X-Git-Url: http://jsfdemo.indexdata.com/?a=blobdiff_plain;f=src%2Forg%2Fz3950%2Fzing%2Fcql%2FCQLNode.java;h=5d731b74f924d95fedc650179c2320ecbe6b29b5;hb=caeab95a0bbe3a694746bb3244e6605c36927c1e;hp=3897c450f562206b89b68d6e8501bd700da03db2;hpb=069f263b3422968c95d2b2a74291f04dfcdb15ac;p=cql-java-moved-to-github.git

diff --git a/src/org/z3950/zing/cql/CQLNode.java b/src/org/z3950/zing/cql/CQLNode.java
index 3897c45..5d731b7 100644
--- a/src/org/z3950/zing/cql/CQLNode.java
+++ b/src/org/z3950/zing/cql/CQLNode.java
@@ -1,13 +1,13 @@
-// $Id: CQLNode.java,v 1.4 2002-10-25 16:11:05 mike Exp $
+// $Id: CQLNode.java,v 1.8 2002-10-30 11:13:18 mike Exp $
 
 package org.z3950.zing.cql;
 
 
 /**
- * Represents a node in a CQL parse-tree ...
+ * Represents a node in a CQL parse-tree.
  * ###
  *
- * @version	$Id: CQLNode.java,v 1.4 2002-10-25 16:11:05 mike Exp $
+ * @version	$Id: CQLNode.java,v 1.8 2002-10-30 11:13:18 mike Exp $
  */
 public abstract class CQLNode {
     abstract String toXCQL(int level);
@@ -21,10 +21,45 @@ public abstract class CQLNode {
 	return x;
     }
 
+    // XML Quote --
+    //	s/&/&/g;
+    //	s/</&lt;/g;
+    //	s/>/&gt;/g;
+    // This is hideously inefficient, but I just don't see a better
+    // way using the standard JAVA library.
+    //
+    protected String xq(String str) {
+	str = replace(str, "&", "&amp;");
+	str = replace(str, "<", "&lt;");
+	str = replace(str, ">", "&gt;");
+	return str;
+    }
+
+    // I can't _believe_ I have to write this by hand in 2002 ...
+    protected static String replace(String str, String from, String to) {
+	StringBuffer sb = new StringBuffer();
+	int ix;			// index of next `from'
+	int offset = 0;		// index of previous `from' + length(from)
+
+	while ((ix = str.indexOf(from, offset)) != -1) {
+	    sb.append(str.substring(offset, ix));
+	    sb.append(to);
+	    offset = ix + from.length();
+	}
+
+	// End of string: append last bit and we're done
+	sb.append(str.substring(offset));
+	return sb.toString();
+    }
+
     // Test harness
     public static void main (String[] args) {
-	CQLNode n1 = new CQLTermNode("dc.author", "=", "kernighan");
-	CQLNode n2 = new CQLTermNode("dc.title", "all", "elements style");
+	CQLNode n1 = new CQLTermNode("dc.author",
+				     new CQLRelation("="),
+				     "kernighan");
+	CQLNode n2 = new CQLTermNode("dc.title",
+				     new CQLRelation("all"),
+				     "elements style");
 	CQLNode root = new CQLAndNode(n1, n2);
 	System.out.println(root.toXCQL(0));
     }