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 625aab0..5889354 100644 (file)
--- a/src/org/z3950/zing/cql/CQLTermNode.java
+++ b/src/org/z3950/zing/cql/CQLTermNode.java
@@ -1,54 +1,112 @@
-// $Id: CQLTermNode.java,v 1.2 2002-10-25 16:01:26 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 ...
- * ###
+ * 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 1.2 2002-10-25 16:01:26 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 String relation;
-    private String value;
+    private CQLRelation relation;
+    private String term;
 
-    public CQLTermNode(String qualifier, String relation, String value) {
+    /**
+     * 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.value = value;
+       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>" + qualifier + "<index>\n" +
-               indent(level+1) + "<relation>" + relation + "<relation>\n" +
-               indent(level+1) + "<term>" + value + "<term>\n" +
+               indent(level+1) + "<index>" + xq(qualifier) + "</index>\n" +
+               relation.toXCQL(level+1) +
+               indent(level+1) + "<term>" + xq(term) + "</term>\n" +
                indent(level) + "</searchClause>\n");
     }
 
-    String toCQL() {
-       String res = value;
+    public String toCQL() {
+       String quotedQualifier = maybeQuote(qualifier);
+       String quotedTerm = maybeQuote(term);
+       String res = quotedTerm;
 
-       if (res.indexOf('"') != -1) {
-           // ### precede each '"' with a '/'
+       if (!qualifier.equalsIgnoreCase("srw.serverChoice")) {
+           // ### We don't always need spaces around `relation'.
+           res = quotedQualifier + " " + relation.toCQL() + " " + quotedTerm;
        }
 
-       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 + '"';
+       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 ||
+           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, "\"", "\\\"") + '"';
        }
 
-       // ### The qualifier may need quoting.
-       // ### We don't always need spaces around `relation'.
-       return qualifier + " " + relation + " " + value;
+       return str;
     }
 }