01: /* Copyright (c) 2006-2007, Vladimir Nikic
02: All rights reserved.
03:
04: Redistribution and use of this software in source and binary forms,
05: with or without modification, are permitted provided that the following
06: conditions are met:
07:
08: * Redistributions of source code must retain the above
09: copyright notice, this list of conditions and the
10: following disclaimer.
11:
12: * Redistributions in binary form must reproduce the above
13: copyright notice, this list of conditions and the
14: following disclaimer in the documentation and/or other
15: materials provided with the distribution.
16:
17: * The name of Web-Harvest may not be used to endorse or promote
18: products derived from this software without specific prior
19: written permission.
20:
21: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31: POSSIBILITY OF SUCH DAMAGE.
32:
33: You can contact Vladimir Nikic by sending e-mail to
34: nikic_vladimir@yahoo.com. Please include the word "Web-Harvest" in the
35: subject line.
36: */
37: package org.webharvest.runtime.processors;
38:
39: import org.webharvest.definition.VarDef;
40: import org.webharvest.exception.VariableException;
41: import org.webharvest.runtime.Scraper;
42: import org.webharvest.runtime.ScraperContext;
43: import org.webharvest.runtime.templaters.BaseTemplater;
44: import org.webharvest.runtime.variables.IVariable;
45:
46: /**
47: * Variable definition read processor.
48: */
49: public class VarProcessor extends BaseProcessor {
50:
51: private VarDef varDef;
52:
53: public VarProcessor(VarDef varDef) {
54: super (varDef);
55: this .varDef = varDef;
56: }
57:
58: public IVariable execute(Scraper scraper, ScraperContext context) {
59: String name = BaseTemplater.execute(varDef.getName(), scraper
60: .getScriptEngine());
61:
62: IVariable var = context.getVar(name);
63:
64: if (var == null) {
65: throw new VariableException("Variable '" + name
66: + "' is not defined!");
67: }
68:
69: return var;
70: }
71:
72: }
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