2017-05-16 16:56:53 -04:00
|
|
|
package com.moparisthebest.jdbc;
|
|
|
|
|
|
|
|
import com.moparisthebest.classgen.Compiler;
|
|
|
|
|
|
|
|
import java.lang.reflect.AccessibleObject;
|
|
|
|
import java.lang.reflect.Field;
|
|
|
|
import java.lang.reflect.Method;
|
|
|
|
import java.sql.ResultSet;
|
|
|
|
import java.sql.ResultSetMetaData;
|
|
|
|
import java.sql.SQLException;
|
|
|
|
import java.util.Calendar;
|
|
|
|
import java.util.Map;
|
|
|
|
|
|
|
|
/**
|
2017-05-17 11:18:58 -04:00
|
|
|
* Map a ResultSet row to an Object. This mapper generates/compiles/executes java code to perform the mapping.
|
|
|
|
*
|
|
|
|
* @author Travis Burtrum (modifications from beehive)
|
|
|
|
* @author Travis Burtrum
|
|
|
|
* @see RowToObjectMapper for most details, will document here where this differs
|
|
|
|
* <p>
|
|
|
|
* Usage differences:
|
|
|
|
* 1. Reflection can set non-public or final fields directly, direct java code cannot, so DTOs like that will result in
|
|
|
|
* a compilation and therefore mapping error.
|
|
|
|
* <p>
|
|
|
|
* Subclass differences:
|
|
|
|
* 1. Normally a subclass of RowToObjectMapper can overload the getMapImplementation() method to change some behavior,
|
|
|
|
* @see CaseInsensitiveMapRowToObjectMapper , but that method is never called with this implementation.
|
2017-05-16 16:56:53 -04:00
|
|
|
*/
|
|
|
|
public class CompilingRowToObjectMapper<T> extends RowToObjectMapper<T> {
|
|
|
|
protected final Compiler compiler;
|
|
|
|
protected final ResultSetToObject<T> resultSetToObject;
|
|
|
|
|
|
|
|
protected String[] keys = null; // for caching if we must generate class
|
|
|
|
|
|
|
|
public CompilingRowToObjectMapper(final Compiler compiler, final Map<CachingRowToObjectMapper.ResultSetKey, ResultSetToObject<?>> cache, ResultSet resultSet, Class<T> returnTypeClass, Calendar cal, Class<?> mapValType) {
|
|
|
|
super(resultSet, returnTypeClass, cal, mapValType);
|
|
|
|
this.compiler = compiler;
|
|
|
|
try {
|
|
|
|
final CachingRowToObjectMapper.ResultSetKey keys = new CachingRowToObjectMapper.ResultSetKey(super.getKeysFromResultSet(), _returnTypeClass);
|
|
|
|
//System.out.printf("keys: %s\n", keys);
|
|
|
|
@SuppressWarnings("unchecked")
|
|
|
|
final ResultSetToObject<T> resultSetToObject = (ResultSetToObject<T>) cache.get(keys);
|
|
|
|
if (resultSetToObject == null) {
|
|
|
|
//System.out.printf("cache miss, keys: %s\n", keys);
|
|
|
|
// generate and put into cache
|
|
|
|
this.keys = keys.keys;
|
|
|
|
cache.put(keys, this.resultSetToObject = genClass());
|
|
|
|
this.keys = null;
|
|
|
|
this._fields = null;
|
|
|
|
this._fieldTypes = null;
|
2017-05-17 13:07:08 -04:00
|
|
|
this.constructor = null;
|
2017-05-16 16:56:53 -04:00
|
|
|
} else {
|
|
|
|
//System.out.printf("cache hit, keys: %s\n", keys);
|
|
|
|
// load from cache
|
|
|
|
this.resultSetToObject = resultSetToObject;
|
|
|
|
}
|
|
|
|
} catch (SQLException e) {
|
|
|
|
throw new MapperException("CachingRowToObjectMapper: SQLException: " + e.getMessage(), e);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public T mapRowToReturnType() {
|
|
|
|
try {
|
|
|
|
return resultSetToObject.toObject(_resultSet, _cal);
|
|
|
|
} catch (SQLException e) {
|
|
|
|
throw new MapperException(e.getMessage(), e);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-05-17 13:49:36 -04:00
|
|
|
// todo: generate/cache these to make it faster for Map and MapCollection? maybe just getKey and getVal methods instead
|
|
|
|
/*
|
|
|
|
@Override
|
|
|
|
public <E> E extractColumnValue(final int index, final Class<E> classType) throws SQLException {
|
|
|
|
return super.extractColumnValue(index, classType);
|
|
|
|
}
|
|
|
|
*/
|
|
|
|
|
2017-05-16 16:56:53 -04:00
|
|
|
@Override
|
|
|
|
protected String[] getKeysFromResultSet() throws SQLException {
|
|
|
|
if (keys == null)
|
|
|
|
throw new MapperException("not supported here");
|
|
|
|
return keys;
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
protected void getFieldMappings() throws SQLException {
|
|
|
|
throw new MapperException("not supported here");
|
|
|
|
}
|
|
|
|
|
|
|
|
public interface ResultSetToObject<T> {
|
|
|
|
T toObject(final ResultSet rs, final Calendar cal) throws SQLException;
|
|
|
|
}
|
|
|
|
|
|
|
|
protected String typeFromName(final Class<?> type) {
|
2017-05-17 11:18:58 -04:00
|
|
|
if (returnMap || componentType == null)
|
|
|
|
return type.getName();
|
|
|
|
else {
|
|
|
|
// an array, annoying syntax
|
|
|
|
final String name = type.getName();
|
|
|
|
final char charType = name.charAt(1);
|
|
|
|
switch (charType) {
|
|
|
|
case 'L':
|
|
|
|
return name.substring(2, name.length() - 1) + "[]";
|
|
|
|
case 'Z':
|
|
|
|
return "boolean[]";
|
|
|
|
case 'B':
|
|
|
|
return "byte[]";
|
|
|
|
case 'C':
|
|
|
|
return "char[]";
|
|
|
|
case 'D':
|
|
|
|
return "double[]";
|
|
|
|
case 'F':
|
|
|
|
return "float[]";
|
|
|
|
case 'I':
|
|
|
|
return "int[]";
|
|
|
|
case 'J':
|
|
|
|
return "long[]";
|
|
|
|
case 'S':
|
|
|
|
return "short[]";
|
|
|
|
case '[':
|
|
|
|
default:
|
|
|
|
throw new MapperException("only supports single dimensional array");
|
|
|
|
}
|
|
|
|
}
|
2017-05-16 16:56:53 -04:00
|
|
|
}
|
|
|
|
|
2017-05-17 11:18:58 -04:00
|
|
|
protected String escapeMapKeyString(final String s) {
|
2017-05-16 16:56:53 -04:00
|
|
|
// todo: escape key string, newlines, double quotes, backslashes...
|
2017-05-17 11:18:58 -04:00
|
|
|
// actually it seems like those wouldn't be valid SQL column names, so we won't bother until we hear different...
|
|
|
|
return '"' + s + '"';
|
2017-05-16 16:56:53 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
// code generation down here
|
|
|
|
protected ResultSetToObject<T> genClass() {
|
|
|
|
final String className = "CompilingMapper";
|
|
|
|
final String tType = typeFromName(_returnTypeClass);
|
|
|
|
final String header =
|
|
|
|
"import static com.moparisthebest.jdbc.util.ResultSetUtil.*;\n\n" +
|
|
|
|
"public final class " + className +
|
|
|
|
" implements com.moparisthebest.jdbc.CompilingRowToObjectMapper.ResultSetToObject<" + tType + "> {\n" +
|
|
|
|
" public " + tType + " toObject(final java.sql.ResultSet rs, final java.util.Calendar cal) throws java.sql.SQLException {\n";
|
|
|
|
final String footer = " }\n" +
|
|
|
|
"}\n";
|
|
|
|
|
|
|
|
final StringBuilder java = new StringBuilder(header);
|
|
|
|
//java.append("return null;\n");
|
|
|
|
gen(java, tType);
|
|
|
|
java.append(footer);
|
|
|
|
//System.out.println(java);
|
|
|
|
return compiler.compile(className, java);
|
|
|
|
}
|
|
|
|
|
|
|
|
protected void gen(final StringBuilder java, final String tType) {
|
|
|
|
|
2017-05-17 13:07:08 -04:00
|
|
|
lazyLoadConstructor();
|
|
|
|
|
2017-05-16 16:56:53 -04:00
|
|
|
if (resultSetConstructor) {
|
|
|
|
java.append("return new ").append(tType).append("(rs);\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (returnMap) // we want a map
|
|
|
|
try {
|
|
|
|
// todo: does not call getMapImplementation, I think that's fine
|
2017-05-17 11:18:58 -04:00
|
|
|
java.append("final ").append(tType).append("<String, Object> ret = new ").append(tType).append("<String, Object>();\n");
|
2017-05-16 16:56:53 -04:00
|
|
|
final ResultSetMetaData md = _resultSet.getMetaData();
|
|
|
|
final int columnLength = _columnCount + 1;
|
|
|
|
if (componentType != null && componentType != Object.class) { // we want a specific value type
|
|
|
|
int typeId = _tmf.getTypeId(componentType);
|
|
|
|
for (int x = 1; x < columnLength; ++x) {
|
2017-05-17 11:18:58 -04:00
|
|
|
java.append("ret.put(").append(escapeMapKeyString(md.getColumnName(x).toLowerCase())).append(", ");
|
2017-05-16 16:56:53 -04:00
|
|
|
extractColumnValueString(java, x, typeId);
|
|
|
|
java.append(");\n");
|
|
|
|
}
|
|
|
|
} else // we want a generic object type
|
|
|
|
for (int x = 1; x < columnLength; ++x)
|
2017-05-17 11:18:58 -04:00
|
|
|
java.append("ret.put(").append(escapeMapKeyString(md.getColumnName(x).toLowerCase())).append(", rs.getObject(").append(x).append("));\n");
|
2017-05-16 16:56:53 -04:00
|
|
|
java.append("return ret;\n");
|
|
|
|
return;
|
|
|
|
} catch (Throwable e) {
|
|
|
|
throw new MapperException(e.getClass().getName() + " when trying to create a Map<String, "
|
|
|
|
+ (componentType == null ? "java.lang.Object" : componentType.getName()) + "> from a ResultSet row" +
|
|
|
|
", all columns must be of the map value type", e);
|
|
|
|
}
|
|
|
|
else if (componentType != null) // we want an array
|
|
|
|
try {
|
2017-05-17 11:18:58 -04:00
|
|
|
java.append("final ").append(tType).append(" ret = new ").append(tType.substring(0, tType.length() - 1)).append(_columnCount).append("];\n");
|
2017-05-16 16:56:53 -04:00
|
|
|
final int typeId = _tmf.getTypeId(componentType);
|
|
|
|
for (int x = 0; x < _columnCount; ) {
|
|
|
|
java.append("ret[").append(x).append("] = ");
|
|
|
|
extractColumnValueString(java, ++x, typeId);
|
|
|
|
java.append(";\n");
|
|
|
|
}
|
|
|
|
java.append("return ret;\n");
|
2017-05-17 11:18:58 -04:00
|
|
|
return;
|
2017-05-16 16:56:53 -04:00
|
|
|
} catch (Throwable e) {
|
|
|
|
throw new MapperException(e.getClass().getName() + " when trying to create a "
|
|
|
|
+ componentType.getName() + "[] from a ResultSet row, all columns must be of that type", e);
|
|
|
|
}
|
|
|
|
|
|
|
|
// if the ResultSet only contains a single column we may be able to map directly
|
|
|
|
// to the return type -- if so we don't need to build any structures to support
|
|
|
|
// mapping
|
|
|
|
if (_columnCount == 1) {
|
|
|
|
|
|
|
|
final int typeId = _tmf.getTypeId(_returnTypeClass);
|
|
|
|
|
|
|
|
try {
|
|
|
|
if (typeId != TypeMappingsFactory.TYPE_UNKNOWN) {
|
|
|
|
java.append("return ");
|
|
|
|
extractColumnValueString(java, 1, typeId);
|
|
|
|
java.append(";\n");
|
|
|
|
return;
|
|
|
|
} else {
|
|
|
|
// we still might want a single value (i.e. java.util.Date)
|
|
|
|
/*
|
|
|
|
Object val = extractColumnValue(1, typeId);
|
|
|
|
if (_returnTypeClass.isAssignableFrom(val.getClass())) {
|
|
|
|
return _returnTypeClass.cast(val);
|
|
|
|
}
|
|
|
|
*/
|
|
|
|
// we could actually pull from first row like above and test it first and fail now, but maybe just failing during compilation is enough?
|
|
|
|
java.append("return (").append(tType).append(") ");
|
|
|
|
extractColumnValueString(java, 1, typeId);
|
|
|
|
java.append(";\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
} catch (Exception e) {
|
|
|
|
throw new MapperException(e.getMessage(), e);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (_fields == null) {
|
|
|
|
try {
|
|
|
|
super.getFieldMappings();
|
|
|
|
} catch (SQLException e) {
|
|
|
|
throw new MapperException(e.getMessage(), e);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
java.append("final ").append(tType).append(" ret = new ").append(tType).append("();\n");
|
|
|
|
|
|
|
|
for (int i = 1; i < _fields.length; i++) {
|
|
|
|
AccessibleObject f = _fields[i];
|
|
|
|
|
|
|
|
//_args[0] = extractColumnValue(i, _fieldTypes[i]);
|
|
|
|
//System.out.printf("field: '%s' obj: '%s' fieldType: '%s'\n", _fields[i], _args[0], _fieldTypes[i]);
|
|
|
|
// custom hacked-in support for enums, can do better when we scrap org.apache.beehive.controls.system.jdbc.TypeMappingsFactory
|
|
|
|
if (_fieldTypes[i] == 0) {
|
|
|
|
final Class<?> fieldType = f instanceof Field ? ((Field) f).getType() : ((Method) f).getParameterTypes()[0];
|
|
|
|
if (Enum.class.isAssignableFrom(fieldType)) {
|
|
|
|
_args[0] = Enum.valueOf((Class<? extends Enum>) fieldType, (String) _args[0]);
|
|
|
|
if (f instanceof Field) {
|
|
|
|
// if f not accessible (but super.getFieldMappings() sets it), throw exception during compilation is fine
|
|
|
|
java.append("ret.").append(((Field) f).getName()).append(" = ").append(typeFromName(fieldType)).append(".valueOf(");
|
|
|
|
extractColumnValueString(java, i, _fieldTypes[i]);
|
|
|
|
java.append(");\n");
|
|
|
|
} else {
|
|
|
|
java.append("ret.").append(((Method) f).getName()).append("(").append(typeFromName(fieldType)).append(".valueOf(");
|
|
|
|
extractColumnValueString(java, i, _fieldTypes[i]);
|
|
|
|
java.append("));\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (f instanceof Field) {
|
|
|
|
// if f not accessible (but super.getFieldMappings() sets it), throw exception during compilation is fine
|
|
|
|
java.append("ret.").append(((Field) f).getName()).append(" = ");
|
|
|
|
extractColumnValueString(java, i, _fieldTypes[i]);
|
|
|
|
java.append(";\n");
|
|
|
|
} else {
|
|
|
|
java.append("ret.").append(((Method) f).getName()).append("(");
|
|
|
|
extractColumnValueString(java, i, _fieldTypes[i]);
|
|
|
|
java.append(");\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// if this resultObject is Finishable, call finish()
|
|
|
|
if (Finishable.class.isAssignableFrom(_returnTypeClass))
|
|
|
|
java.append("ret.finish(rs);\n");
|
|
|
|
java.append("return ret;\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Extract a column value from the ResultSet and return it as resultType.
|
|
|
|
*
|
|
|
|
* @param index The column index of the value to extract from the ResultSet.
|
|
|
|
* @param resultType The return type. Defined in TypeMappingsFactory.
|
|
|
|
* @return The extracted value
|
|
|
|
* @throws java.sql.SQLException on error.
|
|
|
|
*/
|
|
|
|
protected void extractColumnValueString(final StringBuilder java, final int index, final int resultType) {
|
|
|
|
switch (resultType) {
|
|
|
|
case TypeMappingsFactory.TYPE_INT:
|
|
|
|
java.append("rs.getInt(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_LONG:
|
|
|
|
java.append("rs.getLong(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_FLOAT:
|
|
|
|
java.append("rs.getFloat(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_DOUBLE:
|
|
|
|
java.append("rs.getDouble(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BYTE:
|
|
|
|
java.append("rs.getByte(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_SHORT:
|
|
|
|
java.append("rs.getInt(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BOOLEAN:
|
2017-05-17 10:15:27 -04:00
|
|
|
java.append("getBooleanYN(rs, ").append(index).append(")");
|
2017-05-16 16:56:53 -04:00
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_INT_OBJ:
|
|
|
|
java.append("getObjectInt(rs, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_LONG_OBJ:
|
|
|
|
java.append("getObjectLong(rs, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_FLOAT_OBJ:
|
|
|
|
java.append("getObjectFloat(rs, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_DOUBLE_OBJ:
|
|
|
|
java.append("getObjectDouble(rs, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BYTE_OBJ:
|
|
|
|
java.append("getObjectByte(rs, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_SHORT_OBJ:
|
|
|
|
java.append("getObjectShort(rs, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BOOLEAN_OBJ:
|
2017-05-17 10:15:27 -04:00
|
|
|
java.append("getObjectBooleanYN(rs, ").append(index).append(")");
|
2017-05-16 16:56:53 -04:00
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_STRING:
|
|
|
|
case TypeMappingsFactory.TYPE_XMLBEAN_ENUM:
|
|
|
|
java.append("rs.getString(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BIG_DECIMAL:
|
|
|
|
java.append("rs.getBigDecimal(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BYTES:
|
|
|
|
java.append("rs.getBytes(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_TIMESTAMP:
|
|
|
|
java.append("getTimestamp(rs, cal, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_TIME:
|
|
|
|
java.append("getTime(rs, cal, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_SQLDATE:
|
|
|
|
java.append("getSqlDate(rs, cal, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_DATE:
|
|
|
|
java.append("getUtilDate(rs, cal, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_CALENDAR:
|
|
|
|
java.append("getCalendar(rs, cal, ").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_REF:
|
|
|
|
java.append("rs.getRef(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_BLOB:
|
|
|
|
java.append("rs.getBlob(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_CLOB:
|
|
|
|
java.append("rs.getClob(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_ARRAY:
|
|
|
|
java.append("rs.getArray(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
case TypeMappingsFactory.TYPE_READER:
|
|
|
|
case TypeMappingsFactory.TYPE_STREAM:
|
|
|
|
throw new MapperException("streaming return types are not supported by the JdbcControl; use ResultSet instead");
|
|
|
|
case TypeMappingsFactory.TYPE_STRUCT:
|
|
|
|
case TypeMappingsFactory.TYPE_UNKNOWN:
|
|
|
|
// JAVA_TYPE (could be any), or REF
|
|
|
|
java.append("rs.getObject(").append(index).append(")");
|
|
|
|
return;
|
|
|
|
default:
|
|
|
|
throw new MapperException("internal error: unknown type ID: " + Integer.toString(resultType));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|