/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.core.types.basic;
import org.teiid.core.types.DataTypeManagerService;
import org.teiid.core.types.Transform;
/**
* This class can be subclassed to do a simple anything-->String by
* just calling toString(). Just extend and implement getSouceType().
*/
public class AnyToStringTransform extends Transform {
private Class<?> sourceType;
public AnyToStringTransform(DataTypeManagerService dataTypeManager, Class<?> sourceType) {
super(dataTypeManager);
this.sourceType = sourceType;
}
/**
* Type of the incoming value.
* @return Source type
*/
public Class<?> getSourceType() {
return sourceType;
}
/**
* Type of the outgoing value.
* @return Target type
*/
public Class<?> getTargetType() {
return String.class;
}
/**
* This method transforms a value of the source type into a value
* of the target type.
* @param value Incoming value - Integer
* @return Outgoing value - String
* @throws Exception if value is an incorrect input type or
* the transformation fails
*/
public Object transformDirect(Object value) throws Exception {
String result = value.toString();
if (result != null && result.length() > DataTypeManagerService.MAX_STRING_LENGTH) {
return result.substring(0, DataTypeManagerService.MAX_STRING_LENGTH);
}
return result;
}
}