1 // $Id: CQLTermNode.java,v 1.18 2002-12-12 10:24:25 mike Exp $
3 package org.z3950.zing.cql;
4 import java.util.Properties;
5 import java.util.Vector;
9 * Represents a terminal node in a CQL parse-tree.
10 * A term node consists of the term String itself, together with,
11 * optionally, a qualifier string and a relation. Neither or both of
12 * these must be provided - you can't have a qualifier without a
13 * relation or vice versa.
15 * @version $Id: CQLTermNode.java,v 1.18 2002-12-12 10:24:25 mike Exp $
17 public class CQLTermNode extends CQLNode {
18 private String qualifier;
19 private CQLRelation relation;
23 * Creates a new term node with the specified <TT>qualifier</TT>,
24 * <TT>relation</TT> and <TT>term</TT>. The first two may be
25 * <TT>null</TT>, but the <TT>term</TT> may not.
27 public CQLTermNode(String qualifier, CQLRelation relation, String term) {
28 this.qualifier = qualifier;
29 this.relation = relation;
33 public String getQualifier() { return qualifier; }
34 public CQLRelation getRelation() { return relation; }
35 public String getTerm() { return term; }
37 public String getResultSetName() {
38 if (qualifier.equals("srw.resultSet"))
44 public String toXCQL(int level, Vector prefixes) {
45 return (indent(level) + "<searchClause>\n" +
46 renderPrefixes(level+1, prefixes) +
47 indent(level+1) + "<index>" + xq(qualifier) + "</index>\n" +
48 relation.toXCQL(level+1, new Vector()) +
49 indent(level+1) + "<term>" + xq(term) + "</term>\n" +
50 indent(level) + "</searchClause>\n");
53 public String toCQL() {
54 String quotedQualifier = maybeQuote(qualifier);
55 String quotedTerm = maybeQuote(term);
56 String res = quotedTerm;
58 if (!qualifier.equalsIgnoreCase("srw.serverChoice")) {
59 // ### We don't always need spaces around `relation'.
60 res = quotedQualifier + " " + relation.toCQL() + " " + quotedTerm;
66 // ### Interaction between this and its callers is not good as
67 // regards truncation of the term and generation of truncation
68 // attributes. Change the interface to fix this.
69 private Vector getAttrs(Properties config) throws PQFTranslationException {
70 Vector attrs = new Vector();
72 // Do this first so that if any other truncation or
73 // completeness attributes are generated, they "overwrite"
74 // those specified here.
76 // ### This approach relies on an unpleasant detail of Index
77 // Data's (admittedly definitive) implementation of PQF,
78 // and should not relied upon.
80 String attr = config.getProperty("always");
84 attr = config.getProperty("qualifier." + qualifier);
86 throw new UnknownQualifierException(qualifier);
89 String rel = relation.getBase();
90 if (rel.equals("=")) {
92 } else if (rel.equals("<=")) {
94 } else if (rel.equals(">=")) {
97 // ### Handling "any" and "all" properly would involve breaking
98 // the string down into a bunch of individual words and ORring
99 // or ANDing them together. Another day.
100 attr = config.getProperty("relation." + rel);
102 throw new UnknownRelationException(rel);
105 String[] mods = relation.getModifiers();
106 for (int i = 0; i < mods.length; i++) {
107 attr = config.getProperty("relationModifier." + mods[i]);
109 throw new UnknownRelationModifierException(mods[i]);
115 if (text.length() > 0 && text.substring(0, 1).equals("^")) {
116 text = text.substring(1); // ### change not seen by caller
119 int len = text.length();
120 if (len > 0 && text.substring(len-1, len).equals("^")) {
121 text = text.substring(0, len-1); // ### change not seen by caller
122 pos = pos.equals("first") ? "firstAndLast" : "last";
123 // ### in the firstAndLast case, the standard
124 // pqf.properties file specifies that we generate a
125 // completeness=whole-field attributem, which means that
126 // we don't generate a position attribute at all. Do we
127 // care? Does it matter?
130 attr = config.getProperty("position." + pos);
132 throw new UnknownPositionException(pos);
135 attr = config.getProperty("structure." + rel);
137 attr = config.getProperty("structure.*");
143 public String toPQF(Properties config) throws PQFTranslationException {
144 if (qualifier.equals("srw.resultSet")) {
145 // Special case: ignore relation, modifiers, wildcards, etc.
146 // There's parallel code in toType1BER()
147 return "@set " + maybeQuote(term);
150 Vector attrs = getAttrs(config);
153 for (int i = 0; i < attrs.size(); i++) {
154 attr = (String) attrs.get(i);
155 s += "@attr " + Utils.replaceString(attr, " ", " @attr ") + " ";
159 if (text.length() > 0 && text.substring(0, 1).equals("^"))
160 text = text.substring(1);
161 int len = text.length();
162 if (len > 0 && text.substring(len-1, len).equals("^"))
163 text = text.substring(0, len-1);
165 return s + maybeQuote(text);
168 static String maybeQuote(String str) {
169 // There _must_ be a better way to make this test ...
170 if (str.length() == 0 ||
171 str.indexOf('"') != -1 ||
172 str.indexOf(' ') != -1 ||
173 str.indexOf('\t') != -1 ||
174 str.indexOf('=') != -1 ||
175 str.indexOf('<') != -1 ||
176 str.indexOf('>') != -1 ||
177 str.indexOf('/') != -1 ||
178 str.indexOf('(') != -1 ||
179 str.indexOf(')') != -1) {
180 str = '"' + Utils.replaceString(str, "\"", "\\\"") + '"';
186 public byte[] toType1BER(Properties config) throws PQFTranslationException {
187 if (qualifier.equals("srw.resultSet")) {
188 // Special case: ignore relation, modifiers, wildcards, etc.
189 // There's parallel code in toPQF()
190 byte[] operand = new byte[term.length()+100];
192 offset = putTag(CONTEXT, 0, CONSTRUCTED, operand, 0); // op
193 operand[offset++] = (byte)(0x80&0xff); // indefinite length
194 offset = putTag(CONTEXT, 31, PRIMITIVE, operand, offset); // ResultSetId
195 byte[] t = term.getBytes();
196 offset = putLen(t.length, operand, offset);
197 System.arraycopy(t, 0, operand, offset, t.length);
199 operand[offset++] = 0x00; // end of Operand
200 operand[offset++] = 0x00;
201 byte[] o = new byte[offset];
202 System.arraycopy(operand, 0, o, 0, offset);
207 if (text.length() > 0 && text.substring(0, 1).equals("^"))
208 text = text.substring(1);
209 int len = text.length();
210 if (len > 0 && text.substring(len-1, len).equals("^"))
211 text = text.substring(0, len-1);
213 String attr, attrList, term = maybeQuote(text);
214 System.out.println("in CQLTermNode.toType1BER(): PQF=" + toPQF(config));
215 byte[] operand = new byte[text.length()+100];
216 int i, j, offset, type, value;
217 offset = putTag(CONTEXT, 0, CONSTRUCTED, operand, 0); // op
218 operand[offset++]=(byte)(0x80&0xff); // indefinite length
219 offset = putTag(CONTEXT, 102, CONSTRUCTED, operand, offset); // AttributesPlusTerm
220 operand[offset++] = (byte)(0x80&0xff); // indefinite length
221 offset = putTag(CONTEXT, 44, CONSTRUCTED, operand, offset); // AttributeList
222 operand[offset++] = (byte)(0x80&0xff); // indefinite length
223 offset = putTag(UNIVERSAL, SEQUENCE, CONSTRUCTED, operand, offset);
224 operand[offset++] = (byte)(0x80&0xff);
226 Vector attrs = getAttrs(config);
227 for(i = 0; i < attrs.size(); i++) {
228 attrList = (String) attrs.get(i);
229 java.util.StringTokenizer st =
230 new java.util.StringTokenizer(attrList);
231 while (st.hasMoreTokens()) {
232 attr = st.nextToken();
233 j = attr.indexOf('=');
234 offset = putTag(CONTEXT, 120, PRIMITIVE, operand, offset);
235 type = Integer.parseInt(attr.substring(0, j));
236 offset = putLen(numLen(type), operand, offset);
237 offset = putNum(type, operand, offset);
239 offset = putTag(CONTEXT, 121, PRIMITIVE, operand, offset);
240 value = Integer.parseInt(attr.substring(j+1));
241 offset = putLen(numLen(value), operand, offset);
242 offset = putNum(value, operand, offset);
245 operand[offset++] = 0x00; // end of SEQUENCE
246 operand[offset++] = 0x00;
247 operand[offset++] = 0x00; // end of AttributeList
248 operand[offset++] = 0x00;
250 offset = putTag(CONTEXT, 45, PRIMITIVE, operand, offset); // general Term
251 byte[] t = term.getBytes();
252 offset = putLen(t.length, operand, offset);
253 System.arraycopy(t, 0, operand, offset, t.length);
256 operand[offset++] = 0x00; // end of AttributesPlusTerm
257 operand[offset++] = 0x00;
258 operand[offset++] = 0x00; // end of Operand
259 operand[offset++] = 0x00;
260 byte[] o = new byte[offset];
261 System.arraycopy(operand, 0, o, 0, offset);