Towards 0.2 --

[cql-java-moved-to-github.git] / src / org / z3950 / zing / cql / CQLTermNode.java

diff --git a/src/org/z3950/zing/cql/CQLTermNode.java b/src/org/z3950/zing/cql/CQLTermNode.java
index fda7147..5889354 100644 (file)
--- a/src/org/z3950/zing/cql/CQLTermNode.java
+++ b/src/org/z3950/zing/cql/CQLTermNode.java
@@ -1,26 +1,40 @@
-// $Id: CQLTermNode.java,v 1.6 2002-10-31 22:22:01 mike Exp $
+// $Id: CQLTermNode.java,v 1.7 2002-11-06 00:05:58 mike Exp $
 
 package org.z3950.zing.cql;
+import java.util.Properties;
+import java.util.Vector;
 
 
 /**
  * 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
+ * relation or vice versa.
  *
- * @version    $Id: CQLTermNode.java,v 1.6 2002-10-31 22:22:01 mike Exp $
+ * @version    $Id: CQLTermNode.java,v 1.7 2002-11-06 00:05:58 mike Exp $
  */
 public class CQLTermNode extends CQLNode {
     private String qualifier;
     private CQLRelation relation;
     private String term;
 
+    /**
+     * Creates a new term node with the specified <TT>qualifier</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;
        this.relation = relation;
        this.term = term;
     }
 
-    String toXCQL(int level) {
+    public String getQualifier() { return qualifier; }
+    public CQLRelation getRelation() { return relation; }
+    public String getTerm() { return term; }
+
+    public String toXCQL(int level) {
        return (indent(level) + "<searchClause>\n" +
                indent(level+1) + "<index>" + xq(qualifier) + "</index>\n" +
                relation.toXCQL(level+1) +
@@ -28,7 +42,7 @@ public class CQLTermNode extends CQLNode {
                indent(level) + "</searchClause>\n");
     }
 
-    String toCQL() {
+    public String toCQL() {
        String quotedQualifier = maybeQuote(qualifier);
        String quotedTerm = maybeQuote(term);
        String res = quotedTerm;
@@ -41,6 +55,43 @@ public class CQLTermNode extends CQLNode {
        return res;
     }
 
+    public String toPQF(Properties config)
+       throws UnknownQualifierException, UnknownRelationException {
+       Vector attrs = new Vector();
+
+       if (qualifier != null) {
+           String s = config.getProperty(qualifier);
+           if (s == null)
+               throw new UnknownQualifierException(qualifier);
+           attrs.add(s);
+       } else {
+           // ### get a default access point from properties?
+       }
+
+       if (relation != null) {
+           String rel = relation.getBase();
+           // ### handle "any" and "all"
+           String s = config.getProperty("cql-java.relation." + rel);
+           if (s == null)
+               throw new UnknownRelationException(rel);
+           attrs.add(s);
+       } else {
+           // ### get a default relation from properties?
+       }
+
+       // ### handle position attributes
+       // ### handle structure attributes
+       // ### handle "always" attributes
+
+       // ### should split Vector elements on spaces
+       String s = "";
+       for (int i = 0; i < attrs.size(); i++) {
+           s += "@attr " + (String) attrs.get(i) + " ";
+       }
+
+       return s + maybeQuote(term);
+    }
+
     static String maybeQuote(String str) {
        // There _must_ be a better way to make this test ...
        if (str.length() == 0 ||