1/*
2 * Copyright (c) 2009-2010 jMonkeyEngine
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 *   notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above copyright
13 *   notice, this list of conditions and the following disclaimer in the
14 *   documentation and/or other materials provided with the distribution.
15 *
16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
17 *   may be used to endorse or promote products derived from this software
18 *   without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package com.jme3.shader;
34
35import com.jme3.export.*;
36import java.io.IOException;
37import java.util.Map;
38import java.util.SortedMap;
39import java.util.TreeMap;
40
41public class DefineList implements Savable {
42
43    private final SortedMap<String, String> defines = new TreeMap<String, String>();
44    private String compiled = null;
45
46    public void write(JmeExporter ex) throws IOException{
47        OutputCapsule oc = ex.getCapsule(this);
48
49        String[] keys = new String[defines.size()];
50        String[] vals = new String[defines.size()];
51
52        int i = 0;
53        for (Map.Entry<String, String> define : defines.entrySet()){
54            keys[i] = define.getKey();
55            vals[i] = define.getValue();
56            i++;
57        }
58
59        oc.write(keys, "keys", null);
60        oc.write(vals, "vals", null);
61
62        // for compatability only with older versions
63        oc.write(compiled, "compiled", null);
64    }
65
66    public void read(JmeImporter im) throws IOException{
67        InputCapsule ic = im.getCapsule(this);
68
69        String[] keys = ic.readStringArray("keys", null);
70        String[] vals = ic.readStringArray("vals", null);
71        for (int i = 0; i < keys.length; i++){
72            defines.put(keys[i], vals[i]);
73        }
74
75        compiled = ic.readString("compiled", null);
76    }
77
78    public void clear() {
79        defines.clear();
80        compiled = "";
81    }
82
83    public String get(String key){
84        // I do not see the point of forcing a rebuild on get()
85        // so I'm commenting it out. -pspeed
86        //compiled = null;
87        return defines.get(key);
88    }
89
90//    public void set(String key, String val){
91//        compiled = null;
92//        defines.put(key, val);
93//    }
94
95    public boolean set(String key, VarType type, Object val){
96        if (val == null){
97            defines.remove(key);
98            compiled = null;
99            return true;
100        }
101
102        switch (type){
103            case Boolean:
104                if ( ((Boolean) val).booleanValue() ) {
105                    // same literal, != should work
106                    if( defines.put(key, "1") != "1" ) {
107                        compiled = null;
108                        return true;
109                    }
110                } else if (defines.containsKey(key)) {
111                    defines.remove(key);
112                    compiled = null;
113                    return true;
114                }
115
116                break;
117            case Float:
118            case Int:
119                String original = defines.put(key, val.toString());
120                if (!val.equals(original)) {
121                    compiled = null;
122                    return true;
123                }
124                break;
125            default:
126                // same literal, != should work
127                if (defines.put(key, "1") != "1") {
128                    compiled = null;
129                    return true;
130                }
131                break;
132        }
133
134        return false;
135    }
136
137    public boolean remove(String key){
138        if (defines.remove(key) != null) {
139            compiled = null;
140            return true;
141        }
142
143        return false;
144    }
145
146    public void addFrom(DefineList other){
147        if (other == null)
148            return;
149
150        compiled = null;
151        defines.putAll(other.defines);
152    }
153
154    public String getCompiled(){
155        if (compiled == null){
156            StringBuilder sb = new StringBuilder();
157            for (Map.Entry<String, String> entry : defines.entrySet()){
158                sb.append("#define ").append(entry.getKey()).append(" ");
159                sb.append(entry.getValue()).append('\n');
160            }
161            compiled = sb.toString();
162        }
163        return compiled;
164    }
165
166    @Override
167    public String toString(){
168        StringBuilder sb = new StringBuilder();
169        int i = 0;
170        for (Map.Entry<String, String> entry : defines.entrySet()) {
171            sb.append(entry.getKey());
172            if (i != defines.size() - 1)
173                sb.append(", ");
174
175            i++;
176        }
177        return sb.toString();
178    }
179
180}
181