| 1 | /* |
| 2 | * Copyright 2000-2001,2004 The Apache Software Foundation. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.apache.velocity.runtime.parser.node; |
| 18 | |
| 19 | import java.io.Writer; |
| 20 | import java.io.IOException; |
| 21 | |
| 22 | import org.apache.velocity.context.InternalContextAdapter; |
| 23 | import org.apache.velocity.runtime.RuntimeServices; |
| 24 | import org.apache.velocity.runtime.exception.ReferenceException; |
| 25 | import org.apache.velocity.runtime.parser.Parser; |
| 26 | import org.apache.velocity.runtime.parser.Token; |
| 27 | |
| 28 | import org.apache.velocity.exception.MethodInvocationException; |
| 29 | import org.apache.velocity.exception.ParseErrorException; |
| 30 | import org.apache.velocity.exception.ResourceNotFoundException; |
| 31 | |
| 32 | |
| 33 | public class SimpleNode implements Node |
| 34 | { |
| 35 | protected RuntimeServices rsvc = null; |
| 36 | |
| 37 | protected Node parent; |
| 38 | protected Node[] children; |
| 39 | protected int id; |
| 40 | protected Parser parser; |
| 41 | |
| 42 | protected int info; // added |
| 43 | public boolean state; |
| 44 | protected boolean invalid = false; |
| 45 | |
| 46 | /* Added */ |
| 47 | protected Token first, last; |
| 48 | |
| 49 | public SimpleNode(int i) |
| 50 | { |
| 51 | id = i; |
| 52 | } |
| 53 | |
| 54 | public SimpleNode(Parser p, int i) |
| 55 | { |
| 56 | this(i); |
| 57 | parser = p; |
| 58 | } |
| 59 | |
| 60 | public void jjtOpen() |
| 61 | { |
| 62 | first = parser.getToken(1); // added |
| 63 | } |
| 64 | |
| 65 | public void jjtClose() |
| 66 | { |
| 67 | last = parser.getToken(0); // added |
| 68 | } |
| 69 | |
| 70 | public void setFirstToken(Token t) |
| 71 | { |
| 72 | this.first = t; |
| 73 | } |
| 74 | |
| 75 | public Token getFirstToken() |
| 76 | { |
| 77 | return first; |
| 78 | } |
| 79 | public Token getLastToken() |
| 80 | { |
| 81 | return last; |
| 82 | } |
| 83 | |
| 84 | public void jjtSetParent(Node n) |
| 85 | { |
| 86 | parent = n; |
| 87 | } |
| 88 | public Node jjtGetParent() |
| 89 | { |
| 90 | return parent; |
| 91 | } |
| 92 | |
| 93 | public void jjtAddChild(Node n, int i) |
| 94 | { |
| 95 | if (children == null) |
| 96 | { |
| 97 | children = new Node[i + 1]; |
| 98 | } |
| 99 | else if (i >= children.length) |
| 100 | { |
| 101 | Node c[] = new Node[i + 1]; |
| 102 | System.arraycopy(children, 0, c, 0, children.length); |
| 103 | children = c; |
| 104 | } |
| 105 | children[i] = n; |
| 106 | } |
| 107 | |
| 108 | public Node jjtGetChild(int i) |
| 109 | { |
| 110 | return children[i]; |
| 111 | } |
| 112 | |
| 113 | public int jjtGetNumChildren() |
| 114 | { |
| 115 | return (children == null) ? 0 : children.length; |
| 116 | } |
| 117 | |
| 118 | /** Accept the visitor. **/ |
| 119 | public Object jjtAccept(ParserVisitor visitor, Object data) |
| 120 | { |
| 121 | return visitor.visit(this, data); |
| 122 | } |
| 123 | |
| 124 | /** Accept the visitor. **/ |
| 125 | public Object childrenAccept(ParserVisitor visitor, Object data) |
| 126 | { |
| 127 | if (children != null) |
| 128 | { |
| 129 | for (int i = 0; i < children.length; ++i) |
| 130 | { |
| 131 | children[i].jjtAccept(visitor, data); |
| 132 | } |
| 133 | } |
| 134 | return data; |
| 135 | } |
| 136 | |
| 137 | /* You can override these two methods in subclasses of SimpleNode to |
| 138 | customize the way the node appears when the tree is dumped. If |
| 139 | your output uses more than one line you should override |
| 140 | toString(String), otherwise overriding toString() is probably all |
| 141 | you need to do. */ |
| 142 | |
| 143 | // public String toString() |
| 144 | // { |
| 145 | // return ParserTreeConstants.jjtNodeName[id]; |
| 146 | // } |
| 147 | public String toString(String prefix) |
| 148 | { |
| 149 | return prefix + toString(); |
| 150 | } |
| 151 | |
| 152 | /* Override this method if you want to customize how the node dumps |
| 153 | out its children. */ |
| 154 | |
| 155 | public void dump(String prefix) |
| 156 | { |
| 157 | System.out.println(toString(prefix)); |
| 158 | if (children != null) |
| 159 | { |
| 160 | for (int i = 0; i < children.length; ++i) |
| 161 | { |
| 162 | SimpleNode n = (SimpleNode) children[i]; |
| 163 | if (n != null) |
| 164 | { |
| 165 | n.dump(prefix + " "); |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | // All additional methods |
| 172 | |
| 173 | public String literal() |
| 174 | { |
| 175 | Token t = first; |
| 176 | StringBuffer sb = new StringBuffer(t.image); |
| 177 | |
| 178 | while (t != last) |
| 179 | { |
| 180 | t = t.next; |
| 181 | sb.append(t.image); |
| 182 | } |
| 183 | |
| 184 | return sb.toString(); |
| 185 | } |
| 186 | |
| 187 | public Object init( InternalContextAdapter context, Object data) throws Exception |
| 188 | { |
| 189 | /* |
| 190 | * hold onto the RuntimeServices |
| 191 | */ |
| 192 | |
| 193 | rsvc = (RuntimeServices) data; |
| 194 | |
| 195 | int i, k = jjtGetNumChildren(); |
| 196 | |
| 197 | for (i = 0; i < k; i++) |
| 198 | { |
| 199 | try |
| 200 | { |
| 201 | jjtGetChild(i).init( context, data); |
| 202 | } |
| 203 | catch (ReferenceException re) |
| 204 | { |
| 205 | rsvc.error(re); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | return data; |
| 210 | } |
| 211 | |
| 212 | public boolean evaluate( InternalContextAdapter context) |
| 213 | throws MethodInvocationException |
| 214 | { |
| 215 | return false; |
| 216 | } |
| 217 | |
| 218 | public Object value( InternalContextAdapter context) |
| 219 | throws MethodInvocationException |
| 220 | { |
| 221 | return null; |
| 222 | } |
| 223 | |
| 224 | public boolean render( InternalContextAdapter context, Writer writer) |
| 225 | throws IOException, MethodInvocationException, ParseErrorException, ResourceNotFoundException |
| 226 | { |
| 227 | int i, k = jjtGetNumChildren(); |
| 228 | |
| 229 | for (i = 0; i < k; i++) |
| 230 | jjtGetChild(i).render(context, writer); |
| 231 | |
| 232 | return true; |
| 233 | } |
| 234 | |
| 235 | public Object execute(Object o, InternalContextAdapter context) |
| 236 | throws MethodInvocationException |
| 237 | { |
| 238 | return null; |
| 239 | } |
| 240 | |
| 241 | public int getType() |
| 242 | { |
| 243 | return id; |
| 244 | } |
| 245 | |
| 246 | public void setInfo(int info) |
| 247 | { |
| 248 | this.info = info; |
| 249 | } |
| 250 | |
| 251 | public int getInfo() |
| 252 | { |
| 253 | return info; |
| 254 | } |
| 255 | |
| 256 | public void setInvalid() |
| 257 | { |
| 258 | invalid = true; |
| 259 | } |
| 260 | |
| 261 | public boolean isInvalid() |
| 262 | { |
| 263 | return invalid; |
| 264 | } |
| 265 | |
| 266 | public int getLine() |
| 267 | { |
| 268 | return first.beginLine; |
| 269 | } |
| 270 | |
| 271 | public int getColumn() |
| 272 | { |
| 273 | return first.beginColumn; |
| 274 | } |
| 275 | } |
| 276 | |