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1   /**
2    * Logback: the reliable, generic, fast and flexible logging framework.
3    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
4    *
5    * This program and the accompanying materials are dual-licensed under
6    * either the terms of the Eclipse Public License v1.0 as published by
7    * the Eclipse Foundation
8    *
9    *   or (per the licensee's choosing)
10   *
11   * under the terms of the GNU Lesser General Public License version 2.1
12   * as published by the Free Software Foundation.
13   */
14  package ch.qos.logback.core.joran.action;
15  
16  import org.xml.sax.Attributes;
17  
18  import ch.qos.logback.core.joran.spi.InterpretationContext;
19  import ch.qos.logback.core.joran.util.PropertySetter;
20  import ch.qos.logback.core.joran.util.beans.BeanDescriptionCache;
21  
22  public class ParamAction extends Action {
23      static String NO_NAME = "No name attribute in <param> element";
24      static String NO_VALUE = "No value attribute in <param> element";
25      boolean inError = false;
26  
27  	private final BeanDescriptionCache beanDescriptionCache;
28  	public ParamAction(BeanDescriptionCache beanDescriptionCache) {
29  		this.beanDescriptionCache=beanDescriptionCache;
30  	}
31  
32      public void begin(InterpretationContext ec, String localName, Attributes attributes) {
33          String name = attributes.getValue(NAME_ATTRIBUTE);
34          String value = attributes.getValue(VALUE_ATTRIBUTE);
35  
36          if (name == null) {
37              inError = true;
38              addError(NO_NAME);
39              return;
40          }
41  
42          if (value == null) {
43              inError = true;
44              addError(NO_VALUE);
45              return;
46          }
47  
48          // remove both leading and trailing spaces
49          value = value.trim();
50  
51          Object o = ec.peekObject();
52          PropertySetter propSetter = new PropertySetter(beanDescriptionCache,o);
53          propSetter.setContext(context);
54          value = ec.subst(value);
55  
56          // allow for variable substitution for name as well
57          name = ec.subst(name);
58  
59          // getLogger().debug(
60          // "In ParamAction setting parameter [{}] to value [{}].", name, value);
61          propSetter.setProperty(name, value);
62      }
63  
64      public void end(InterpretationContext ec, String localName) {
65      }
66  
67      public void finish(InterpretationContext ec) {
68      }
69  }