| 1 | package org.apache.velocity.runtime.visitor; |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2000-2001,2004 The Apache Software Foundation. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | import java.io.Writer; |
| 20 | |
| 21 | import org.apache.velocity.context.InternalContextAdapter; |
| 22 | |
| 23 | import org.apache.velocity.runtime.parser.node.*; |
| 24 | |
| 25 | /** |
| 26 | * This is the base class for all visitors. |
| 27 | * For each AST node, this class will provide |
| 28 | * a bare-bones method for traversal. |
| 29 | * |
| 30 | * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a> |
| 31 | * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a> |
| 32 | * @version $Id: BaseVisitor.java,v 1.12.4.1 2004/03/03 23:23:02 geirm Exp $ |
| 33 | */ |
| 34 | public abstract class BaseVisitor implements ParserVisitor |
| 35 | { |
| 36 | /** Context used during traversal */ |
| 37 | protected InternalContextAdapter context; |
| 38 | |
| 39 | /** Writer used as the output sink */ |
| 40 | protected Writer writer; |
| 41 | |
| 42 | public void setWriter( Writer writer ) |
| 43 | { |
| 44 | this.writer = writer; |
| 45 | } |
| 46 | |
| 47 | public void setContext( InternalContextAdapter context) |
| 48 | { |
| 49 | this.context = context; |
| 50 | } |
| 51 | |
| 52 | public Object visit(SimpleNode node, Object data) |
| 53 | { |
| 54 | data = node.childrenAccept(this, data); |
| 55 | return data; |
| 56 | } |
| 57 | |
| 58 | public Object visit(ASTprocess node, Object data) |
| 59 | { |
| 60 | data = node.childrenAccept(this, data); |
| 61 | return data; |
| 62 | } |
| 63 | |
| 64 | public Object visit(ASTExpression node, Object data) |
| 65 | { |
| 66 | data = node.childrenAccept(this, data); |
| 67 | return data; |
| 68 | } |
| 69 | |
| 70 | public Object visit(ASTAssignment node, Object data) |
| 71 | { |
| 72 | data = node.childrenAccept(this, data); |
| 73 | return data; |
| 74 | } |
| 75 | |
| 76 | public Object visit(ASTOrNode node, Object data) |
| 77 | { |
| 78 | data = node.childrenAccept(this, data); |
| 79 | return data; |
| 80 | } |
| 81 | |
| 82 | public Object visit(ASTAndNode node, Object data) |
| 83 | { |
| 84 | data = node.childrenAccept(this, data); |
| 85 | return data; |
| 86 | } |
| 87 | |
| 88 | public Object visit(ASTEQNode node, Object data) |
| 89 | { |
| 90 | data = node.childrenAccept(this, data); |
| 91 | return data; |
| 92 | } |
| 93 | |
| 94 | public Object visit(ASTNENode node, Object data) |
| 95 | { |
| 96 | data = node.childrenAccept(this, data); |
| 97 | return data; |
| 98 | } |
| 99 | |
| 100 | public Object visit(ASTLTNode node, Object data) |
| 101 | { |
| 102 | data = node.childrenAccept(this, data); |
| 103 | return data; |
| 104 | } |
| 105 | |
| 106 | public Object visit(ASTGTNode node, Object data) |
| 107 | { |
| 108 | data = node.childrenAccept(this, data); |
| 109 | return data; |
| 110 | } |
| 111 | |
| 112 | public Object visit(ASTLENode node, Object data) |
| 113 | { |
| 114 | data = node.childrenAccept(this, data); |
| 115 | return data; |
| 116 | } |
| 117 | |
| 118 | public Object visit(ASTGENode node, Object data) |
| 119 | { |
| 120 | data = node.childrenAccept(this, data); |
| 121 | return data; |
| 122 | } |
| 123 | |
| 124 | public Object visit(ASTAddNode node, Object data) |
| 125 | { |
| 126 | data = node.childrenAccept(this, data); |
| 127 | return data; |
| 128 | } |
| 129 | |
| 130 | public Object visit(ASTSubtractNode node, Object data) |
| 131 | { |
| 132 | data = node.childrenAccept(this, data); |
| 133 | return data; |
| 134 | } |
| 135 | |
| 136 | public Object visit(ASTMulNode node, Object data) |
| 137 | { |
| 138 | data = node.childrenAccept(this, data); |
| 139 | return data; |
| 140 | } |
| 141 | |
| 142 | public Object visit(ASTDivNode node, Object data) |
| 143 | { |
| 144 | data = node.childrenAccept(this, data); |
| 145 | return data; |
| 146 | } |
| 147 | |
| 148 | public Object visit(ASTModNode node, Object data) |
| 149 | { |
| 150 | data = node.childrenAccept(this, data); |
| 151 | return data; |
| 152 | } |
| 153 | |
| 154 | public Object visit(ASTNotNode node, Object data) |
| 155 | { |
| 156 | data = node.childrenAccept(this, data); |
| 157 | return data; |
| 158 | } |
| 159 | |
| 160 | public Object visit(ASTNumberLiteral node, Object data) |
| 161 | { |
| 162 | data = node.childrenAccept(this, data); |
| 163 | return data; |
| 164 | } |
| 165 | |
| 166 | public Object visit(ASTStringLiteral node, Object data) |
| 167 | { |
| 168 | data = node.childrenAccept(this, data); |
| 169 | return data; |
| 170 | } |
| 171 | |
| 172 | public Object visit(ASTIdentifier node, Object data) |
| 173 | { |
| 174 | data = node.childrenAccept(this, data); |
| 175 | return data; |
| 176 | } |
| 177 | |
| 178 | public Object visit(ASTMethod node, Object data) |
| 179 | { |
| 180 | data = node.childrenAccept(this, data); |
| 181 | return data; |
| 182 | } |
| 183 | |
| 184 | public Object visit(ASTReference node, Object data) |
| 185 | { |
| 186 | data = node.childrenAccept(this, data); |
| 187 | return data; |
| 188 | } |
| 189 | |
| 190 | public Object visit(ASTTrue node, Object data) |
| 191 | { |
| 192 | data = node.childrenAccept(this, data); |
| 193 | return data; |
| 194 | } |
| 195 | |
| 196 | public Object visit(ASTFalse node, Object data) |
| 197 | { |
| 198 | data = node.childrenAccept(this, data); |
| 199 | return data; |
| 200 | } |
| 201 | |
| 202 | public Object visit(ASTBlock node, Object data) |
| 203 | { |
| 204 | data = node.childrenAccept(this, data); |
| 205 | return data; |
| 206 | } |
| 207 | |
| 208 | public Object visit(ASTText node, Object data) |
| 209 | { |
| 210 | data = node.childrenAccept(this, data); |
| 211 | return data; |
| 212 | } |
| 213 | |
| 214 | public Object visit(ASTIfStatement node, Object data) |
| 215 | { |
| 216 | data = node.childrenAccept(this, data); |
| 217 | return data; |
| 218 | } |
| 219 | |
| 220 | public Object visit(ASTElseStatement node, Object data) |
| 221 | { |
| 222 | data = node.childrenAccept(this, data); |
| 223 | return data; |
| 224 | } |
| 225 | |
| 226 | public Object visit(ASTElseIfStatement node, Object data) |
| 227 | { |
| 228 | data = node.childrenAccept(this, data); |
| 229 | return data; |
| 230 | } |
| 231 | |
| 232 | public Object visit(ASTComment node, Object data) |
| 233 | { |
| 234 | data = node.childrenAccept(this, data); |
| 235 | return data; |
| 236 | } |
| 237 | |
| 238 | public Object visit(ASTObjectArray node, Object data) |
| 239 | { |
| 240 | data = node.childrenAccept(this, data); |
| 241 | return data; |
| 242 | } |
| 243 | |
| 244 | public Object visit(ASTWord node, Object data) |
| 245 | { |
| 246 | data = node.childrenAccept(this, data); |
| 247 | return data; |
| 248 | } |
| 249 | |
| 250 | public Object visit(ASTSetDirective node, Object data) |
| 251 | { |
| 252 | data = node.childrenAccept(this, data); |
| 253 | return data; |
| 254 | } |
| 255 | |
| 256 | public Object visit(ASTDirective node, Object data) |
| 257 | { |
| 258 | data = node.childrenAccept(this, data); |
| 259 | return data; |
| 260 | } |
| 261 | } |