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1 package com.daffodilwoods.daffodildb.utils.parser;
2
3 import java.util.ArrayList  ;
4 import java.util.Arrays ;
5 import com.daffodilwoods.database.utility.P;
6 import java.lang.reflect.Field ;
7 import java.lang.reflect.Array ;
8 import com.daffodilwoods.daffodildb.utils.DBStack;
9 import com.daffodilwoods.database.resource.*;
10
11 public class UnionProductionRules extends ProductionRules implements ProductionRuleParserConstants{
12
13 UnionProductionRules(ClassLoader classLoader0){
14 super(classLoader0);
15 }
16
17 public String toString(){
18 return ruleKey;
19 }
20
21
22 public Object getComparableObject(){
23 int size = rules == null ? -1 : rules.length-1;
24 StringBuffer result=new StringBuffer ("");
25 for(int i = size ; i >= 0 ; i--){
26 ProductionRules object = (ProductionRules)rules[i];
27 if (object.getComparableObject()!=null)
28 result.append((String )object.getComparableObject());
29 else
30 break;
31 }
32 if ( result.toString().equals("") )
33 return null;
34 this.result = result.toString();
35 return this.result;
36 }
37
38
39 public Object getComparableObjectArray(){
40 int size = rules == null ? -1 : rules.length-1;
41 ArrayList res = new ArrayList ();
42 for(int i = size ; i >= 0 ; i--){
43 ProductionRules object = (ProductionRules)rules[i];
44 Object [] obj = (Object [])object.getComparableObjectArray();
45 if ( obj != null)
46 res.addAll(Arrays.asList(obj));
47 else
48 break;
49 }
50 if ( res.isEmpty() )
51 return null;
52 String arr[] = (String [])res.toArray(new String [0]);
53 this.result = arr;
54 return arr;
55 }
56
57
58 public Object getRecursiveObject(String nameOfRule,DBStack occuredRules){
59 if ( rules == null )
60 return null;
61 ProductionRules production = (ProductionRules)rules[rules.length-1];
62 if ( production.ruleKey.equalsIgnoreCase(nameOfRule) )
63 return new Object []{this};
64 return null;
65 }
66
67 public Object getNonRecursiveObject(String nameOfRule,DBStack occuredRules){
68 if ( rules == null )
69 return null;
70 ProductionRules production = (ProductionRules)rules[rules.length-1];
71 if ( ! (production.ruleKey.equalsIgnoreCase(nameOfRule)) )
72 return new Object []{this};
73 return null;
74 }
75
76
80 Object parsePart(ParseElements pe)throws com.daffodilwoods.database.resource.DException{
81 int rulesSize = rules.length;
82 Object [] parsedRule = new Object [rulesSize];
83 int cmp = 1;
84 for(int i = rulesSize - 1 ; i >= 0 ; i--){
85 ProductionRules object = (ProductionRules)rules[i];
86 String ruleName = object.getProductionRuleName();
87 if (i == rulesSize - 1 && object.recursiveflag && ruleName.equals(pe.recursionState)){
88 if(pe.recursiveObject != null ){
89 parsedRule[i] = pe.recursiveObject;
90 pe.recursiveObject = null;
91 pe.recursionState = null;
92 continue;
93 }
94 else{
95 return pe.parseException;
96 }
97 }
98 else if(pe.recursiveObject != null && !ruleName.equalsIgnoreCase(pe.recursionState)){
99 return pe.parseException;
100 }
101 Object value = object.parse(pe);
102 if(!(value instanceof ParseException)){
103 parsedRule[i] = value;
104 cmp = 2;
105 }
106 else{
107 if ( !pe.tokenFlag && ( cmp == 1 || cmp == 2 ) && (object instanceof OrProductionRules || object instanceof OrProductionRulesWithHashMap ) )
108 pe.parseException.setReturnType(2);
109 return pe.parseException;
110 }
111 }
112 ArrayList arr = new ArrayList (Arrays.asList(parsedRule));
113 boolean ff = checkArrayList(arr);
114 return ff ? getObjectOfClass(arr.toArray()) : arr.get(0) ;
115 }
116
117 private boolean checkArrayList(ArrayList arr){
118 boolean ff = true;
119 for (int i = updatedRules.length - 1; i >= 0; i--) {
120 if(updatedRules[i] == null){
121 arr.remove(i);
122 ff = !ff;
123 }
124 }
125 if(repUnion){
126 Object o1 = arr.remove(1); Object o0 = arr.remove(0); if(o0 == null){
129 Object array = Array.newInstance(o1.getClass(),1);
130 Array.set(array,0,o1);
131 arr.add(array);
132 }else{
133 int length = Array.getLength(o0);
134 Object array = Array.newInstance(o0.getClass().getComponentType(),length+1);
135 Array.set(array,0,o1);
136 for (int i = 0,j = 1; i < length; i++,j++) {
137 Array.set(array,j,Array.get(o0,i));
138 }
139 arr.add(array);
140 }
141 return true;
142 }
143 return ff;
144 }
145
146 Object getObjectOfClass(Object [] parsedObject) throws DException{
147 Object tempObject = null;
148 int i = parsedObject.length - 1;
149 try{
150 if ( classMaker == null ){
151 try{
152 Class cls = classLoader.loadClass(className);
153 loadFields(i,cls);
154 classMaker = cls ;
155 }catch(NoClassDefFoundError ne){
156 throw ne;
157 }
158 }
159
160 tempObject = classMaker.newInstance();
161 for(; i >= 0 ; i--){
162 ((Field )fields[i]).set(tempObject,parsedObject[i]);
163 }
164 }catch(Exception E){
165 throw new DException("DSE0",new Object []{E.getMessage() });
166
167 }
168 return tempObject;
169 }
170
171
172
173 }
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