001: package org.zilonis.network.adapter;
002:
003: /**
004: * Copyright (c) 2005 Elie Levy <elie.levy@zilonis.org>
005: * All rights reserved
006: *
007: * This License governs use of the accompanying Software, and your use of the
008: * Software constitutes acceptance of this license.
009: *
010: * You may use this Software for any non-commercial purpose, subject to the
011: * restrictions in this license. Some purposes which can be non-commercial are
012: * teaching, academic research, and personal experimentation. You may also
013: * distribute this Software with books or other teaching materials, or publish
014: * the Software on websites, that are intended to teach the use of the
015: * Software.
016: *
017: *
018: * You may not use or distribute this Software or any derivative works in any
019: * form for commercial purposes. Examples of commercial purposes would be
020: * running business operations, licensing, leasing, or selling the Software, or
021: * distributing the Software for use with commercial products.
022: *
023: * You may modify this Software and distribute the modified Software for
024: * non-commercial purposes, however, you may not grant rights to the Software
025: * or derivative works that are broader than those provided by this License.
026: * For example, you may not distribute modifications of the Software under
027: * terms that would permit commercial use, or under terms that purport to
028: * require the Software or derivative works to be sublicensed to others.
029: *
030: * You may use any information in intangible form that you remember after
031: * accessing the Software. However, this right does not grant you a license to
032: * any of the copyrights or patents for anything you might create using such
033: * information.
034: *
035: * In return, we simply require that you agree:
036: *
037: * Not to remove any copyright or other notices from the Software.
038: *
039: *
040: * That if you distribute the Software in source or object form, you will
041: * include a verbatim copy of this license.
042: *
043: *
044: * That if you distribute derivative works of the Software in source code form
045: * you do so only under a license that includes all of the provisions of this
046: * License, and if you distribute derivative works of the Software solely in
047: * object form you do so only under a license that complies with this License.
048: *
049: *
050: * That if you have modified the Software or created derivative works, and
051: * distribute such modifications or derivative works, you will cause the
052: * modified files to carry prominent notices so that recipients know that they
053: * are not receiving the original Software. Such notices must state: (i) that
054: * you have changed the Software; and (ii) the date of any changes.
055: *
056: *
057: * THAT THE SOFTWARE COMES "AS IS", WITH NO WARRANTIES. THIS MEANS NO EXPRESS,
058: * IMPLIED OR STATUTORY WARRANTY, INCLUDING WITHOUT LIMITATION, WARRANTIES OF
059: * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY WARRANTY OF TITLE
060: * OR NON-INFRINGEMENT. ALSO, YOU MUST PASS THIS DISCLAIMER ON WHENEVER YOU
061: * DISTRIBUTE THE SOFTWARE OR DERIVATIVE WORKS.
062: *
063: *
064: * THAT NEITHER ZILONIS NOR THE AUTHOR WILL BE LIABLE FOR ANY DAMAGES RELATED
065: * TO THE SOFTWARE OR THIS LICENSE, INCLUDING DIRECT, INDIRECT, SPECIAL,
066: * CONSEQUENTIAL OR INCIDENTAL DAMAGES, TO THE MAXIMUM EXTENT THE LAW PERMITS,
067: * NO MATTER WHAT LEGAL THEORY IT IS BASED ON. ALSO, YOU MUST PASS THIS
068: * LIMITATION OF LIABILITY ON WHENEVER YOU DISTRIBUTE THE SOFTWARE OR
069: * DERIVATIVE WORKS.
070: *
071: *
072: * That if you sue anyone over patents that you think may apply to the Software
073: * or anyone's use of the Software, your license to the Software ends
074: * automatically.
075: *
076: *
077: * That your rights under the License end automatically if you breach it in any
078: * way.
079: *
080: *
081: * Elie Levy reserves all rights not expressly granted to you in this
082: * license.
083: *
084: */
085:
086: import org.zilonis.network.Token;
087: import org.zilonis.network.Condition;
088: import org.zilonis.symbol.Triplet;
089:
090: public class BinaryBinding {
091:
092: private int parent;
093: private int field;
094:
095: public BinaryBinding(String variable, Condition earlierConditions) {
096: int parent = 0;
097: while (earlierConditions != null) {
098: Triplet triplet = earlierConditions.getTriplet();
099: for (int field = 0; field < 3; ++field) {
100: if (triplet.get(field).equals(variable)) {
101: this .field = field;
102: this .parent = parent;
103: return;
104: }
105: }
106: earlierConditions = earlierConditions.getPrev();
107: ++parent;
108: }
109: }
110:
111: public static BinaryBinding[] getBindingsFor(
112: ZilonisEvaluator evaluator, Condition earlierConditions) {
113: String variables[] = evaluator.getVariables();
114: BinaryBinding bindings[] = new BinaryBinding[variables.length];
115: for (int i = 0; i < bindings.length; ++i)
116: bindings[i] = new BinaryBinding(variables[i],
117: earlierConditions);
118: return bindings;
119: }
120:
121: public int getParent() {
122: return parent;
123: }
124:
125: public int getField() {
126: return field;
127: }
128:
129: public String getParameter(Token token) {
130: return token.getParent(parent).getWME().get(field);
131: }
132:
133: public String[] getParamters(Token token) {
134: String result[] = new String[1];
135: result[0] = getParameter(token);
136: return result;
137: }
138: }
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