
public void setTableTypesToExport(String tableTypesToExport) {
this.tableTypesToExport = tableTypesToExport;
}
}
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