public CacheKey createCacheKey(
MappedStatement ms, Object parameterObject, RowBounds rowBounds, BoundSql boundSql) {
if (closed) throw new ExecutorException("Executor was closed.");
CacheKey cacheKey = new CacheKey();
cacheKey.update(ms.getId());
cacheKey.update(rowBounds.getOffset());
cacheKey.update(rowBounds.getLimit());
cacheKey.update(boundSql.getSql());
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings.size() > 0 && parameterObject != null) {
TypeHandlerRegistry typeHandlerRegistry = ms.getConfiguration().getTypeHandlerRegistry();
if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
cacheKey.update(parameterObject);
} else {
MetaObject metaObject = configuration.newMetaObject(parameterObject);
for (ParameterMapping parameterMapping : parameterMappings) {
String propertyName = parameterMapping.getProperty();
if (metaObject.hasGetter(propertyName)) {
cacheKey.update(metaObject.getValue(propertyName));
} else if (boundSql.hasAdditionalParameter(propertyName)) {
cacheKey.update(boundSql.getAdditionalParameter(propertyName));
}
}
}
}
return cacheKey;
}
private void resolveTypeHandler() {
if (resultMapping.typeHandler == null && resultMapping.javaType != null) {
Configuration configuration = resultMapping.configuration;
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
resultMapping.typeHandler =
typeHandlerRegistry.getTypeHandler(resultMapping.javaType, resultMapping.jdbcType);
}
}
private Object prepareSimpleKeyParameter(
ResultSet rs, ResultMapping resultMapping, Class<?> parameterType, String columnPrefix)
throws SQLException {
final TypeHandler<?> typeHandler;
if (typeHandlerRegistry.hasTypeHandler(parameterType)) {
typeHandler = typeHandlerRegistry.getTypeHandler(parameterType);
} else {
typeHandler = typeHandlerRegistry.getUnknownTypeHandler();
}
return typeHandler.getResult(rs, prependPrefix(resultMapping.getColumn(), columnPrefix));
}
/**
* 对SQL参数(?)设值, 参考org.apache.ibatis.executor.parameter.DefaultParameterHandler。
*
* @param ps 表示预编译的 SQL 语句的对象。
* @param mappedStatement MappedStatement
* @param boundSql SQL
* @param parameterObject 参数对象
* @throws java.sql.SQLException 数据库异常
*/
@SuppressWarnings("unchecked")
public static void setParameters(
PreparedStatement ps,
MappedStatement mappedStatement,
BoundSql boundSql,
Object parameterObject)
throws SQLException {
ErrorContext.instance()
.activity("setting parameters")
.object(mappedStatement.getParameterMap().getId());
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings != null) {
Configuration configuration = mappedStatement.getConfiguration();
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
MetaObject metaObject =
parameterObject == null ? null : configuration.newMetaObject(parameterObject);
for (int i = 0; i < parameterMappings.size(); i++) {
ParameterMapping parameterMapping = parameterMappings.get(i);
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
String propertyName = parameterMapping.getProperty();
PropertyTokenizer prop = new PropertyTokenizer(propertyName);
if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
value = parameterObject;
} else if (boundSql.hasAdditionalParameter(propertyName)) {
value = boundSql.getAdditionalParameter(propertyName);
} else if (propertyName.startsWith(ForEachSqlNode.ITEM_PREFIX)
&& boundSql.hasAdditionalParameter(prop.getName())) {
value = boundSql.getAdditionalParameter(prop.getName());
if (value != null) {
value =
configuration
.newMetaObject(value)
.getValue(propertyName.substring(prop.getName().length()));
}
} else {
value = metaObject == null ? null : metaObject.getValue(propertyName);
}
@SuppressWarnings("rawtypes")
TypeHandler typeHandler = parameterMapping.getTypeHandler();
if (typeHandler == null) {
throw new ExecutorException(
"There was no TypeHandler found for parameter "
+ propertyName
+ " of statement "
+ mappedStatement.getId());
}
typeHandler.setParameter(ps, i + 1, value, parameterMapping.getJdbcType());
}
}
}
}
private Object createResultObject(
ResultSetWrapper rsw, ResultMap resultMap, ResultLoaderMap lazyLoader, String columnPrefix)
throws SQLException {
final List<Class<?>> constructorArgTypes = new ArrayList<Class<?>>();
final List<Object> constructorArgs = new ArrayList<Object>();
final Object resultObject =
createResultObject(rsw, resultMap, constructorArgTypes, constructorArgs, columnPrefix);
if (resultObject != null && !typeHandlerRegistry.hasTypeHandler(resultMap.getType())) {
final List<ResultMapping> propertyMappings = resultMap.getPropertyResultMappings();
for (ResultMapping propertyMapping : propertyMappings) {
if (propertyMapping.getNestedQueryId() != null
&& propertyMapping.isLazy()) { // issue gcode #109 && issue #149
return configuration
.getProxyFactory()
.createProxy(
resultObject,
lazyLoader,
configuration,
objectFactory,
constructorArgTypes,
constructorArgs);
}
}
}
return resultObject;
}
private boolean applyAutomaticMappings(
ResultSetWrapper rsw, ResultMap resultMap, MetaObject metaObject, String columnPrefix)
throws SQLException {
final List<String> unmappedColumnNames = rsw.getUnmappedColumnNames(resultMap, columnPrefix);
boolean foundValues = false;
for (String columnName : unmappedColumnNames) {
String propertyName = columnName;
if (columnPrefix != null && columnPrefix.length() > 0) {
// When columnPrefix is specified,
// ignore columns without the prefix.
if (columnName.toUpperCase(Locale.ENGLISH).startsWith(columnPrefix)) {
propertyName = columnName.substring(columnPrefix.length());
} else {
continue;
}
}
final String property =
metaObject.findProperty(propertyName, configuration.isMapUnderscoreToCamelCase());
if (property != null && metaObject.hasSetter(property)) {
final Class<?> propertyType = metaObject.getSetterType(property);
if (typeHandlerRegistry.hasTypeHandler(propertyType)) {
final TypeHandler<?> typeHandler = rsw.getTypeHandler(propertyType, columnName);
final Object value = typeHandler.getResult(rsw.getResultSet(), columnName);
if (value != null
|| configuration.isCallSettersOnNulls()) { // issue #377, call setter on nulls
if (value != null || !propertyType.isPrimitive()) {
metaObject.setValue(property, value);
}
foundValues = true;
}
}
}
}
return foundValues;
}
private ParameterMapping oldParseMapping(
String token, Class parameterClass, TypeHandlerRegistry typeHandlerRegistry) {
if (token.indexOf(PARAM_DELIM) > -1) {
StringTokenizer paramParser = new StringTokenizer(token, PARAM_DELIM, true);
int n1 = paramParser.countTokens();
if (n1 == 3) {
String name = paramParser.nextToken();
paramParser.nextToken(); // ignore ":"
String type = paramParser.nextToken();
TypeHandler handler;
if (parameterClass == null) {
handler = typeHandlerRegistry.getUnknownTypeHandler();
} else {
handler = resolveTypeHandler(parameterClass, name, null, JdbcType.valueOf(type));
}
ParameterMapping.Builder mapping =
new ParameterMapping.Builder(configuration, name, handler);
mapping.jdbcType(JdbcType.valueOf(type));
return mapping.build();
} else if (n1 >= 5) {
throw new UnsupportedOperationException(
"iBATIS 3 does not support null value substitution.");
} else {
throw new SqlMapException("Incorrect inline parameter map format: " + token);
}
} else {
TypeHandler handler;
if (parameterClass == null) {
handler = typeHandlerRegistry.getUnknownTypeHandler();
} else {
handler = resolveTypeHandler(parameterClass, token, null, null);
}
ParameterMapping.Builder mapping =
new ParameterMapping.Builder(configuration, token, handler);
return mapping.build();
}
}
private Object prepareCompositeKeyParameter(
ResultSet rs, ResultMapping resultMapping, Class<?> parameterType, String columnPrefix)
throws SQLException {
final Object parameterObject = instantiateParameterObject(parameterType);
final MetaObject metaObject = configuration.newMetaObject(parameterObject);
boolean foundValues = false;
for (ResultMapping innerResultMapping : resultMapping.getComposites()) {
final Class<?> propType = metaObject.getSetterType(innerResultMapping.getProperty());
final TypeHandler<?> typeHandler = typeHandlerRegistry.getTypeHandler(propType);
final Object propValue =
typeHandler.getResult(rs, prependPrefix(innerResultMapping.getColumn(), columnPrefix));
if (propValue != null) { // issue #353 & #560 do not execute nested query if key is null
metaObject.setValue(innerResultMapping.getProperty(), propValue);
foundValues = true;
}
}
return foundValues ? parameterObject : null;
}
private Object createResultObject(
ResultSetWrapper rsw,
ResultMap resultMap,
List<Class<?>> constructorArgTypes,
List<Object> constructorArgs,
String columnPrefix)
throws SQLException {
final Class<?> resultType = resultMap.getType();
final List<ResultMapping> constructorMappings = resultMap.getConstructorResultMappings();
if (typeHandlerRegistry.hasTypeHandler(resultType)) {
return createPrimitiveResultObject(rsw, resultMap, columnPrefix);
} else if (constructorMappings.size() > 0) {
return createParameterizedResultObject(
rsw, resultType, constructorMappings, constructorArgTypes, constructorArgs, columnPrefix);
} else {
return objectFactory.create(resultType);
}
}
private Object getRowValue(ResultSetWrapper rsw, ResultMap resultMap) throws SQLException {
final ResultLoaderMap lazyLoader = new ResultLoaderMap();
Object resultObject = createResultObject(rsw, resultMap, lazyLoader, null);
if (resultObject != null && !typeHandlerRegistry.hasTypeHandler(resultMap.getType())) {
final MetaObject metaObject = configuration.newMetaObject(resultObject);
boolean foundValues = resultMap.getConstructorResultMappings().size() > 0;
if (shouldApplyAutomaticMappings(
resultMap, !AutoMappingBehavior.NONE.equals(configuration.getAutoMappingBehavior()))) {
foundValues = applyAutomaticMappings(rsw, resultMap, metaObject, null) || foundValues;
}
foundValues =
applyPropertyMappings(rsw, resultMap, metaObject, lazyLoader, null) || foundValues;
foundValues = lazyLoader.size() > 0 || foundValues;
resultObject = foundValues ? resultObject : null;
return resultObject;
}
return resultObject;
}
private Object getRowValue(
ResultSetWrapper rsw,
ResultMap resultMap,
CacheKey combinedKey,
CacheKey absoluteKey,
String columnPrefix,
Object partialObject)
throws SQLException {
final String resultMapId = resultMap.getId();
Object resultObject = partialObject;
if (resultObject != null) {
final MetaObject metaObject = configuration.newMetaObject(resultObject);
putAncestor(absoluteKey, resultObject, resultMapId, columnPrefix);
applyNestedResultMappings(rsw, resultMap, metaObject, columnPrefix, combinedKey, false);
ancestorObjects.remove(absoluteKey);
} else {
final ResultLoaderMap lazyLoader = new ResultLoaderMap();
resultObject = createResultObject(rsw, resultMap, lazyLoader, columnPrefix);
if (resultObject != null && !typeHandlerRegistry.hasTypeHandler(resultMap.getType())) {
final MetaObject metaObject = configuration.newMetaObject(resultObject);
boolean foundValues = resultMap.getConstructorResultMappings().size() > 0;
if (shouldApplyAutomaticMappings(
resultMap, AutoMappingBehavior.FULL.equals(configuration.getAutoMappingBehavior()))) {
foundValues =
applyAutomaticMappings(rsw, resultMap, metaObject, columnPrefix) || foundValues;
}
foundValues =
applyPropertyMappings(rsw, resultMap, metaObject, lazyLoader, columnPrefix)
|| foundValues;
putAncestor(absoluteKey, resultObject, resultMapId, columnPrefix);
foundValues =
applyNestedResultMappings(rsw, resultMap, metaObject, columnPrefix, combinedKey, true)
|| foundValues;
ancestorObjects.remove(absoluteKey);
foundValues = lazyLoader.size() > 0 || foundValues;
resultObject = foundValues ? resultObject : null;
}
if (combinedKey != CacheKey.NULL_CACHE_KEY)
nestedResultObjects.put(combinedKey, resultObject);
}
return resultObject;
}
public void setParameters(PreparedStatement ps) throws SQLException {
ErrorContext.instance()
.activity("setting parameters")
.object(mappedStatement.getParameterMap().getId());
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings != null) {
MetaObject metaObject =
parameterObject == null ? null : configuration.newMetaObject(parameterObject);
for (int i = 0; i < parameterMappings.size(); i++) {
ParameterMapping parameterMapping = parameterMappings.get(i);
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
String propertyName = parameterMapping.getProperty();
if (boundSql.hasAdditionalParameter(
propertyName)) { // issue #448 ask first for additional params
value = boundSql.getAdditionalParameter(propertyName);
} else if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
value = parameterObject;
} else {
value = metaObject == null ? null : metaObject.getValue(propertyName);
}
TypeHandler typeHandler = parameterMapping.getTypeHandler();
if (typeHandler == null) {
throw new ExecutorException(
"There was no TypeHandler found for parameter "
+ propertyName
+ " of statement "
+ mappedStatement.getId());
}
JdbcType jdbcType = parameterMapping.getJdbcType();
if (value == null && jdbcType == null) jdbcType = configuration.getJdbcTypeForNull();
typeHandler.setParameter(ps, i + 1, value, jdbcType);
}
}
}
}
private TypeHandler resolveTypeHandler(
Class clazz, String propertyName, String javaType, JdbcType jdbcType) {
TypeHandler handler;
if (clazz == null) {
// Unknown
handler = typeHandlerRegistry.getUnknownTypeHandler();
} else if (java.util.Map.class.isAssignableFrom(clazz)) {
// Map
if (javaType == null) {
handler = typeHandlerRegistry.getUnknownTypeHandler(); // BUG 1012591 -
// typeHandlerRegistry.getTypeHandler(java.lang.Object.class, jdbcType);
} else {
try {
Class javaClass = typeAliasRegistry.resolveAlias(javaType);
handler = typeHandlerRegistry.getTypeHandler(javaClass, jdbcType);
} catch (Exception e) {
throw new SqlMapException("Error. Could not set TypeHandler. Cause: " + e, e);
}
}
} else if (typeHandlerRegistry.getTypeHandler(clazz, jdbcType) != null) {
// Primitive
handler = typeHandlerRegistry.getTypeHandler(clazz, jdbcType);
} else {
// JavaBean
if (javaType == null) {
Class type = MetaClass.forClass(clazz).getGetterType(propertyName);
handler = typeHandlerRegistry.getTypeHandler(type, jdbcType);
} else {
try {
Class javaClass = typeAliasRegistry.resolveAlias(javaType);
handler = typeHandlerRegistry.getTypeHandler(javaClass, jdbcType);
} catch (Exception e) {
throw new SqlMapException("Error. Could not set TypeHandler. Cause: " + e, e);
}
}
}
return handler;
}
private ParameterMapping newParseMapping(String token, Class parameterClass) {
// #propertyName,javaType=string,jdbcType=VARCHAR,mode=IN,nullValue=N/A,handler=string,numericScale=2#
StringTokenizer paramParser = new StringTokenizer(token, "=, ", false);
String propertyName = paramParser.nextToken();
TypeHandler typeHandler = null;
Class javaType = null;
JdbcType jdbcType = null;
ParameterMode parameterMode = null;
Integer numericScale = null;
while (paramParser.hasMoreTokens()) {
String field = paramParser.nextToken();
if (paramParser.hasMoreTokens()) {
String value = paramParser.nextToken();
if ("javaType".equals(field)) {
try {
javaType = typeAliasRegistry.resolveAlias(value);
} catch (Exception e) {
throw new SqlMapException("Error loading javaType class");
}
} else if ("jdbcType".equals(field)) {
jdbcType = JdbcType.valueOf(value);
} else if ("mode".equals(field)) {
parameterMode = ParameterMode.valueOf(value);
} else if ("nullValue".equals(field)) {
throw new UnsupportedOperationException(
"iBATIS 3 does not support null value substitution.");
} else if ("handler".equals(field)) {
try {
Object impl = typeAliasRegistry.resolveAlias(value).newInstance();
typeHandler = ((TypeHandler) impl);
} catch (Exception e) {
throw new SqlMapException(
"Error loading class specified by handler field in " + token + ". Cause: " + e, e);
}
} else if ("numericScale".equals(field)) {
try {
numericScale = Integer.valueOf(value);
if (numericScale < 0) {
throw new SqlMapException(
"Value specified for numericScale must be greater than or equal to zero");
}
} catch (NumberFormatException e) {
throw new SqlMapException("Value specified for numericScale is not a valid Integer");
}
} else {
throw new SqlMapException(
"Unrecognized parameter mapping field: '" + field + "' in " + token);
}
} else {
throw new SqlMapException(
"Incorrect inline parameter map format (missmatched name=value pairs): " + token);
}
}
if (typeHandler == null) {
if (parameterClass == null) {
typeHandler = typeHandlerRegistry.getUnknownTypeHandler();
} else {
String javaTypeString = javaType == null ? null : javaType.getName();
typeHandler = resolveTypeHandler(parameterClass, propertyName, javaTypeString, jdbcType);
}
}
if (propertyName != null && propertyName.startsWith("[")) {
propertyName = "_collection" + propertyName;
}
ParameterMapping.Builder mapping =
new ParameterMapping.Builder(configuration, propertyName, typeHandler);
mapping.javaType(javaType);
mapping.jdbcType(jdbcType);
mapping.mode(parameterMode);
mapping.numericScale(numericScale);
return mapping.build();
}