-// $Id: CQLTermNode.java,v 1.11 2002-11-29 16:43:23 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;
/**
* Represents a terminal node in a CQL parse-tree.
* A term node consists of the term String itself, together with,
- * optionally, a qualifier string and a relation. Neither or both of
- * these must be provided - you can't have a qualifier without a
+ * 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 1.11 2002-11-29 16:43:23 mike Exp $
+ * @version $Id: CQLTermNode.java,v 1.25 2007-06-27 22:39:55 mike Exp $
*/
public class CQLTermNode extends CQLNode {
- private String qualifier;
+ private String index;
private CQLRelation relation;
private String term;
/**
- * Creates a new term node with the specified <TT>qualifier</TT>,
+ * Creates a new term node with the specified <TT>index</TT>,
* <TT>relation</TT> and <TT>term</TT>. The first two may be
* <TT>null</TT>, but the <TT>term</TT> may not.
*/
- public CQLTermNode(String qualifier, CQLRelation relation, String term) {
- this.qualifier = qualifier;
+ public CQLTermNode(String index, CQLRelation relation, String term) {
+ this.index = index;
this.relation = relation;
this.term = term;
}
- public String getQualifier() { return qualifier; }
+ 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) + "<searchClause>\n" +
renderPrefixes(level+1, prefixes) +
- indent(level+1) + "<index>" + xq(qualifier) + "</index>\n" +
- relation.toXCQL(level+1, new Vector()) +
+ indent(level+1) + "<index>" + xq(index) + "</index>\n" +
+ relation.toXCQL(level+1, new Vector<String>()) +
indent(level+1) + "<term>" + xq(term) + "</term>\n" +
indent(level) + "</searchClause>\n");
}
public String toCQL() {
- String quotedQualifier = maybeQuote(qualifier);
+ String quotedIndex = maybeQuote(index);
String quotedTerm = maybeQuote(term);
String res = quotedTerm;
- if (!qualifier.equalsIgnoreCase("srw.serverChoice")) {
+ if (index != null &&
+ !index.equalsIgnoreCase("srw.serverChoice")) {
// ### We don't always need spaces around `relation'.
- res = quotedQualifier + " " + relation.toCQL() + " " + quotedTerm;
+ res = quotedIndex + " " + relation.toCQL() + " " + quotedTerm;
}
return res;
}
- public String toPQF(Properties config) throws PQFTranslationException {
- Vector attrs = new Vector();
+ // ### 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<String> attrs = new Vector<String>();
// Do this first so that if any other truncation or
// completeness attributes are generated, they "overwrite"
if (attr != null)
attrs.add(attr);
- attr = config.getProperty("qualifier." + qualifier);
+ attr = config.getProperty("index." + index);
if (attr == null)
- throw new UnknownQualifierException(qualifier);
+ throw new UnknownQualifierException(index);
attrs.add(attr);
String rel = relation.getBase();
throw new UnknownRelationException(rel);
attrs.add(attr);
- String[] mods = relation.getModifiers();
- for (int i = 0; i < mods.length; i++) {
- attr = config.getProperty("relationModifier." + mods[i]);
+ Vector<Modifier> 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(mods[i]);
+ throw new UnknownRelationModifierException(type);
attrs.add(attr);
}
String pos = "any";
String text = term;
- //System.err.println("before check: text='" + text + "'");
if (text.length() > 0 && text.substring(0, 1).equals("^")) {
- //System.err.println("first in field");
- text = text.substring(1);
+ text = text.substring(1); // ### change not seen by caller
pos = "first";
}
- //System.err.println("between checks: text='" + text + "'");
int len = text.length();
if (len > 0 && text.substring(len-1, len).equals("^")) {
- //System.err.println("last in field");
- text = text.substring(0, len-1);
+ 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?
+ // 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?
}
- //System.err.println("after checks: text='" + text + "'");
+
attr = config.getProperty("position." + pos);
if (attr == null)
throw new UnknownPositionException(pos);
attr = config.getProperty("structure.*");
attrs.add(attr);
- String s = "";
+ 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 ||
return str;
}
+
+ 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;
+ }
+
+ 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;
+
+ 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;
+ }
}