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1
16 package org.apache.cocoon.components.language.markup.xsp;
17
18 import java.io.File  ;
19 import java.io.FileInputStream ;
20 import java.io.IOException ;
21 import java.util.Map ;
22 import java.util.Properties ;
23
24 import org.apache.avalon.framework.activity.Initializable;
25 import org.apache.avalon.framework.configuration.Configurable;
26 import org.apache.avalon.framework.configuration.Configuration;
27 import org.apache.avalon.framework.configuration.ConfigurationException;
28 import org.apache.avalon.framework.parameters.Parameters;
29
30 import org.apache.cocoon.Constants;
31 import org.apache.cocoon.ProcessingException;
32 import org.apache.cocoon.environment.SourceResolver;
33
34 import org.python.core.Py;
35 import org.python.core.PyCode;
36 import org.python.util.PythonInterpreter;
37 import org.xml.sax.SAXException ;
38 import org.xml.sax.helpers.AttributesImpl ;
39
40
48 public class PythonGenerator extends XSPGenerator
49 implements Configurable, Initializable {
50
51
54 private File file;
55
56 private PythonInterpreter python;
57
58 private PyCode code;
59 private Exception compileError;
60
61
62 public void configure(Configuration configuration) throws ConfigurationException {
63 this.file = new File (configuration.getChild("file").getValue());
64
65 Configuration[] dependencies = configuration.getChildren("dependency");
66 this.dependencies = new File [dependencies.length];
67 for (int i = 0; i < dependencies.length; i ++) {
68 this.dependencies[i] = new File (dependencies[i].getValue());
69 }
70 }
71
72
78 public boolean modifiedSince(long date) {
79 if (this.file.lastModified() < date) {
80 return true;
81 }
82
83 for (int i = 0; i < dependencies.length; i++) {
84 if (this.file.lastModified() < dependencies[i].lastModified()) {
85 return true;
86 }
87 }
88
89 return false;
90 }
91
92 public void initialize() throws Exception {
93 try {
94 Properties properties = new Properties ();
95 File workDir = (File )avalonContext.get(Constants.CONTEXT_WORK_DIR);
96 properties.setProperty("python.home", workDir.toString());
97 properties.setProperty("python.packages.fakepath",
98 (String )avalonContext.get(Constants.CONTEXT_CLASSPATH));
99 PythonInterpreter.initialize(System.getProperties(), properties, new String []{});
100
101 python = new PythonInterpreter();
102 python.set("page", this);
103 python.set("logger", getLogger());
104 python.set("xspAttr", new AttributesImpl ());
105
106 if (getLogger().isDebugEnabled()) {
107 getLogger().debug("Compiling script " + file);
108 }
109
110 this.code = Py.compile(new FileInputStream (this.file),
111 this.file.toString(),
112 "exec");
113 } catch (Exception e) {
114 this.compileError = e;
115 }
116 }
117
118
119 public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par)
120 throws ProcessingException, SAXException , IOException {
121 super.setup(resolver, objectModel, src, par);
122
123 if (this.compileError != null) {
124 throw new ProcessingException("Failed to compile script", compileError);
125 }
126
127 python.set("objectModel", this.objectModel);
128 python.set("request", this.request);
129 python.set("response", this.response);
130 python.set("context", this.context);
131 python.set("resolver", this.resolver);
132 python.set("parameters", this.parameters);
133 }
134
135 public void generate() throws IOException , ProcessingException {
136 try {
137 python.set("contentHandler", this.contentHandler);
138
139 if (getLogger().isDebugEnabled()) {
140 getLogger().debug("Executing script " + file);
141 }
142 python.exec(code);
143 } catch (Exception e) {
144 throw new ProcessingException("generate: Got Python exception", e);
145 }
146 }
147
148 public void recycle() {
149 python.set("contentHandler", null);
150
151 python.set("objectModel", null);
152 python.set("request", null);
153 python.set("response", null);
154 python.set("context", null);
155 python.set("resolver", null);
156 python.set("parameters", null);
157
158 super.recycle();
159 }
160
161 public void dispose() {
162 python.set("page", null);
163 python.set("logger", null);
164 python.set("xspAttr", null);
165
166 this.python = null;
167 this.compileError = null;
168 this.code = null;
169
170 super.dispose();
171 }
172 }
173 |
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