1 // $Id: ModifierSet.java,v 1.11 2007-06-28 00:23:17 mike Exp $
3 package org.z3950.zing.cql;
4 import java.util.Vector;
5 import java.lang.StringBuffer;
8 * Represents a base String and a set of Modifiers.
10 * This class is used as a workhorse delegate by both CQLRelation and
11 * CQLProxNode - two functionally very separate classes that happen to
12 * require similar data structures and functionality.
14 * A ModifierSet consists of a ``base'' string together with a set of
15 * zero or more <I>type</I> <I>comparison</I> <I>value</I> pairs,
16 * where type, comparison and value are all strings.
18 * @version $Id: ModifierSet.java,v 1.11 2007-06-28 00:23:17 mike Exp $
20 public class ModifierSet {
22 Vector<Modifier> modifiers;
25 * Creates a new ModifierSet with the specified base.
27 public ModifierSet(String base) {
29 modifiers = new Vector<Modifier>();
33 * Returns the base string with which the ModifierSet was created.
35 public String getBase() {
40 * Adds a modifier of the specified <TT>type</TT>, <TT>comparison</TT> and
41 * <TT>value</TT> to a ModifierSet.
43 public void addModifier(String type, String comparison, String value) {
44 // ### Need to have comparison passed in
45 Modifier modifier = new Modifier(type, comparison, value);
46 modifiers.add(modifier);
50 * Returns the value of the modifier in the specified ModifierSet
51 * that corresponds to the specified type.
53 public String modifier(String type) {
54 int n = modifiers.size();
55 for (int i = 0; i < n; i++) {
56 Modifier mod = modifiers.get(i);
57 if (mod.type.equals(type))
64 * Returns an array of the modifiers in a ModifierSet.
66 * An array of Modifiers.
68 public Vector<Modifier> getModifiers() {
72 public String toXCQL(int level, String topLevelElement) {
73 StringBuffer buf = new StringBuffer();
74 buf.append(Utils.indent(level) + "<" + topLevelElement + ">\n");
75 buf.append(Utils.indent(level+1) +
76 "<value>" + Utils.xq(base) + "</value>\n");
77 if (modifiers.size() > 0) {
78 buf.append(Utils.indent(level+1) + "<modifiers>\n");
79 for (int i = 0; i < modifiers.size(); i++) {
80 buf.append(modifiers.get(i).toXCQL(level+2, "comparison"));
82 buf.append(Utils.indent(level+1) + "</modifiers>\n");
84 buf.append(Utils.indent(level) + "</" + topLevelElement + ">\n");
85 return buf.toString();
88 public String toCQL() {
89 StringBuffer buf = new StringBuffer(base);
90 for (int i = 0; i < modifiers.size(); i++) {
91 buf.append("/" + modifiers.get(i).toCQL());
94 return buf.toString();
97 public static void main(String[] args) {
98 if (args.length < 1) {
99 System.err.println("Usage: ModifierSet <base> [<type> <comparison> <name>]...");
103 ModifierSet res = new ModifierSet(args[0]);
104 for (int i = 1; i < args.length; i += 3) {
105 res.addModifier(args[i], args[i+1], args[i+2]);
108 System.out.println(res.toCQL());