import java.util.Properties;
+
/**
* Represents a node in a CQL parse-tree.
*
* A String containing an XCQL document equivalent to the
* parse-tree whose root is this node.
*/
- public String toXCQL(int level) {
- return toXCQL(level, null);
+ public String toXCQL() {
+ StringBuilder sb = new StringBuilder();
+ toXCQLInternal(new XCQLBuilder(sb), 0);
+ return sb.toString();
}
- public String toXCQL(int level, List<CQLPrefix> prefixes) {
- return toXCQL(level, prefixes, null);
+ void toXCQLInternal(XCQLBuilder b, int level) {
+ toXCQLInternal(b, level, null, null);
}
- abstract public String toXCQL(int level, List<CQLPrefix> prefixes,
- List<ModifierSet> sortkeys);
+ abstract void toXCQLInternal(XCQLBuilder b, int level,
+ List<CQLPrefix> prefixes, List<ModifierSet> sortkeys);
- protected static String renderPrefixes(int level, List<CQLPrefix> prefixes) {
+ static void renderPrefixes(XCQLBuilder b,
+ int level, List<CQLPrefix> prefixes) {
if (prefixes == null || prefixes.size() == 0)
- return "";
- String res = indent(level) + "<prefixes>\n";
+ return;
+ b.indent(level).append("<prefixes>\n");
for (int i = 0; i < prefixes.size(); i++) {
CQLPrefix p = prefixes.get(i);
- res += indent(level+1) + "<prefix>\n";
+ b.indent(level+1).append("<prefix>\n");
if (p.name != null)
- res += indent(level+2) + "<name>" + p.name + "</name>\n";
- res += indent(level+2) +
- "<identifier>" + p.identifier + "</identifier>\n";
- res += indent(level+1) + "</prefix>\n";
+ b.indent(level + 2).append("<name>").
+ append(p.name).append("</name>\n");
+ b.indent(level + 2).append("<identifier>").append(p.identifier).
+ append("</identifier>\n");
+ b.indent(level+1).append("</prefix>\n");
}
- return res + indent(level) + "</prefixes>\n";
+ b.indent(level).append("</prefixes>\n");
}
- protected static String renderSortKeys(int level,
+ static void renderSortKeys(XCQLBuilder b, int level,
List<ModifierSet> sortkeys) {
if (sortkeys == null || sortkeys.size() == 0)
- return "";
- String res = indent(level) + "<sortKeys>\n";
+ return;
+ b.indent(level).append("<sortKeys>\n");
for (int i = 0; i < sortkeys.size(); i++) {
ModifierSet key = sortkeys.get(i);
- res += key.sortKeyToXCQL(level+1);
+ b.append(key.sortKeyToXCQL(level+1));
}
- return res + indent(level) + "</sortKeys>\n";
+ b.indent(level).append("</sortKeys>\n");
}
/**
throws PQFTranslationException;
/**
- * Returns a String of spaces for indenting to the specified level.
- */
- protected static String indent(int level) { return Utils.indent(level); }
-
- /**
- * Returns the argument String quoted for XML.
- * For example, each occurrence of <TT><</TT> is translated to
- * <TT>&lt;</TT>.
- */
- protected static String xq(String str) { return Utils.xq(str); }
-
- /**
* Renders a parser-tree into a BER-endoded packet representing an
* equivalent Z39.50 Type-1 query. If you don't know what that
* means, then you don't need this method :-) This is useful