1 // $Id: CQLBooleanNode.java,v 1.18 2007-07-03 16:03:00 mike Exp $
3 package org.z3950.zing.cql;
5 import java.util.Properties;
8 * Represents a boolean node in a CQL parse-tree.
10 * @version $Id: CQLBooleanNode.java,v 1.18 2007-07-03 16:03:00 mike Exp $
12 public abstract class CQLBooleanNode extends CQLNode {
17 * The root of a parse-tree representing the left-hand side.
19 public CQLNode getLeft() {
23 private CQLNode right;
26 * The root of a parse-tree representing the right-hand side.
28 public CQLNode getRight() {
34 * The set of modifiers that are applied to this boolean.
36 public List<Modifier> getModifiers() {
37 return ms.getModifiers();
40 protected CQLBooleanNode(CQLNode left, CQLNode right, ModifierSet ms) {
47 void toXCQLInternal(XCQLBuilder b, int level,
48 List<CQLPrefix> prefixes, List<ModifierSet> sortkeys) {
49 b.indent(level).append("<triple>\n");
50 renderPrefixes(b, level + 1, prefixes);
51 ms.toXCQLInternal(b, level + 1, "boolean");
52 b.indent(level + 1).append("<leftOperand>\n");
53 left.toXCQLInternal(b, level + 2);
54 b.indent(level + 1).append("</leftOperand>\n");
55 b.indent(level + 1).append("<rightOperand>\n");
56 right.toXCQLInternal(b, level + 2);
57 b.indent(level + 1).append("</rightOperand>\n");
58 renderSortKeys(b, level + 1, sortkeys);
59 b.indent(level).append("</triple>\n");
63 public String toCQL() {
64 // ### We don't always need parens around the operands
65 return ("(" + left.toCQL() + ")" +
66 " " + ms.toCQL() + " " +
67 "(" + right.toCQL() + ")");
71 public String toPQF(Properties config) throws PQFTranslationException {
72 return ("@" + opPQF() +
73 " " + left.toPQF(config) +
74 " " + right.toPQF(config));
77 // represents the operation for PQF: overridden for CQLProxNode
78 String opPQF() { return ms.getBase(); }
81 public byte[] toType1BER(Properties config) throws PQFTranslationException {
82 System.out.println("in CQLBooleanNode.toType1BER(): PQF=" +
84 byte[] rpn1 = left.toType1BER(config);
85 byte[] rpn2 = right.toType1BER(config);
86 byte[] op = opType1();
87 byte[] rpnStructure = new byte[rpn1.length+rpn2.length+op.length+4];
90 int offset = putTag(CONTEXT, 1, CONSTRUCTED, rpnStructure, 0);
92 rpnStructure[offset++] = (byte)(0x80&0xff); // indefinite length
93 System.arraycopy(rpn1, 0, rpnStructure, offset, rpn1.length);
94 offset += rpn1.length;
95 System.arraycopy(rpn2, 0, rpnStructure, offset, rpn2.length);
96 offset += rpn2.length;
97 System.arraycopy(op, 0, rpnStructure, offset, op.length);
99 rpnStructure[offset++] = 0x00; // end rpnRpnOp
100 rpnStructure[offset++] = 0x00;
104 abstract byte[] opType1();