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Java > Open Source Codes > org > objectstyle > cayenne > project > validator > DbAttributeValidator


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
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6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
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24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
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56 package org.objectstyle.cayenne.project.validator;
57
58 import org.objectstyle.cayenne.dba.TypesMapping;
59 import org.objectstyle.cayenne.map.DbAttribute;
60 import org.objectstyle.cayenne.map.DerivedDbAttribute;
61 import org.objectstyle.cayenne.project.ProjectPath;
62 import org.objectstyle.cayenne.util.Util;
63
64 /**
65  * @author Andrei Adamchik
66  */
67 public class DbAttributeValidator extends TreeNodeValidator {
68
69     /**
70      * Constructor for DbAttributeValidator.
71      */
72     public DbAttributeValidator() {
73         super();
74     }
75
76     public void validateObject(ProjectPath path, Validator validator) {
77         DbAttribute attribute = (DbAttribute) path.getObject();
78         // Must have name
79 if (Util.isEmptyString(attribute.getName())) {
80             validator.registerError("Unnamed DbAttribute.", path);
81         }
82         else {
83             MappingNamesHelper helper = MappingNamesHelper.getInstance();
84             String JavaDoc invalidChars = helper.invalidCharsInDbPathComponent(attribute
85                     .getName());
86             
87             if (invalidChars != null) {
88                 validator.registerWarning("DbAttribute name contains invalid characters: "
89                         + invalidChars, path);
90             }
91         }
92
93         // all attributes must have type
94 if (attribute.getType() == TypesMapping.NOT_DEFINED) {
95             validator.registerWarning("DbAttribute has no type.", path);
96         }
97
98         if (attribute instanceof DerivedDbAttribute) {
99             DerivedDbAttribute derived = (DerivedDbAttribute) attribute;
100             int paramCount = derived.getParams().size();
101
102             String JavaDoc spec = derived.getExpressionSpec();
103             int paramsExpected = 0;
104             if (spec != null) {
105                 // count tokens
106 int ind = -DerivedDbAttribute.ATTRIBUTE_TOKEN.length();
107                 while ((ind = spec.indexOf(DerivedDbAttribute.ATTRIBUTE_TOKEN, ind
108                         + DerivedDbAttribute.ATTRIBUTE_TOKEN.length())) >= 0) {
109                     paramsExpected++;
110                 }
111             }
112
113             if (paramsExpected != paramCount) {
114                 validator.registerWarning("Derived Attribute's \""
115                         + attribute.getName()
116                         + "\" parameter mismatch.", path);
117             }
118         }
119         // VARCHAR and CHAR attributes must have max length
120 else if (attribute.getMaxLength() < 0
121                 && (attribute.getType() == java.sql.Types.VARCHAR || attribute.getType() == java.sql.Types.CHAR)) {
122
123             validator.registerWarning(
124                     "Character DbAttribute doesn't have max length.",
125                     path);
126         }
127     }
128 }
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