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org.apache.openjpa.jdbc.meta.ValueMappingImpl Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.openjpa.jdbc.meta;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import org.apache.openjpa.jdbc.identifier.DBIdentifier;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.ColumnIO;
import org.apache.openjpa.jdbc.schema.ForeignKey;
import org.apache.openjpa.jdbc.schema.Index;
import org.apache.openjpa.jdbc.schema.Schemas;
import org.apache.openjpa.jdbc.schema.Table;
import org.apache.openjpa.jdbc.schema.Unique;
import org.apache.openjpa.jdbc.sql.Row;
import org.apache.openjpa.jdbc.sql.Select;
import org.apache.openjpa.kernel.OpenJPAStateManager;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.meta.JavaTypes;
import org.apache.openjpa.meta.ValueMetaData;
import org.apache.openjpa.meta.ValueMetaDataImpl;
import org.apache.openjpa.util.InternalException;
import org.apache.openjpa.util.MetaDataException;
/**
* Standalone {@link ValueMapping} implementation.
*
* @author Abe White
* @since 0.4.0
*/
public class ValueMappingImpl
extends ValueMetaDataImpl
implements ValueMapping {
private static final long serialVersionUID = 6440545965133775709L;
private static final Localizer _loc = Localizer.forPackage
(ValueMappingImpl.class);
private ValueMappingInfo _info;
private ValueHandler _handler = null;
private ClassMapping[] _typeArr = null;
private Column[] _cols = Schemas.EMPTY_COLUMNS;
private ColumnIO _io = null;
private ForeignKey _fk = null;
private Map _targetFKs = null;
private Index _idx = null;
private Unique _unq = null;
private int _join = JOIN_FORWARD;
private boolean _criteria = false;
private int _poly = POLY_TRUE;
/**
* Constructor. Supply owning mapping.
*/
public ValueMappingImpl(FieldMapping owner) {
super(owner);
_info = owner.getMappingRepository().newMappingInfo(this);
_info.setUseClassCriteria(owner.getMappingRepository().
getMappingDefaults().useClassCriteria());
}
/**
* Constructor for deserialization.
*/
protected ValueMappingImpl() {
super();
}
@Override
public ValueMappingInfo getValueInfo() {
return _info;
}
@Override
public ValueHandler getHandler() {
return _handler;
}
@Override
public void setHandler(ValueHandler handler) {
_handler = handler;
}
@Override
public MappingRepository getMappingRepository() {
return (MappingRepository) getRepository();
}
@Override
public FieldMapping getFieldMapping() {
return (FieldMapping) getFieldMetaData();
}
@Override
public ClassMapping getTypeMapping() {
return (ClassMapping) getTypeMetaData();
}
@Override
public ClassMapping getDeclaredTypeMapping() {
return (ClassMapping) getDeclaredTypeMetaData();
}
@Override
public ClassMapping getEmbeddedMapping() {
return (ClassMapping) getEmbeddedMetaData();
}
@Override
public FieldMapping getValueMappedByMapping() {
return (FieldMapping) getValueMappedByMetaData();
}
@Override
public Column[] getColumns() {
if (_cols.length != 0)
return _cols;
if (_fk != null)
return _fk.getColumns();
if (getValueMappedBy() != null)
return getValueMappedByMapping().getColumns();
return _cols;
}
@Override
public void setColumns(Column[] cols) {
if (cols == null)
cols = Schemas.EMPTY_COLUMNS;
_cols = cols;
}
@Override
public ColumnIO getColumnIO() {
if (_cols.length == 0 && _fk == null && getValueMappedBy() != null)
return getValueMappedByMapping().getColumnIO();
return (_io == null) ? ColumnIO.UNRESTRICTED : _io;
}
@Override
public void setColumnIO(ColumnIO io) {
_io = io;
}
@Override
public ForeignKey getForeignKey() {
if (_fk == null && getValueMappedBy() != null)
return getValueMappedByMapping().getForeignKey();
return _fk;
}
@Override
public void setForeignKey(ForeignKey fk) {
_fk = fk;
if (fk == null)
_join = JOIN_FORWARD;
}
public ForeignKey getForeignKey(ClassMapping target, int targetNumber) {
if (_fk == null && getValueMappedBy() != null)
return getValueMappedByMapping().getForeignKey(target);
if (target == null)
return _fk;
ClassMapping embeddedMeta = (ClassMapping)getEmbeddedMetaData();
if (embeddedMeta != null) {
FieldMapping[] fields = embeddedMeta.getFieldMappings();
int j = 0;
for (FieldMapping field : fields) {
ValueMapping val = field.getValueMapping();
if (val.getDeclaredTypeMapping() == target)
if (targetNumber == j)
return val.getForeignKey();
else
j++;
}
}
if (_fk == null && _cols.length == 0)
return null;
// always use least-derived joinable type
for (ClassMapping sup = target; sup != null;
sup = sup.getJoinablePCSuperclassMapping()) {
if (sup == getTypeMetaData())
return _fk;
target = sup;
}
synchronized (this) {
if (_targetFKs != null) {
Object cachedFK = _targetFKs.get(target);
if (cachedFK != null)
return (ForeignKey) cachedFK;
} else
_targetFKs = new HashMap<>();
ForeignKey newfk = (_join == JOIN_FORWARD)
? newForwardForeignKey(target) : newInverseForeignKey(target);
_targetFKs.put(target, newfk);
return newfk;
}
}
@Override
public ForeignKey getForeignKey(ClassMapping target) {
return getForeignKey(target, 0);
}
/**
* Create a forward foreign key to the given target.
*/
private ForeignKey newForwardForeignKey(ClassMapping target) {
Table table;
Column[] cols;
if (_fk == null) {
table = _cols[0].getTable();
cols = _cols;
} else {
table = _fk.getTable();
cols = _fk.getColumns();
}
// gather target cols before adding foreign key to table in case
// there is an error while looking for a target col
Column[] tcols = new Column[cols.length];
for (int i = 0; i < cols.length; i++) {
if (cols[i].getTargetField() != null)
tcols[i] = getEquivalentColumn(cols[i], target,
cols[i].getTargetField());
else if (_fk != null)
tcols[i] = getEquivalentColumn(_fk.getPrimaryKeyColumn
(cols[i]).getIdentifier(), target, true);
else if (!DBIdentifier.isNull(cols[i].getTargetIdentifier()))
tcols[i] = getEquivalentColumn(cols[i].getTargetIdentifier(), target,
true);
else
tcols[i] = getEquivalentColumn(cols[i].getIdentifier(), target,
false);
}
ForeignKey newfk = table.addForeignKey();
newfk.setJoins(cols, tcols);
if (_fk != null) {
cols = _fk.getConstantColumns();
for (Column column : cols) {
newfk.joinConstant(column, _fk.getConstant(column));
}
cols = _fk.getConstantPrimaryKeyColumns();
for (Column col : cols)
newfk.joinConstant(_fk.getPrimaryKeyConstant(col),
getEquivalentColumn(col.getIdentifier(), target, true));
}
return newfk;
}
/**
* Return the given mapping's equivalent to the given column, using the
* target field.
*/
private Column getEquivalentColumn(Column col, ClassMapping target,
String fieldName) {
fieldName = fieldName.substring(fieldName.indexOf('.') + 1);
FieldMapping field = target.getFieldMapping(fieldName);
if (field == null)
throw new MetaDataException(_loc.get("no-equiv-field",
new Object[]{ this, target, fieldName, col }));
Column[] cols = field.getColumns();
if (cols.length != 1)
throw new MetaDataException(_loc.get("bad-equiv-field",
new Object[]{ this, target, fieldName, col }));
return cols[0];
}
/**
* Return the given mapping's equivalent of the given column.
*/
private Column getEquivalentColumn(DBIdentifier colName, ClassMapping target,
boolean explicit) {
// if there was no explicit target, use single pk column
if (!explicit) {
for (ClassMapping cls = target; cls != null;
cls = cls.getJoinablePCSuperclassMapping()) {
if (cls.getTable() != null) {
if (cls.getPrimaryKeyColumns().length == 1)
return cls.getPrimaryKeyColumns()[0];
break;
}
}
}
Column ret;
for (ClassMapping cls = target; cls != null;
cls = cls.getJoinablePCSuperclassMapping()) {
if (cls.getTable() != null) {
ret = cls.getTable().getColumn(colName);
if (ret != null)
return ret;
}
}
throw new MetaDataException(_loc.get("no-equiv-col", this, target,
colName));
}
/**
* Return an inverse foreign key from the given related type to our table.
*/
private ForeignKey newInverseForeignKey(ClassMapping target) {
FieldMapping field = getFieldMapping();
FieldMapping mapped = field.getMappedByMapping();
if (mapped == null)
throw new MetaDataException(_loc.get("cant-inverse", this));
mapped = target.getFieldMapping(mapped.getIndex());
if (mapped == null || mapped.getTypeCode() != JavaTypes.PC)
throw new MetaDataException(_loc.get("no-equiv-mapped-by",
this, target, field.getMappedBy()));
return mapped.getForeignKey();
}
@Override
public int getJoinDirection() {
if (_fk == null && getValueMappedBy() != null)
return getValueMappedByMapping().getJoinDirection();
return _join;
}
@Override
public void setJoinDirection(int direction) {
_join = direction;
}
@Override
public void setForeignKey(Row row, OpenJPAStateManager rel, int targetNumber)
throws SQLException {
if (rel != null) {
row.setForeignKey(getForeignKey((ClassMapping) rel.getMetaData(), targetNumber),
_io, rel);
}
else if (_fk != null)
row.setForeignKey(_fk, _io, null);
else {
for (int i = 0; i < _cols.length; i++) {
if (_io == null || (row.getAction() == Row.ACTION_INSERT
&& _io.isInsertable(i, true))
|| (row.getAction() != Row.ACTION_INSERT
&& _io.isUpdatable(i, true)))
row.setNull(_cols[i]);
}
}
}
@Override
public void setForeignKey(Row row, OpenJPAStateManager rel)
throws SQLException {
setForeignKey(row, rel, 0);
}
@Override
public void whereForeignKey(Row row, OpenJPAStateManager rel)
throws SQLException {
if (rel != null)
row.whereForeignKey(getForeignKey((ClassMapping)
rel.getMetaData()), rel);
else if (_fk != null)
row.whereForeignKey(_fk, null);
else
for (Column col : _cols) {
row.whereNull(col);
}
}
@Override
public ClassMapping[] getIndependentTypeMappings() {
ClassMapping rel = getTypeMapping();
if (rel == null)
return ClassMapping.EMPTY_MAPPINGS;
if (_poly != POLY_TRUE) {
if (!rel.isMapped())
return ClassMapping.EMPTY_MAPPINGS;
if (_typeArr == null)
_typeArr = new ClassMapping[]{ rel };
return _typeArr;
}
return rel.getIndependentAssignableMappings();
}
@Override
public int getSelectSubclasses() {
ClassMapping rel = getTypeMapping();
if (rel == null || !rel.isMapped())
return -1;
switch (_poly) {
case POLY_FALSE:
return (_criteria) ? Select.SUBS_NONE : Select.SUBS_EXACT;
case POLY_TRUE:
ClassMapping[] assign = rel.getIndependentAssignableMappings();
if (assign.length != 1 || assign[0] != rel)
return -1;
// no break
case POLY_JOINABLE:
return (_criteria) ? Select.SUBS_JOINABLE
: Select.SUBS_ANY_JOINABLE;
default:
throw new InternalException();
}
}
@Override
public Unique getValueUnique() {
return _unq;
}
@Override
public void setValueUnique(Unique unq) {
_unq = unq;
}
@Override
public Index getValueIndex() {
return _idx;
}
@Override
public void setValueIndex(Index idx) {
_idx = idx;
}
@Override
public boolean getUseClassCriteria() {
if (_fk == null && getValueMappedBy() != null)
return getValueMappedByMapping().getUseClassCriteria();
return _criteria;
}
@Override
public void setUseClassCriteria(boolean criteria) {
_criteria = criteria;
}
@Override
public int getPolymorphic() {
return _poly;
}
@Override
public void setPolymorphic(int poly) {
_poly = poly;
}
@Override
public void refSchemaComponents() {
for (Column col : _cols) {
col.ref();
}
if (_fk != null) {
_fk.ref();
_fk.refColumns();
}
ClassMapping embed = getEmbeddedMapping();
if (embed != null)
embed.refSchemaComponents();
}
/**
* @deprecated
*/
@Deprecated
@Override
public void mapConstraints(String name, boolean adapt) {
mapConstraints(DBIdentifier.newConstraint(name), adapt);
}
@Override
public void mapConstraints(DBIdentifier name, boolean adapt) {
_unq = _info.getUnique(this, name, adapt);
_idx = _info.getIndex(this, name, adapt);
}
@Override
public void clearMapping() {
_handler = null;
_cols = Schemas.EMPTY_COLUMNS;
_unq = null;
_idx = null;
_fk = null;
_join = JOIN_FORWARD;
_info.clear();
setResolve(MODE_MAPPING | MODE_MAPPING_INIT, false);
}
@Override
public void syncMappingInfo() {
if (getValueMappedBy() != null)
_info.clear();
else {
_info.syncWith(this);
ClassMapping embed = getEmbeddedMapping();
if (embed != null)
embed.syncMappingInfo();
}
}
@Override
public void copy(ValueMetaData vmd) {
super.copy(vmd);
copyMappingInfo((ValueMapping)vmd);
}
@Override
public void copyMappingInfo(ValueMapping vm) {
setValueMappedBy(vm.getValueMappedBy());
setPolymorphic(vm.getPolymorphic());
_info.copy(vm.getValueInfo());
ClassMapping embed = vm.getEmbeddedMapping();
if (embed != null && getEmbeddedMapping() != null) {
FieldMapping[] tmplates = embed.getFieldMappings();
FieldMapping[] fms = getEmbeddedMapping().getFieldMappings();
if (tmplates.length == fms.length)
for (int i = 0; i < fms.length; i++)
fms[i].copyMappingInfo(tmplates[i]);
}
}
@Override
public boolean resolve(int mode) {
int cur = getResolve();
if (super.resolve(mode))
return true;
ClassMapping embed = getEmbeddedMapping();
if (embed != null)
embed.resolve(mode);
if ((mode & MODE_MAPPING) != 0 && (cur & MODE_MAPPING) == 0)
resolveMapping();
if ((mode & MODE_MAPPING_INIT) != 0 && (cur & MODE_MAPPING_INIT) == 0)
initializeMapping();
return false;
}
/**
* Setup mapping. Our handler will already have been set by our owning
* field.
*/
private void resolveMapping() {
// mark mapped columns
Column[] cols;
int insertFlag;
if (_fk != null) {
cols = _fk.getColumns();
insertFlag = Column.FLAG_FK_INSERT;
} else {
cols = getColumns();
insertFlag = Column.FLAG_DIRECT_INSERT;
}
ColumnIO io = getColumnIO();
for (int i = 0; i < cols.length; i++) {
if (io.isInsertable(i, false))
cols[i].setFlag(insertFlag, true);
if (io.isUpdatable(i, false))
cols[i].setFlag(insertFlag, true);
}
}
/**
* Prepare mapping for runtime use.
*/
private void initializeMapping() {
if (_fk == null)
return;
// if our fk cols are direct mapped by other values, make them
// non-nullable
Column[] cols = _fk.getColumns();
for (int i = 0; i < cols.length; i++) {
if (cols[i].getFlag(Column.FLAG_DIRECT_INSERT))
newIO().setNullInsertable(i, false);
if (cols[i].getFlag(Column.FLAG_DIRECT_UPDATE))
newIO().setNullUpdatable(i, false);
}
// if anything maps our constant fk cols, make them read only
int len = cols.length;
cols = _fk.getConstantColumns();
for (int i = 0; i < cols.length; i++) {
if (cols[i].getFlag(Column.FLAG_DIRECT_INSERT)
|| cols[i].getFlag(Column.FLAG_FK_INSERT))
newIO().setInsertable(len + i, false);
if (cols[i].getFlag(Column.FLAG_DIRECT_UPDATE)
|| cols[i].getFlag(Column.FLAG_FK_UPDATE))
newIO().setUpdatable(len + i, false);
}
}
/**
* Return the column I/O information, creating it if necessary.
*/
private ColumnIO newIO() {
if (_io == null)
_io = new ColumnIO();
return _io;
}
}
