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Code Issues Releases Wiki Activity

Handle non-public default constructors

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moparisthebest 2014-06-11 09:51:08 -04:00
parent ec65aae369
commit f7b1a52ba1
1 changed files with 21 additions and 10 deletions
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29
beehive-jdbc-mapper/src/main/java/com/moparisthebest/jdbc/RowToObjectMapper.java
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@ -53,7 +53,8 @@ public class RowToObjectMapper<T> extends RowMapper {
public static final int TYPE_BOOLEAN_OBJ = _tmf.getTypeId(Boolean.class);//TypeMappingsFactory.TYPE_BOOLEAN_OBJ; // not public? public static final int TYPE_BOOLEAN_OBJ = _tmf.getTypeId(Boolean.class);//TypeMappingsFactory.TYPE_BOOLEAN_OBJ; // not public?
protected final int _columnCount; protected final int _columnCount;
protected final Constructor<T> resultSetConstructor; protected final boolean resultSetConstructor;
protected final Constructor<T> constructor;
protected final Class<? extends T> _returnTypeClass; // over-ride non-generic version of this in super class protected final Class<? extends T> _returnTypeClass; // over-ride non-generic version of this in super class
// only non-null when _returnTypeClass is an array, or a map // only non-null when _returnTypeClass is an array, or a map
@ -99,15 +100,25 @@ public class RowToObjectMapper<T> extends RowMapper {
_fields = null; _fields = null;
// detect if returnTypeClass has a constructor that takes a ResultSet, if so, our job couldn't be easier... // detect if returnTypeClass has a constructor that takes a ResultSet, if so, our job couldn't be easier...
Constructor<T> resultSetConstructor = null; boolean resultSetConstructor = false;
Constructor<T> constructor = null;
try { try {
resultSetConstructor = returnTypeClass.getConstructor(ResultSet.class); constructor = returnTypeClass.getConstructor(ResultSet.class);
if (!resultSetConstructor.isAccessible()) if (!constructor.isAccessible())
resultSetConstructor.setAccessible(true); constructor.setAccessible(true);
resultSetConstructor = true;
} catch (Throwable e) { } catch (Throwable e) {
// do nothing, no such constructor // if no resultSetConstructor find the constructor
try {
constructor = returnTypeClass.getDeclaredConstructor();
if (!constructor.isAccessible())
constructor.setAccessible(true);
} catch (Throwable e1) {
throw new MapperException("Exception when trying to get constructor for : "+returnTypeClass.getName() + " Must have default no-arg constructor or one that takes a single ResultSet.", e1);
}
} }
this.resultSetConstructor = resultSetConstructor; this.resultSetConstructor = resultSetConstructor;
this.constructor = constructor;
try { try {
_columnCount = resultSet.getMetaData().getColumnCount(); _columnCount = resultSet.getMetaData().getColumnCount();
@ -133,9 +144,9 @@ public class RowToObjectMapper<T> extends RowMapper {
*/ */
public T mapRowToReturnType() { public T mapRowToReturnType() {
if (resultSetConstructor != null) if (resultSetConstructor)
try { try {
return resultSetConstructor.newInstance(_resultSet); return constructor.newInstance(_resultSet);
} catch (Throwable e) { } catch (Throwable e) {
throw new MapperException(e.getClass().getName() + " when trying to create instance of : " throw new MapperException(e.getClass().getName() + " when trying to create instance of : "
+ _returnTypeClass.getName() + " sending in a ResultSet object as a parameter", e); + _returnTypeClass.getName() + " sending in a ResultSet object as a parameter", e);
@ -205,7 +216,7 @@ public class RowToObjectMapper<T> extends RowMapper {
} }
try { try {
resultObject = _returnTypeClass.newInstance(); resultObject = constructor.newInstance();
} catch (Throwable e) { } catch (Throwable e) {
throw new MapperException(e.getClass().getName() + " when trying to create instance of : " throw new MapperException(e.getClass().getName() + " when trying to create instance of : "
+ _returnTypeClass.getName(), e); + _returnTypeClass.getName(), e);