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1
56
57 package org.objectstyle.cayenne.access.jdbc;
58
59 import java.io.IOException  ;
60 import java.io.Writer ;
61 import java.math.BigDecimal ;
62 import java.math.BigInteger ;
63 import java.sql.Date ;
64 import java.sql.Time ;
65 import java.sql.Timestamp ;
66 import java.util.Collection ;
67 import java.util.HashMap ;
68 import java.util.Map ;
69
70 import org.apache.velocity.context.InternalContextAdapter;
71 import org.apache.velocity.exception.MethodInvocationException;
72 import org.apache.velocity.exception.ParseErrorException;
73 import org.apache.velocity.exception.ResourceNotFoundException;
74 import org.apache.velocity.runtime.directive.Directive;
75 import org.apache.velocity.runtime.parser.node.Node;
76 import org.objectstyle.cayenne.util.Util;
77
78
102 public class ResultDirective extends Directive {
103
104 private static final Map typesGuess = new HashMap ();
105
106 static {
107
109 typesGuess.put("long", Long .class.getName());
111 typesGuess.put("double", Double .class.getName());
112 typesGuess.put("byte", Byte .class.getName());
113 typesGuess.put("boolean", Boolean .class.getName());
114 typesGuess.put("float", Float .class.getName());
115 typesGuess.put("short", Short .class.getName());
116 typesGuess.put("int", Integer .class.getName());
117
118 typesGuess.put("Long", Long .class.getName());
120 typesGuess.put("Double", Double .class.getName());
121 typesGuess.put("Byte", Byte .class.getName());
122 typesGuess.put("Boolean", Boolean .class.getName());
123 typesGuess.put("Float", Float .class.getName());
124 typesGuess.put("Short", Short .class.getName());
125 typesGuess.put("Integer", Integer .class.getName());
126
127 typesGuess.put("String", String .class.getName());
129 typesGuess.put("Date", Date .class.getName());
130 typesGuess.put("Time", Time .class.getName());
131 typesGuess.put("Timestamp", Timestamp .class.getName());
132 typesGuess.put("BigDecimal", BigDecimal .class.getName());
133 typesGuess.put("BigInteger", BigInteger .class.getName());
134 }
135
136 public String getName() {
137 return "result";
138 }
139
140 public int getType() {
141 return LINE;
142 }
143
144 public boolean render(InternalContextAdapter context, Writer writer, Node node)
145 throws
146 IOException ,
147 ResourceNotFoundException,
148 ParseErrorException,
149 MethodInvocationException {
150
151 String column = getChildAsString(context, node, 0);
152 if (column == null) {
153 throw new ParseErrorException("Column name expected at line "
154 + node.getLine()
155 + ", column "
156 + node.getColumn());
157 }
158
159 String alias = getChildAsString(context, node, 2);
160 String dataRowKey = getChildAsString(context, node, 3);
161
162 String label = (!Util.isEmptyString(dataRowKey)) ? dataRowKey : (!Util
164 .isEmptyString(alias)) ? alias : null;
165
166
167 ColumnDescriptor columnDescriptor = new ColumnDescriptor();
168 columnDescriptor.setName(column);
169 columnDescriptor.setLabel(label);
170
171 String type = getChildAsString(context, node, 1);
172 if (type != null) {
173 columnDescriptor.setJavaClass(guessType(type.toString()));
174 }
175
176 writer.write(column);
177
178 if (!Util.isEmptyString(alias) && !alias.equals(column)) {
180 writer.write(" AS ");
181 writer.write(alias);
182 }
183
184 bindResult(context, columnDescriptor);
185 return true;
186 }
187
188 protected Object getChild(InternalContextAdapter context, Node node, int i)
189 throws MethodInvocationException {
190 return (i >= 0 && i < node.jjtGetNumChildren())
191 ? node.jjtGetChild(i).value(context)
192 : null;
193 }
194
195
200 protected String getChildAsString(InternalContextAdapter context, Node node, int i)
201 throws MethodInvocationException {
202 Object value = getChild(context, node, i);
203 return (value != null) ? value.toString() : null;
204 }
205
206
211 protected String guessType(String type) {
212 String guessed = (String ) typesGuess.get(type);
213 return guessed != null ? guessed : type;
214 }
215
216
219 protected void bindResult(
220 InternalContextAdapter context,
221 ColumnDescriptor columnDescriptor) {
222
223 Collection resultColumns =
224 (Collection ) context.getInternalUserContext().get(
225 SQLTemplateProcessor.RESULT_COLUMNS_LIST_KEY);
226
227 if (resultColumns != null) {
228 resultColumns.add(columnDescriptor);
229 }
230 }
231 }
232 |
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