01: /*
02:
03: Derby - Class org.apache.derby.iapi.types.VariableSizeDataValue
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (the "License"); you may not use this file except in compliance with
10: the License. You may obtain a copy of the License at
11:
12: http://www.apache.org/licenses/LICENSE-2.0
13:
14: Unless required by applicable law or agreed to in writing, software
15: distributed under the License is distributed on an "AS IS" BASIS,
16: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: See the License for the specific language governing permissions and
18: limitations under the License.
19:
20: */
21:
22: package org.apache.derby.iapi.types;
23:
24: import org.apache.derby.iapi.error.StandardException;
25:
26: /**
27: * The VariableSizeDataValue interface corresponds to
28: * Datatypes that have adjustable width.
29: *
30: * The following methods are defined herein:
31: * setWidth()
32: *
33: * @author jamie
34: */
35: public interface VariableSizeDataValue {
36:
37: public static int IGNORE_PRECISION = -1;
38:
39: /*
40: * Set the width and scale (if relevant). Sort of a poor
41: * man's normalize. Used when we need to normalize a datatype
42: * but we don't want to use a NormalizeResultSet (e.g.
43: * for an operator that can change the width/scale of a
44: * datatype, namely CastNode).
45: *
46: * @param desiredWidth width
47: * @param desiredScale scale, if relevant (ignored for strings)
48: * @param errorOnTrunc throw an error on truncation of value
49: *
50: * @exception StandardException Thrown on error
51: */
52: public void setWidth(int desiredWidth, int desiredScale,
53: boolean errorOnTrunc) throws StandardException;
54: }
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