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1 package org.hibernate.hql.classic;
3
4 import org.hibernate.QueryException;
5 import org.hibernate.hql.CollectionProperties;
6 import org.hibernate.util.StringHelper;
7
8 import java.util.HashSet  ;
9 import java.util.Map ;
10 import java.util.Set ;
11
12
15 public class PreprocessingParser implements Parser {
16
17 private static final Set HQL_OPERATORS;
18
19 static {
20 HQL_OPERATORS = new HashSet ();
21 HQL_OPERATORS.add( "<=" );
22 HQL_OPERATORS.add( ">=" );
23 HQL_OPERATORS.add( "=>" );
24 HQL_OPERATORS.add( "=<" );
25 HQL_OPERATORS.add( "!=" );
26 HQL_OPERATORS.add( "<>" );
27 HQL_OPERATORS.add( "!#" );
28 HQL_OPERATORS.add( "!~" );
29 HQL_OPERATORS.add( "!<" );
30 HQL_OPERATORS.add( "!>" );
31 HQL_OPERATORS.add( "is not" );
32 HQL_OPERATORS.add( "not like" );
33 HQL_OPERATORS.add( "not in" );
34 HQL_OPERATORS.add( "not between" );
35 HQL_OPERATORS.add( "not exists" );
36 }
37
38 private Map replacements;
39 private boolean quoted;
40 private StringBuffer quotedString;
41 private ClauseParser parser = new ClauseParser();
42 private String lastToken;
43 private String currentCollectionProp;
44
45 public PreprocessingParser(Map replacements) {
46 this.replacements = replacements;
47 }
48
49 public void token(String token, QueryTranslatorImpl q) throws QueryException {
50
51 if ( quoted ) {
53 quotedString.append( token );
54 }
55 if ( "'".equals( token ) ) {
56 if ( quoted ) {
57 token = quotedString.toString();
58 }
59 else {
60 quotedString = new StringBuffer ( 20 ).append( token );
61 }
62 quoted = !quoted;
63 }
64 if ( quoted ) return;
65
66 if ( ParserHelper.isWhitespace( token ) ) return;
68
69 String substoken = ( String ) replacements.get( token );
71 token = ( substoken == null ) ? token : substoken;
72
73 if ( currentCollectionProp != null ) {
75 if ( "(".equals( token ) ) {
76 return;
77 }
78 else if ( ")".equals( token ) ) {
79 currentCollectionProp = null;
80 return;
81 }
82 else {
83 token = StringHelper.qualify( token, currentCollectionProp );
84 }
85 }
86 else {
87 String prop = CollectionProperties.getNormalizedPropertyName( token.toLowerCase() );
88 if ( prop != null ) {
89 currentCollectionProp = prop;
90 return;
91 }
92 }
93
94
95 if ( lastToken == null ) {
97 lastToken = token;
98 }
99 else {
100 String doubleToken = ( token.length() > 1 ) ?
101 lastToken + ' ' + token :
102 lastToken + token;
103 if ( HQL_OPERATORS.contains( doubleToken.toLowerCase() ) ) {
104 parser.token( doubleToken, q );
105 lastToken = null;
106 }
107 else {
108 parser.token( lastToken, q );
109 lastToken = token;
110 }
111 }
112
113 }
114
115 public void start(QueryTranslatorImpl q) throws QueryException {
116 quoted = false;
117 parser.start( q );
118 }
119
120 public void end(QueryTranslatorImpl q) throws QueryException {
121 if ( lastToken != null ) parser.token( lastToken, q );
122 parser.end( q );
123 lastToken = null;
124 currentCollectionProp = null;
125 }
126
127 }
128
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130
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