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1
5
6 package com.hp.hpl.jena.rdql;
7
8 import java.io.* ;
9 import java.util.HashMap  ;
10 import java.util.Map ;
11
12 import com.hp.hpl.jena.graph.Node;
13 import com.hp.hpl.jena.graph.impl.LiteralLabel;
14 import com.hp.hpl.jena.rdf.model.*;
15 import com.hp.hpl.jena.rdql.parser.*;
16 import com.hp.hpl.jena.shared.PrefixMapping;
17 import com.hp.hpl.jena.vocabulary.XSD;
18
19
23
24 public class QueryPrintUtils
25 {
26 static final String indentPrefix = " " ;
28 public static boolean multiLineExpr = false ;
29 public static boolean printName = true ;
30 static int bNodeCounter = 0 ;
31 static Map bNodeStrings = new HashMap () ;
32
33
34
35 public static void print(PrintWriter pw, Expr expr)
36 {
37 pw.println(expr.asPrefixString());
39 }
40
41 public static String asInfixString1(Expr expr, String opName, String symbol)
42 {
43 StringBuffer sb = new StringBuffer () ;
44 sb.append("(") ;
45 sb.append(symbol) ;
46 sb.append(" ") ;
47 sb.append(expr.asInfixString()) ;
48 sb.append(")");
49 return sb.toString() ;
50 }
51
52 public static String asInfixString2(Expr left, Expr right, String opName, String symbol)
53 {
54 StringBuffer sb = new StringBuffer () ;
55 sb.append("( ") ;
56 sb.append(left.asInfixString()) ;
57 sb.append(" ") ;
58 sb.append( symbol ) ;
59 sb.append(" ") ;
60 sb.append(right.asInfixString()) ;
61 sb.append(" )");
62 return sb.toString() ;
63 }
64
65 public static String asPrefixString(Expr left, Expr right, String opName, String symbol)
66 {
67 StringBuffer sb = new StringBuffer () ;
68
69 sb.append("(") ;
70 sb.append( printName?opName:symbol ) ;
71 sb.append(" ") ;
72 sb.append(left.asPrefixString()) ;
73 if ( right != null )
74 {
75 sb.append(" ") ;
76 sb.append(right.asPrefixString()) ;
77 }
78 sb.append(")");
79 return sb.toString() ;
80 }
81
82 public static void print(PrintWriter pw, Expr left, Expr right, String opName, String symbol, int level)
84 {
85 indent(pw, level) ;
86 pw.println("("+(printName?opName:symbol)) ;
87 left.print(pw, level+1);
88 if ( right != null )
89 right.print(pw, level+1);
90 indent(pw, level) ;
91 pw.println(")") ;
92 }
93
94 public static void indent(PrintWriter pw, int level)
95 {
96 for ( int i = 0 ; i < level ; i++ )
97 pw.print(indentPrefix);
98 }
99
101 public static String stringForObject(Object obj)
102 {
103 if ( obj == null )
104 return "<<null>>" ;
105
106 if ( obj instanceof RDFNode )
107 return stringForRDFNode((RDFNode)obj) ;
108 if ( obj instanceof Node )
109 return stringForNode((Node)obj) ;
110 return obj.toString() ;
111 }
112
113
114 public static String stringForRDFNode(RDFNode obj)
115 {
116 if ( obj == null )
117 return "<<null>>" ;
118
119 if ( obj instanceof Literal )
120 return stringForLiteral((Literal)obj) ;
121
122 if ( obj instanceof Resource )
123 return stringForResource((Resource)obj) ;
124
125 return obj.toString() ;
126 }
127
128 public static String stringForLiteral(Literal literal)
129 {
130 return stringForLiteralLabel(literal.asNode().getLiteral()) ;
131 }
132
133 public static String stringForLiteralLabel(LiteralLabel literal)
134 {
135 String datatype = literal.getDatatypeURI() ;
136 String lang = literal.language() ;
137 String s = literal.getLexicalForm() ;
138
139 if ( datatype != null )
140 {
141 if ( datatype.equals(XSD.integer.getURI()) )
144 {
145 try {
146 new java.math.BigInteger (s) ;
147 return s ;
148 } catch (NumberFormatException nfe) {}
149 }
152
153 if ( datatype.equals(XSD.xdouble.getURI()) )
154 {
155 if ( s.indexOf('.') >= 0 ||
157 s.indexOf('e') >= 0 ||
158 s.indexOf('E') >= 0 )
159 {
160 try {
161 Double.parseDouble(s) ;
162 return s ;
163 } catch (NumberFormatException nfe) {}
164 }
166 }
167 }
168
169 StringBuffer sbuff = new StringBuffer () ;
171 sbuff.append("\"") ;
172 sbuff.append(s) ;
173 sbuff.append("\"") ;
174
175 if ( lang != null && lang.length()>0)
177 {
178 sbuff.append("@") ;
179 sbuff.append(lang) ;
180 }
181
182 return sbuff.toString() ;
183 }
184
185
186 public static String stringForResource(Resource r)
187 {
188 return stringForNode(r.getNode(), r.getModel()) ;
189 }
207
208 public static String stringForNode(Node n) { return stringForNode(n, null) ; }
209
210 public static String stringForNode(Node n, PrefixMapping mapping)
211 {
212 if ( n == null )
213 return "<<null>>" ;
214
215 if ( n.isBlank() )
216 {
217 AnonId a = n.getBlankNodeId() ;
218 if ( ! bNodeStrings.containsKey(a) )
219 bNodeStrings.put(a, "_:b"+(bNodeCounter++)) ;
220 return (String )bNodeStrings.get(a) ;
222 }
223 if ( n.isLiteral() )
224 {
225 LiteralLabel ll = n.getLiteral() ;
226 return stringForLiteralLabel(ll) ;
227 }
228 if ( n.isURI() )
229 {
230 String uri = n.getURI() ;
231 if ( mapping != null )
232 {
233 String tmp = mapping.shortForm(n.getURI()) ;
234 if ( tmp != null && !tmp.equals(uri) )
235 return tmp ;
236 }
237
238 return "<"+uri+">" ;
239 }
240 if ( n.isVariable() )
241 return "?"+n.getName() ;
242
243 return n.toString() ;
244 }
245
246 }
247
248
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