From: mike <mike>
Date: Tue, 3 Jul 2007 12:55:56 +0000 (+0000)
Subject: New
X-Git-Tag: v1.5~62
X-Git-Url: http://lists.indexdata.dk/?a=commitdiff_plain;h=80775d57e36e997ab0a4889153a4e366e4a050ce;p=cql-java-moved-to-github.git

New
---

diff --git a/src/org/z3950/zing/cql/CQLSortNode.java b/src/org/z3950/zing/cql/CQLSortNode.java
new file mode 100644
index 0000000..bdcc7d2
--- /dev/null
+++ b/src/org/z3950/zing/cql/CQLSortNode.java
@@ -0,0 +1,68 @@
+// $Id: CQLSortNode.java,v 1.1 2007-07-03 12:55:56 mike Exp $
+
+package org.z3950.zing.cql;
+import java.util.Properties;
+import java.util.Vector;
+
+
+/**
+ * Represents a sort node in a CQL parse-tree.
+ *
+ * @version	$Id: CQLSortNode.java,v 1.1 2007-07-03 12:55:56 mike Exp $
+ */
+public class CQLSortNode extends CQLNode {
+    /**
+     * The root of a subtree representing the query whose result is to
+     * be sorted.
+     */ 
+    public CQLNode subtree;
+
+    /**
+     * The set of sort keys by which results are to be sorted,
+     * each expressed as an index together with zero or more
+     * modifiers.
+     */ 
+    Vector<ModifierSet> keys;
+
+    public CQLSortNode(CQLNode subtree) {
+	this.subtree = subtree;
+	keys = new Vector<ModifierSet>();
+    }
+
+    public void addSortIndex(ModifierSet key) {
+	keys.add(key);
+    }
+
+    public String toXCQL(int level, Vector<CQLPrefix> prefixes,
+			 Vector<ModifierSet> sortkeys) {
+	if (sortkeys != null)
+	    throw new Error("CQLSortNode.toXCQL() called with sortkeys");
+	return subtree.toXCQL(level, prefixes, keys);
+    }
+
+    public String toCQL() {
+	StringBuffer buf = new StringBuffer(subtree.toCQL());
+
+	if (keys != null) {
+	    buf.append(" sortby");
+	    for (int i = 0; i < keys.size(); i++) {
+		ModifierSet key = keys.get(i);
+		buf.append(" " + key.toCQL());
+	    }
+	}
+
+	return buf.toString();
+    }
+
+    public String toPQF(Properties config) throws PQFTranslationException {
+	return "@attr 1=oops \"###\"";
+    }
+
+    public byte[] toType1BER(Properties config)
+	throws PQFTranslationException {
+	// There is no way to represent sorting in a standard Z39.50
+	// Type-1 query, so the best we can do is return the
+	// underlying query and ignore the sort-specification.
+        return subtree.toType1BER(config);
+    }
+}