|
1
30 package com.genimen.djeneric.tools.scriptengine.core.nodes;
31
32 import java.util.HashMap  ;
33
34 import com.genimen.djeneric.language.Messages;
35 import com.genimen.djeneric.repository.DjExtent;
36 import com.genimen.djeneric.repository.DjList;
37 import com.genimen.djeneric.repository.DjObject;
38 import com.genimen.djeneric.repository.exceptions.ObjectNotDefinedException;
39 import com.genimen.djeneric.tools.scriptengine.core.DjScriptParserEngine;
40 import com.genimen.djeneric.tools.scriptengine.core.SimpleNode;
41 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptCompileTimeScope;
42 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptExecutionException;
43 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptExecutionTimeScope;
44 import com.genimen.djeneric.tools.scriptengine.core.util.Variable;
45
46 public class SetNode extends SimpleNode
47 {
48 String _setName = "";
49
50 public SetNode(int i)
51 {
52 super(i);
53 }
54
55 public SetNode(DjScriptParserEngine p, int i)
56 {
57 super(p, i);
58 }
59
60 public String getName()
61 {
62 return "set";
63 }
64
65 public String toString()
66 {
67 return "";
68 }
69
70 public void execute(DjScriptExecutionTimeScope context) throws DjScriptExecutionException
71 {
72 ValueExpression val = (ValueExpression) getChild(0);
73 Object o = val.getValue(context);
74 if (!(o instanceof DjList)) throw new DjScriptExecutionException(Messages.getString("SetNode.NotASet"), this);
75 DjList lst = (DjList) o;
76
77 FilterNode filter = null;
78 OrderByNode orderBy = null;
79
80 for (int i = 1; i < getChildCount(); i++)
81 {
82 if (getChild(i) instanceof FilterNode) filter = (FilterNode) getChild(i);
83 if (getChild(i) instanceof OrderByNode) orderBy = (OrderByNode) getChild(i);
84 }
85
86 lst = processFilter(lst, context, filter);
87 processOrderBy(lst, orderBy);
88
89 context.getVariableStack().push(getSetName(), lst);
90 }
91
92 public String getSetName()
93 {
94 return _setName;
95 }
96
97 public void setSetName(String n)
98 {
99 _setName = n;
100 }
101
102 public DjList processFilter(DjList lst, DjScriptExecutionTimeScope context, FilterNode filter)
103 throws DjScriptExecutionException
104 {
105 if (filter != null)
107 {
108 DjList filteredSet = new DjList();
109 context.mark();
110 Variable co = new Variable(getSetName(), null);
111 context.pushVariable(co);
112 for (int i = 0; i < lst.size(); i++)
113 {
114 co.setObject(lst.getDjenericObjectAt(i));
115 if (filter.isTrue(context)) filteredSet.add(lst.getDjenericObjectAt(i));
116 }
117 lst = filteredSet;
118
119 context.releaseToMark();
120 }
121 return lst;
122 }
123
124 public void processOrderBy(DjList lst, OrderByNode orderBy) throws DjScriptExecutionException
125 {
126 if (orderBy != null)
127 {
128 try
129 {
130 String [] props = orderBy.getProperties();
131 int[] idxs = new int[props.length];
132 DjObject dob = lst.getDjenericObjectAt(0);
133
134 for (int i = 0; i < props.length; i++)
135 {
136 idxs[i] = dob.getPropertyIndex(props[i]);
137 }
138 lst.sort(idxs);
139 }
140 catch (ObjectNotDefinedException onde)
141 {
142 throw new DjScriptExecutionException(Messages.getString("SetNode.OrderBy", onde.getMessage()), orderBy);
143 }
144 }
145 }
146
147 public String getValidatedTypeName(DjScriptCompileTimeScope context) throws DjScriptExecutionException
148 {
149 ValueExpression val = (ValueExpression) getChild(0);
150
151 String typeName = val.getValidatedTypeName(context);
152 try
153 {
154 DjExtent ext = context.getPersistenceManager().getExtentByObjectType(typeName);
155
156 Variable variable = new Variable(getSetName(), new DjList(ext));
157 context.pushVariable(variable);
158
159 return typeName;
160 }
161 catch (ObjectNotDefinedException onde)
162 {
163 throw new DjScriptExecutionException(onde, this);
164 }
165 }
166
167 public void validateScript(DjScriptCompileTimeScope ctxt) throws DjScriptExecutionException
168 {
169 getValidatedTypeName(ctxt);
170 }
171
172 public void collectVariables(DjScriptCompileTimeScope ctxt, HashMap variables, int stopAtLine)
173 throws DjScriptExecutionException
174 {
175 if (stopAtLine >= 0 && getLine() > stopAtLine) return;
176 variables.put(getSetName(), getValidatedTypeName(ctxt));
177 }
178
179 } |
Popular Tags |
Java API By Example, From Geeks To Geeks.