X-Git-Url: http://jsfdemo.indexdata.com/?a=blobdiff_plain;f=src%2Forg%2Fz3950%2Fzing%2Fcql%2FCQLTermNode.java;h=fc310ede2d2fe44ec3b96ce5dee816384312a81e;hb=55136632bf2d7d9a54fe08bbb89bed6c03eb70b1;hp=b12883e5acd39fcbb2d67fff7d02d3d0dd6d8b97;hpb=e52d49ef72a0d4531500e3e790fbe2e47fda8cba;p=cql-java-moved-to-github.git
diff --git a/src/org/z3950/zing/cql/CQLTermNode.java b/src/org/z3950/zing/cql/CQLTermNode.java
index b12883e..fc310ed 100644
--- a/src/org/z3950/zing/cql/CQLTermNode.java
+++ b/src/org/z3950/zing/cql/CQLTermNode.java
@@ -1,54 +1,275 @@
-// $Id: CQLTermNode.java,v 1.1 2002-10-25 07:38:17 mike Exp $
+// $Id: CQLTermNode.java,v 1.25 2007-06-27 22:39:55 mike Exp $
package org.z3950.zing.cql;
+import java.util.Properties;
+import java.util.Vector;
/**
- * Represents a terminal node in a CQL parse-tree ...
- * ###
+ * Represents a terminal node in a CQL parse-tree.
+ * A term node consists of the term String itself, together with,
+ * optionally, an index string and a relation. Neither or both of
+ * these must be provided - you can't have an index without a
+ * relation or vice versa.
*
- * @version $Id: CQLTermNode.java,v 1.1 2002-10-25 07:38:17 mike Exp $
+ * @version $Id: CQLTermNode.java,v 1.25 2007-06-27 22:39:55 mike Exp $
*/
-class CQLTermNode extends CQLNode {
- private String qualifier;
- private String relation;
- private String value;
+public class CQLTermNode extends CQLNode {
+ private String index;
+ private CQLRelation relation;
+ private String term;
- public CQLTermNode(String qualifier, String relation, String value) {
- this.qualifier = qualifier;
+ /**
+ * Creates a new term node with the specified index,
+ * relation and term. The first two may be
+ * null, but the term may not.
+ */
+ public CQLTermNode(String index, CQLRelation relation, String term) {
+ this.index = index;
this.relation = relation;
- this.value = value;
+ this.term = term;
}
- String toXCQL(int level) {
+ public String getIndex() { return index; }
+ public String getQualifier() { return getIndex(); } // for legacy applications
+ public CQLRelation getRelation() { return relation; }
+ public String getTerm() { return term; }
+
+ private static boolean isResultSetIndex(String qual) {
+ return (qual.equals("srw.resultSet") ||
+ qual.equals("srw.resultSetId") ||
+ qual.equals("srw.resultSetName"));
+ }
+
+ public String getResultSetName() {
+ if (isResultSetIndex(index))
+ return term;
+ else
+ return null;
+ }
+
+ public String toXCQL(int level, Vector prefixes) {
return (indent(level) + "\n" +
- indent(level+1) + "" + qualifier + "\n" +
- indent(level+1) + "" + relation + "\n" +
- indent(level+1) + "" + value + "\n" +
+ renderPrefixes(level+1, prefixes) +
+ indent(level+1) + "" + xq(index) + "\n" +
+ relation.toXCQL(level+1, new Vector()) +
+ indent(level+1) + "" + xq(term) + "\n" +
indent(level) + "\n");
}
- String toCQL() {
- String res = value;
+ public String toCQL() {
+ String quotedIndex = maybeQuote(index);
+ String quotedTerm = maybeQuote(term);
+ String res = quotedTerm;
+
+ if (index != null &&
+ !index.equalsIgnoreCase("srw.serverChoice")) {
+ // ### We don't always need spaces around `relation'.
+ res = quotedIndex + " " + relation.toCQL() + " " + quotedTerm;
+ }
+
+ return res;
+ }
+
+ // ### Interaction between this and its callers is not good as
+ // regards truncation of the term and generation of truncation
+ // attributes. Change the interface to fix this.
+ private Vector getAttrs(Properties config) throws PQFTranslationException {
+ Vector attrs = new Vector();
+
+ // Do this first so that if any other truncation or
+ // completeness attributes are generated, they "overwrite"
+ // those specified here.
+ //
+ // ### This approach relies on an unpleasant detail of Index
+ // Data's (admittedly definitive) implementation of PQF,
+ // and should not relied upon.
+ //
+ String attr = config.getProperty("always");
+ if (attr != null)
+ attrs.add(attr);
+
+ attr = config.getProperty("index." + index);
+ if (attr == null)
+ throw new UnknownQualifierException(index);
+ attrs.add(attr);
+
+ String rel = relation.getBase();
+ if (rel.equals("=")) {
+ rel = "eq";
+ } else if (rel.equals("<=")) {
+ rel = "le";
+ } else if (rel.equals(">=")) {
+ rel = "ge";
+ }
+ // ### Handling "any" and "all" properly would involve breaking
+ // the string down into a bunch of individual words and ORring
+ // or ANDing them together. Another day.
+ attr = config.getProperty("relation." + rel);
+ if (attr == null)
+ throw new UnknownRelationException(rel);
+ attrs.add(attr);
+
+ Vector mods = relation.getModifiers();
+ for (int i = 0; i < mods.size(); i++) {
+ String type = mods.get(i).type;
+ attr = config.getProperty("relationModifier." + type);
+ if (attr == null)
+ throw new UnknownRelationModifierException(type);
+ attrs.add(attr);
+ }
+
+ String pos = "any";
+ String text = term;
+ if (text.length() > 0 && text.substring(0, 1).equals("^")) {
+ text = text.substring(1); // ### change not seen by caller
+ pos = "first";
+ }
+ int len = text.length();
+ if (len > 0 && text.substring(len-1, len).equals("^")) {
+ text = text.substring(0, len-1); // ### change not seen by caller
+ pos = pos.equals("first") ? "firstAndLast" : "last";
+ // ### in the firstAndLast case, the standard
+ // pqf.properties file specifies that we generate a
+ // completeness=whole-field attributem, which means that
+ // we don't generate a position attribute at all. Do we
+ // care? Does it matter?
+ }
+
+ attr = config.getProperty("position." + pos);
+ if (attr == null)
+ throw new UnknownPositionException(pos);
+ attrs.add(attr);
+
+ attr = config.getProperty("structure." + rel);
+ if (attr == null)
+ attr = config.getProperty("structure.*");
+ attrs.add(attr);
+
+ return attrs;
+ }
+
+ public String toPQF(Properties config) throws PQFTranslationException {
+ if (isResultSetIndex(index)) {
+ // Special case: ignore relation, modifiers, wildcards, etc.
+ // There's parallel code in toType1BER()
+ return "@set " + maybeQuote(term);
+ }
+
+ Vector attrs = getAttrs(config);
+
+ String attr, s = "";
+ for (int i = 0; i < attrs.size(); i++) {
+ attr = (String) attrs.get(i);
+ s += "@attr " + Utils.replaceString(attr, " ", " @attr ") + " ";
+ }
+
+ String text = term;
+ if (text.length() > 0 && text.substring(0, 1).equals("^"))
+ text = text.substring(1);
+ int len = text.length();
+ if (len > 0 && text.substring(len-1, len).equals("^"))
+ text = text.substring(0, len-1);
+
+ return s + maybeQuote(text);
+ }
+
+ static String maybeQuote(String str) {
+ if (str == null)
+ return null;
+
+ // There _must_ be a better way to make this test ...
+ if (str.length() == 0 ||
+ str.indexOf('"') != -1 ||
+ str.indexOf(' ') != -1 ||
+ str.indexOf('\t') != -1 ||
+ str.indexOf('=') != -1 ||
+ str.indexOf('<') != -1 ||
+ str.indexOf('>') != -1 ||
+ str.indexOf('/') != -1 ||
+ str.indexOf('(') != -1 ||
+ str.indexOf(')') != -1) {
+ str = '"' + Utils.replaceString(str, "\"", "\\\"") + '"';
+ }
+
+ return str;
+ }
- if (res.indexOf('"') != -1) {
- // ### precede each '"' with a '/'
+ public byte[] toType1BER(Properties config) throws PQFTranslationException {
+ if (isResultSetIndex(index)) {
+ // Special case: ignore relation, modifiers, wildcards, etc.
+ // There's parallel code in toPQF()
+ byte[] operand = new byte[term.length()+100];
+ int offset;
+ offset = putTag(CONTEXT, 0, CONSTRUCTED, operand, 0); // op
+ operand[offset++] = (byte)(0x80&0xff); // indefinite length
+ offset = putTag(CONTEXT, 31, PRIMITIVE, operand, offset); // ResultSetId
+ byte[] t = term.getBytes();
+ offset = putLen(t.length, operand, offset);
+ System.arraycopy(t, 0, operand, offset, t.length);
+ offset += t.length;
+ operand[offset++] = 0x00; // end of Operand
+ operand[offset++] = 0x00;
+ byte[] o = new byte[offset];
+ System.arraycopy(operand, 0, o, 0, offset);
+ return o;
}
- if (res.indexOf('"') != -1 ||
- res.indexOf(' ') != -1 ||
- res.indexOf('\t') != -1 ||
- res.indexOf('=') != -1 ||
- res.indexOf('<') != -1 ||
- res.indexOf('>') != -1 ||
- res.indexOf('/') != -1 ||
- res.indexOf('(') != -1 ||
- res.indexOf(')') != -1) {
- res = '"' + res + '"';
+ String text = term;
+ if (text.length() > 0 && text.substring(0, 1).equals("^"))
+ text = text.substring(1);
+ int len = text.length();
+ if (len > 0 && text.substring(len-1, len).equals("^"))
+ text = text.substring(0, len-1);
+
+ String attr, attrList, term = text;
+ byte[] operand = new byte[text.length()+100];
+ int i, j, offset, type, value;
+ offset = putTag(CONTEXT, 0, CONSTRUCTED, operand, 0); // op
+ operand[offset++]=(byte)(0x80&0xff); // indefinite length
+ offset = putTag(CONTEXT, 102, CONSTRUCTED, operand, offset); // AttributesPlusTerm
+ operand[offset++] = (byte)(0x80&0xff); // indefinite length
+ offset = putTag(CONTEXT, 44, CONSTRUCTED, operand, offset); // AttributeList
+ operand[offset++] = (byte)(0x80&0xff); // indefinite length
+
+ Vector attrs = getAttrs(config);
+ for(i = 0; i < attrs.size(); i++) {
+ attrList = (String) attrs.get(i);
+ java.util.StringTokenizer st =
+ new java.util.StringTokenizer(attrList);
+ while (st.hasMoreTokens()) {
+ attr = st.nextToken();
+ j = attr.indexOf('=');
+ offset = putTag(UNIVERSAL, SEQUENCE, CONSTRUCTED, operand, offset);
+ operand[offset++] = (byte)(0x80&0xff);
+ offset = putTag(CONTEXT, 120, PRIMITIVE, operand, offset);
+ type = Integer.parseInt(attr.substring(0, j));
+ offset = putLen(numLen(type), operand, offset);
+ offset = putNum(type, operand, offset);
+
+ offset = putTag(CONTEXT, 121, PRIMITIVE, operand, offset);
+ value = Integer.parseInt(attr.substring(j+1));
+ offset = putLen(numLen(value), operand, offset);
+ offset = putNum(value, operand, offset);
+ operand[offset++] = 0x00; // end of SEQUENCE
+ operand[offset++] = 0x00;
+ }
}
+ operand[offset++] = 0x00; // end of AttributeList
+ operand[offset++] = 0x00;
+
+ offset = putTag(CONTEXT, 45, PRIMITIVE, operand, offset); // general Term
+ byte[] t = term.getBytes();
+ offset = putLen(t.length, operand, offset);
+ System.arraycopy(t, 0, operand, offset, t.length);
+ offset += t.length;
- // ### The qualifier may need quoting.
- // ### We don't always need spaces around `relation'.
- return qualifier + " " + relation + " " + value;
+ operand[offset++] = 0x00; // end of AttributesPlusTerm
+ operand[offset++] = 0x00;
+ operand[offset++] = 0x00; // end of Operand
+ operand[offset++] = 0x00;
+ byte[] o = new byte[offset];
+ System.arraycopy(operand, 0, o, 0, offset);
+ return o;
}
}