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/*
* 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.sql;
import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Array;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Ref;
import java.sql.SQLException;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.Map;
import org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration;
import org.apache.openjpa.jdbc.kernel.JDBCStore;
import org.apache.openjpa.jdbc.meta.ClassMapping;
import org.apache.openjpa.jdbc.meta.FieldMapping;
import org.apache.openjpa.jdbc.meta.JavaSQLTypes;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.lib.util.Closeable;
/**
* A result from the execution of a query or stored procedure. This
* interface is aligned closely with the {@link java.sql.ResultSet}, so you
* can expect like-named methods to have similar semantics. However, the
* interface has been distilled and simplified, so a result object could
* easily mask information sources other than a result set.
* For more flexible customization of data loading, see the
* {@link org.apache.openjpa.kernel.PCResultObjectProvider}.
*
* @author Abe White
* @see ResultSetResult
*/
public interface Result
extends Closeable {
/**
* The eager result for the given key, or null if none.
*/
public Object getEager(FieldMapping key);
/**
* The eager result for the given key, or null if none.
*/
public void putEager(FieldMapping key, Object res);
/**
* Return a new joins instance to use for traversing to related data.
*/
public Joins newJoins();
/**
* Free the resources used by this result; do not
* close the SQL connection.
*/
public void close();
/**
* Set to true if row locking has been issued for the row.
*/
public void setLocking(boolean locking);
/**
* If true, then any results loaded from this Result
* will be locked in the database.
*/
public boolean isLocking();
/**
* Return true if the result supports random access.
*/
public boolean supportsRandomAccess()
throws SQLException;
/**
* Move to the given 0-based row in the result, or
* return false if the row does not exist. This method will only be
* called if the result supports random access.
*/
public boolean absolute(int row)
throws SQLException;
/**
* Advance to the next row, or return false if there are no more rows
* in the result.
*/
public boolean next()
throws SQLException;
/**
* Push back the last result. In other words, just ignore the next call
* to {@link #next}. After the first time this method is called,
* additional calls before a call to {@link #next} or {@link #absolute}
* should have no further affect.
*/
public void pushBack()
throws SQLException;
/**
* Return the number of rows in this result.
*/
public int size()
throws SQLException;
/**
* Return true if the given id or column is available in the result.
*/
public boolean contains(Object obj)
throws SQLException;
/**
* Return true if all the given ids or columns are available in the result.
*/
public boolean containsAll(Object[] objs)
throws SQLException;
/**
* Return true if the given column is available in the result.
*/
public boolean contains(Column col, Joins joins)
throws SQLException;
/**
* Return true if all the given columns are available in the result.
*/
public boolean containsAll(Column[] cols, Joins joins)
throws SQLException;
/**
* If this is the result of a UNION used to select a hierarchy of
* mappings, the base mapping represented by the current row.
* This information is not available after getting any eager results
* from the row.
*/
public ClassMapping getBaseMapping();
/**
* If this is the result of a UNION used to select a hierarchy of
* mappings, the base mapping represented by the current row.
* This information is not available after getting any eager results
* from the row.
*/
public void setBaseMapping(ClassMapping mapping);
/**
* If this is the result used to select a toMany relationship,
* the mappedByFieldMapping is field mapping representing
* the inverse relationship. This is to avoid unneeded
* extra sql to retrieve the eager inverse field.
*/
public FieldMapping getMappedByFieldMapping();
/**
* If this is the result used to select a toMany relationship,
* the mappedByFieldMapping is field mapping representing
* the inverse relationship. This is to avoid unneeded
* extra sql to retrieve the eager inverse field.
*/
public void setMappedByFieldMapping(FieldMapping fieldMapping);
/**
* If this is the result used to select a toMany relationship,
* the mappedByValue is value of the owner of the toMany relationship.
* This is to avoid unneeded extra sql to retrieve the eager inverse field.
*/
public Object getMappedByValue();
/**
* If this is the result used to select a toMany relationship,
* the mappedByValue is value of the owner of the toMany relationship.
* This is to avoid unneeded extra sql to retrieve the eager inverse field.
*/
public void setMappedByValue(Object mappedByValue);
/**
* The index of the select within the UNION that the current row
* corresponds to, or 0.
*/
public int indexOf();
/**
* Load a pc object using the given store manager.
*/
public Object load(ClassMapping mapping, JDBCStore store,
JDBCFetchConfiguration fetch)
throws SQLException;
/**
* Load a pc object using the given store manager.
*/
public Object load(ClassMapping mapping, JDBCStore store,
JDBCFetchConfiguration fetch, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Array getArray(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public InputStream getAsciiStream(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public BigDecimal getBigDecimal(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public BigInteger getBigInteger(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public InputStream getBinaryStream(Object obj)
throws SQLException;
public InputStream getLOBStream(JDBCStore store, Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Blob getBlob(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public boolean getBoolean(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public byte getByte(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public byte[] getBytes(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public Calendar getCalendar(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public char getChar(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Reader getCharacterStream(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Clob getClob(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public Date getDate(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public java.sql.Date getDate(Object obj, Calendar cal)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public double getDouble(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public float getFloat(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public int getInt(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public Locale getLocale(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public long getLong(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public Number getNumber(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*
* @param obj the column or id whose data to fetch
* @param metaType the type code from
* {@link org.apache.openjpa.meta.JavaTypes} or {@link JavaSQLTypes} for the
* type of the data; if obj is a column, you may specify -1
* to use the column's recorded java type
* @param arg some JDBC data access methods use an argument, such
* as a {@link Calendar} or {@link Map}
*/
public Object getObject(Object obj, int metaType, Object arg)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Object getSQLObject(Object obj, Map map)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Ref getRef(Object obj, Map map)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public short getShort(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id.
*/
public String getString(Object obj)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Time getTime(Object obj, Calendar cal)
throws SQLException;
/**
* Return the value stored in the given column or id; may not be supported
* by results that are not backed by a SQL result set.
*/
public Timestamp getTimestamp(Object obj, Calendar cal)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Array getArray(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public InputStream getAsciiStream(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public BigDecimal getBigDecimal(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public BigInteger getBigInteger(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public InputStream getBinaryStream(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Blob getBlob(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public boolean getBoolean(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public byte getByte(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public byte[] getBytes(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public Calendar getCalendar(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public char getChar(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Reader getCharacterStream(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Clob getClob(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public Date getDate(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public java.sql.Date getDate(Column col, Calendar cal, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public double getDouble(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public float getFloat(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public int getInt(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public Locale getLocale(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public long getLong(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public Number getNumber(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*
* @param col the column whose data to fetch
* @param arg some JDBC data access methods use an argument, such
* as a {@link Calendar} or {@link Map}
*/
public Object getObject(Column col, Object arg, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Object getSQLObject(Column col, Map map, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Ref getRef(Column col, Map map, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public short getShort(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column.
*/
public String getString(Column col, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Time getTime(Column col, Calendar cal, Joins joins)
throws SQLException;
/**
* Return the value stored in the given column; may not be supported
* by results that are not backed by a SQL result set.
*/
public Timestamp getTimestamp(Column col, Calendar cal, Joins joins)
throws SQLException;
/**
* Return true if the last value fetched was null.
*/
public boolean wasNull()
throws SQLException;
/**
* Informs this receiver about the application element for which a
* subsequent data request will be made.
*/
public void startDataRequest(Object mapping);
/**
* Ends a data request. Must be called in conjunction with
* {@link #startDataRequest}. The calls can be nested as follws
*
