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1
37 package org.webharvest.definition;
38
39 import java.util.*;
40
41 import org.webharvest.exception.ConfigurationException;
42 import org.webharvest.exception.ErrMsg;
43
44 public class DefinitionResolver {
45
46 public static IElementDef createElementDefinition(XmlNode node) {
47 IElementDef result;
48
49 String  nodeName = node.getName();
50
51 if (nodeName.equalsIgnoreCase("empty")) {
52 validate(node, null, "id");
53 result = new EmptyDef(node);
54 } else if (nodeName.equalsIgnoreCase("text")) {
55 validate(node, null, "id");
56 result = new TextDef(node);
57 } else if (nodeName.equalsIgnoreCase("file")) {
58 validate(node, null, "id,!path,action,type,charset");
59 result = new FileDef(node);
60 } else if (nodeName.equalsIgnoreCase("var-def")) {
61 validate(node, null, "id,!name");
62 result = new VarDefDef(node);
63 } else if (nodeName.equalsIgnoreCase("var")) {
64 validate(node, "", "id,!name");
65 result = new VarDef(node);
66 } else if (nodeName.equalsIgnoreCase("http")) {
67 validate(node, null, "id,!url,method,charset,username,password");
68 result = new HttpDef(node);
69 } else if (nodeName.equalsIgnoreCase("http-param")) {
70 validate(node, null, "id,!name");
71 result = new HttpParamDef(node);
72 } else if (nodeName.equalsIgnoreCase("http-header")) {
73 validate(node, null, "id,!name");
74 result = new HttpHeaderDef(node);
75 } else if (nodeName.equalsIgnoreCase("html-to-xml")) {
76 validate(node, null, "id");
77 result = new HtmlToXmlDef(node);
78 } else if (nodeName.equalsIgnoreCase("regexp")) {
79 validate(node, "!regexp-pattern,!regexp-source,regexp-result", "id,replace,max");
80 result = new RegexpDef(node);
81 } else if (nodeName.equalsIgnoreCase("xpath")) {
82 validate(node, null, "id,!expression");
83 result = new XPathDef(node);
84 } else if (nodeName.equalsIgnoreCase("xquery")) {
85 validate(node, "xq-param,!xq-expression", "id");
86 result = new XQueryDef(node);
87 } else if (nodeName.equalsIgnoreCase("xslt")) {
88 validate(node, "!xml,!stylesheet", "id");
89 result = new XsltDef(node);
90 } else if (nodeName.equalsIgnoreCase("template")) {
91 validate(node, null, "id");
92 result = new TemplateDef(node);
93 } else if (nodeName.equalsIgnoreCase("case")) {
94 validate(node, "!if,else", "id");
95 result = new CaseDef(node);
96 } else if (nodeName.equalsIgnoreCase("loop")) {
97 validate(node, "!list,!body", "id,item,index,maxloops,filter");
98 result = new LoopDef(node);
99 } else if (nodeName.equalsIgnoreCase("while")) {
100 validate(node, null, "id,!condition,index,maxloops");
101 result = new WhileDef(node);
102 } else if (nodeName.equalsIgnoreCase("function")) {
103 validate(node, null, "id,!name");
104 result = new FunctionDef(node);
105 } else if (nodeName.equalsIgnoreCase("return")) {
106 validate(node, null, "id");
107 result = new ReturnDef(node);
108 } else if (nodeName.equalsIgnoreCase("call")) {
109 validate(node, null, "id,!name");
110 result = new CallDef(node);
111 } else if (nodeName.equalsIgnoreCase("call-param")) {
112 validate(node, null, "id,!name");
113 result = new CallParamDef(node);
114 } else if (nodeName.equalsIgnoreCase("include")) {
115 validate(node, "", "id,!path");
116 result = new IncludeDef(node);
117 } else if (nodeName.equalsIgnoreCase("try")) {
118 validate(node, "!body,!catch", "id");
119 result = new TryDef(node);
120 } else if (nodeName.equalsIgnoreCase("script")) {
121 validate(node, null, "id");
122 result = new ScriptDef(node);
123 } else {
124 throw new ConfigurationException("Unexpected configuration element: " + nodeName + "!");
125 }
126
127 return result;
128 }
129
130 public static void validate(XmlNode node, String validTags, String validAtts) {
131 if (node == null) {
132 return;
133 }
134
135 if (validTags != null) {
137 Set validTagsSet = new HashSet();
138
139 StringTokenizer tokenizer = new StringTokenizer(validTags, ",");
141 while (tokenizer.hasMoreTokens()) {
142 String token = tokenizer.nextToken().toLowerCase();
143 if (token.startsWith("!")) {
144 String tagName = token.substring(1);
145 if ( node.getElement(tagName) == null ) {
146 throw new ConfigurationException( ErrMsg.missingTag(node.getName(), tagName) );
147 }
148 validTagsSet.add(tagName);
149 } else {
150 validTagsSet.add(token);
151 }
152 }
153
154 Iterator it = node.keySet().iterator();
156 while (it.hasNext()) {
157 String tagName = ((String ) it.next()).toLowerCase();
158 if (!validTagsSet.contains(tagName)) {
159 throw new ConfigurationException( ErrMsg.invalidTag(node.getName(), tagName) );
160 }
161 }
162 }
163
164 if (validAtts != null) {
166 Set validAttsSet = new HashSet();
167
168 StringTokenizer tokenizer = new StringTokenizer(validAtts, ",");
170 while (tokenizer.hasMoreTokens()) {
171 String token = tokenizer.nextToken().toLowerCase();
172 if (token.startsWith("!")) {
173 String attName = token.substring(1);
174 if ( node.getAttribute(attName) == null ) {
175 throw new ConfigurationException( ErrMsg.missingAttribute(node.getName(), attName) );
176 }
177 validAttsSet.add(attName);
178 } else {
179 validAttsSet.add(token);
180 }
181 }
182
183 Map attributes = node.getAttributes();
185 if (attributes != null) {
186 Iterator it = attributes.keySet().iterator();
187 while (it.hasNext()) {
188 String attName = ((String ) it.next()).toLowerCase();
189 if (!validAttsSet.contains(attName)) {
190 throw new ConfigurationException( ErrMsg.invalidAttribute(node.getName(), attName) );
191 }
192 }
193 }
194 }
195 }
196
197 } |
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