/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.amber.type;
import com.caucho.amber.entity.EntityItem;
import com.caucho.amber.manager.AmberConnection;
import com.caucho.amber.manager.AmberPersistenceUnit;
import com.caucho.config.ConfigException;
import com.caucho.java.JavaWriter;
import com.caucho.util.L10N;
import java.io.IOException;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
/**
* The type of a property.
*/
abstract public class AmberType {
private static final L10N L = new L10N(AmberType.class);
/**
* Returns the type name.
*/
abstract public String getName();
/**
* Returns true for a boolean type.
*/
public boolean isBoolean()
{
return false;
}
/**
* Returns true for a numeric type.
*/
public boolean isNumeric()
{
return false;
}
/**
* Returns the java type.
*/
public String getJavaTypeName()
{
return getName();
}
/**
* Returns the number of columns the type takes up.
*/
public int getColumnCount()
{
return 1;
}
/**
* Initialize the type.
*/
public void init()
throws ConfigException
{
}
/**
* Returns the type as a foreign key.
*/
public AmberType getForeignType()
{
return this;
}
/**
* Returns the java class of the type as a foreign key.
*/
public String getForeignTypeName()
{
return getForeignType().getJavaTypeName();
}
/**
* Returns true if the value is assignable to the Java type.
*/
public boolean isAssignableTo(Class javaType)
{
return true;
}
/**
* Generates the type for the table.
*/
public String generateCreateColumnSQL(AmberPersistenceUnit manager, int length, int precision, int scale)
{
if (length == 0)
length = 255;
return manager.getCreateColumnSQL(Types.VARCHAR, length, precision, scale);
}
/**
* Generates a string to load the type as a property.
*/
public int generateLoad(JavaWriter out, String rs,
String indexVar, int index)
throws IOException
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Generates a string to load the type as a property.
*/
public int generateLoadNative(JavaWriter out, int index)
throws IOException
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Generates a string to load the type as a property.
*/
public int generateLoad(JavaWriter out, String rs,
String indexVar, int index,
Class targetType)
throws IOException
{
String i = indexVar + " + " + index;
if ("java.lang.Byte".equals(targetType.getName()))
out.print("new Byte((byte) " + rs + ".getInt(" + i + "))");
else if ("java.lang.Short".equals(targetType.getName()))
out.print("new Short((short) " + rs + ".getInt(" + i + "))");
else if ("java.lang.Integer".equals(targetType.getName())) {
// ejb/0629
out.print("new Integer(" + rs + ".getInt(" + i + "))");
}
else if ("java.lang.Long".equals(targetType.getName()))
out.print("new Long(" + rs + ".getLong(" + i + "))");
else if ("java.lang.Float".equals(targetType.getName()))
out.print("new Float((float) " + rs + ".getDouble(" + i + "))");
else if ("java.lang.Double".equals(targetType.getName()))
out.print("new Double(" + rs + ".getDouble(" + i + "))");
else if ("java.lang.String".equals(targetType.getName()))
out.print(rs + ".getString(" + i + ")");
else {
out.print("(" + targetType.getName() + ") ");
out.print(rs + ".getObject(" + i + ")");
}
return index + 1;
}
/**
* Generates a string to load the type as a property.
*/
public int generateLoadForeign(JavaWriter out, String rs,
String indexVar, int index)
throws IOException
{
return getForeignType().generateLoad(out, rs, indexVar, index);
}
/**
* Generates a string to set the type as a property.
*/
public void generateSet(JavaWriter out, String pstmt,
String index, String value)
throws IOException
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Generates a string to set the type as a property.
*/
public void generateSetVersion(JavaWriter out,
String pstmt,
String index,
String value)
throws IOException
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Generates the increment version.
*/
public String generateIncrementVersion(String value)
throws IOException
{
return value + " + 1";
}
/**
* Generates a string to set the property.
*/
public void generateSetNull(JavaWriter out, String pstmt, String index)
throws IOException
{
generateSet(out, pstmt, index, null);
}
/**
* Sets the value.
*/
public void setParameter(PreparedStatement pstmt, int index, Object value)
throws SQLException
{
pstmt.setObject(index, value);
}
/**
* Gets the value.
*/
public Object getObject(ResultSet rs, int index)
throws SQLException
{
return rs.getObject(index);
}
/**
* Finds the object
*/
public EntityItem findItem(AmberConnection aConn, ResultSet rs, int index)
throws SQLException
{
throw new UnsupportedOperationException(getClass().getName());
}
/**
* Gets the value.
*/
public Object getObject(AmberConnection aConn, ResultSet rs, int index)
throws SQLException
{
return getObject(rs, index);
}
/**
* Converts to an object.
*/
public String toObject(String value)
{
return value;
}
/**
* Converts from an object.
*/
public String fromObject(String value)
{
return generateCastFromObject(value);
}
/**
* Converts to an object.
*/
public Object toObject(long value)
{
return new Long(value);
}
/**
* Converts the value.
*/
public String generateCastFromObject(String value)
{
return "((" + getName() + ") " + value + ")";
}
/**
* Returns a boolean equality.
*/
public String generateEquals(String a, String b)
{
return a + ".equals(" + b + ")";
}
/**
* Returns a test for null.
*/
public String generateIsNull(String value)
{
return "(" + value + " == " + generateNull() + ")";
}
/**
* Returns a test for null.
*/
public String generateNull()
{
return "null";
}
/**
* Returns true for an auto-increment type.
*/
public boolean isAutoIncrement()
{
return false;
}
}