1 // $Id: CQLTermNode.java,v 1.13 2002-12-06 12:35:42 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 1.13 2002-12-06 12:35:42 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 toXCQL(int level, Vector prefixes) {
38 return (indent(level) + "<searchClause>\n" +
39 renderPrefixes(level+1, prefixes) +
40 indent(level+1) + "<index>" + xq(qualifier) + "</index>\n" +
41 relation.toXCQL(level+1, new Vector()) +
42 indent(level+1) + "<term>" + xq(term) + "</term>\n" +
43 indent(level) + "</searchClause>\n");
46 public String toCQL() {
47 String quotedQualifier = maybeQuote(qualifier);
48 String quotedTerm = maybeQuote(term);
49 String res = quotedTerm;
51 if (!qualifier.equalsIgnoreCase("srw.serverChoice")) {
52 // ### We don't always need spaces around `relation'.
53 res = quotedQualifier + " " + relation.toCQL() + " " + quotedTerm;
59 // ### Interaction between this and its callers is not good as
60 // regards truncation of the term and generation of truncation
61 // attributes. Change the interface to fix this.
62 private Vector getAttrs(Properties config) throws PQFTranslationException {
63 Vector attrs = new Vector();
65 // Do this first so that if any other truncation or
66 // completeness attributes are generated, they "overwrite"
67 // those specified here.
69 // ### This approach relies on an unpleasant detail of Index
70 // Data's (admittedly definitive) implementation of PQF,
71 // and should not relied upon.
73 String attr = config.getProperty("always");
77 attr = config.getProperty("qualifier." + qualifier);
79 throw new UnknownQualifierException(qualifier);
82 String rel = relation.getBase();
83 if (rel.equals("=")) {
85 } else if (rel.equals("<=")) {
87 } else if (rel.equals(">=")) {
90 // ### Handling "any" and "all" properly would involve breaking
91 // the string down into a bunch of individual words and ORring
92 // or ANDing them together. Another day.
93 attr = config.getProperty("relation." + rel);
95 throw new UnknownRelationException(rel);
98 String[] mods = relation.getModifiers();
99 for (int i = 0; i < mods.length; i++) {
100 attr = config.getProperty("relationModifier." + mods[i]);
102 throw new UnknownRelationModifierException(mods[i]);
108 if (text.length() > 0 && text.substring(0, 1).equals("^")) {
109 text = text.substring(1);
112 // ### add back the last-in-field stuff
113 attr = config.getProperty("position." + pos);
115 throw new UnknownPositionException(pos);
118 attr = config.getProperty("structure." + rel);
120 attr = config.getProperty("structure.*");
126 public String toPQF(Properties config) throws PQFTranslationException {
127 Vector attrs = getAttrs(config);
130 for (int i = 0; i < attrs.size(); i++) {
131 attr = (String) attrs.get(i);
132 s += "@attr " + Utils.replaceString(attr, " ", " @attr ") + " ";
136 if (text.length() > 0 && text.substring(0, 1).equals("^"))
137 text = text.substring(1);
138 return s + maybeQuote(text);
141 static String maybeQuote(String str) {
142 // There _must_ be a better way to make this test ...
143 if (str.length() == 0 ||
144 str.indexOf('"') != -1 ||
145 str.indexOf(' ') != -1 ||
146 str.indexOf('\t') != -1 ||
147 str.indexOf('=') != -1 ||
148 str.indexOf('<') != -1 ||
149 str.indexOf('>') != -1 ||
150 str.indexOf('/') != -1 ||
151 str.indexOf('(') != -1 ||
152 str.indexOf(')') != -1) {
153 str = '"' + Utils.replaceString(str, "\"", "\\\"") + '"';
162 public byte[] toType1(Properties config) throws PQFTranslationException {
164 if (text.length() > 0 && text.substring(0, 1).equals("^"))
165 text = text.substring(1);
166 String attr, attrList, term = maybeQuote(text);
167 System.out.println("in CQLTermNode.toType101(): PQF=" + toPQF(config));
168 byte[] operand = new byte[text.length()+100];
169 int i, j, offset, type, value;
170 offset = putTag(CONTEXT, 0, CONSTRUCTED, operand, 0); // op
171 operand[offset++]=(byte)(0x80&0xff); // indefinite length
172 offset = putTag(CONTEXT, 102, CONSTRUCTED, operand, offset); // AttributesPlusTerm
173 operand[offset++] = (byte)(0x80&0xff); // indefinite length
174 offset = putTag(CONTEXT, 44, CONSTRUCTED, operand, offset); // AttributeList
175 operand[offset++] = (byte)(0x80&0xff); // indefinite length
176 offset = putTag(UNIVERSAL, SEQUENCE, CONSTRUCTED, operand, offset);
177 operand[offset++] = (byte)(0x80&0xff);
179 Vector attrs = getAttrs(config);
180 for(i = 0; i < attrs.size(); i++) {
181 attrList = (String) attrs.get(i);
182 java.util.StringTokenizer st =
183 new java.util.StringTokenizer(attrList);
184 while (st.hasMoreTokens()) {
185 attr = st.nextToken();
186 j = attr.indexOf('=');
187 offset = putTag(CONTEXT, 120, PRIMITIVE, operand, offset);
188 type = Integer.parseInt(attr.substring(0, j));
189 offset = putLen(numLen(type), operand, offset);
190 offset = putNum(type, operand, offset);
192 offset = putTag(CONTEXT, 121, PRIMITIVE, operand, offset);
193 value = Integer.parseInt(attr.substring(j+1));
194 offset = putLen(numLen(value), operand, offset);
195 offset = putNum(value, operand, offset);
198 operand[offset++] = 0x00; // end of SEQUENCE
199 operand[offset++] = 0x00;
200 operand[offset++] = 0x00; // end of AttributeList
201 operand[offset++] = 0x00;
203 offset = putTag(CONTEXT, 45, PRIMITIVE, operand, offset); // general Term
204 byte[] t = term.getBytes();
205 offset = putLen(t.length, operand, offset);
206 System.arraycopy(t, 0, operand, offset, t.length);
209 operand[offset++] = 0x00; // end of AttributesPlusTerm
210 operand[offset++] = 0x00;
211 operand[offset++] = 0x00; // end of Operand
212 operand[offset++] = 0x00;
213 byte[] o = new byte[offset];
214 System.arraycopy(operand, 0, o, 0, offset);