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1 package org.apache.slide.projector.processor.table;
2
3 import java.util.Map  ;
4
5 import org.apache.slide.projector.ConfigurationException;
6 import org.apache.slide.projector.Context;
7 import org.apache.slide.projector.ProcessException;
8 import org.apache.slide.projector.Result;
9 import org.apache.slide.projector.descriptor.NumberValueDescriptor;
10 import org.apache.slide.projector.descriptor.ParameterDescriptor;
11 import org.apache.slide.projector.i18n.ErrorMessage;
12 import org.apache.slide.projector.i18n.ParameterMessage;
13 import org.apache.slide.projector.processor.TemplateArrayRenderer;
14 import org.apache.slide.projector.value.NumberValue;
15 import org.apache.slide.projector.value.StreamableValue;
16 import org.apache.slide.projector.value.StringValue;
17
18 public class TableArrayRenderer extends TemplateArrayRenderer {
19 final private static String HEADER_FRAGMENT = "header";
20 final private static String FOOTER_FRAGMENT = "footer";
21 final private static String FIRST_FRAGMENT = "first";
22 final private static String LAST_FRAGMENT = "last";
23 final private static String EVEN_FRAGMENT = "even";
24 final private static String DEFAULT_FRAGMENT = "default";
25 final private static String EMPTY_FRAGMENT = "empty";
26
27 final private static String OFFSET = "offset";
28 final private static String LENGTH = "length";
29
30 private Template headerTemplate;
31 private Template footerTemplate;
32 private Template firstTemplate;
33 private Template lastTemplate;
34 private Template evenTemplate;
35 private Template defaultTemplate;
36 private Template emptyTemplate;
37
38 private ParameterDescriptor []parameterDescriptors;
39
40 public TableArrayRenderer() {
41 setRequiredFragments(new String [] { DEFAULT_FRAGMENT });
42 setOptionalFragments(new String [] { EMPTY_FRAGMENT, HEADER_FRAGMENT, FOOTER_FRAGMENT, FIRST_FRAGMENT, LAST_FRAGMENT, EVEN_FRAGMENT });
43 }
44
45 public void configure(StreamableValue config) throws ConfigurationException {
46 super.configure(config);
47 ParameterDescriptor []parentParameterDescriptors = super.getParameterDescriptors();
48 parameterDescriptors = new ParameterDescriptor[parentParameterDescriptors.length+1];
50 int index = 0;
51 for ( int i = 0; i < parentParameterDescriptors.length; i++ ) {
52 ParameterDescriptor descriptor = parentParameterDescriptors[i];
53 if ( descriptor.getName() != FRAGMENT ) {
54 parameterDescriptors[index] = parentParameterDescriptors[i];
55 index++;
56 }
57 }
58 parameterDescriptors[parentParameterDescriptors.length-1] = new ParameterDescriptor(OFFSET, new ParameterMessage("tableRenderer/offset"), new NumberValueDescriptor(), new NumberValue(new Integer (0)));
59 parameterDescriptors[parentParameterDescriptors.length] = new ParameterDescriptor(LENGTH, new ParameterMessage("tableRenderer/length"), new NumberValueDescriptor(), new NumberValue(new Integer (0)));
60
61 headerTemplate = getOptionalFragment(HEADER_FRAGMENT);
62 footerTemplate = getOptionalFragment(FOOTER_FRAGMENT);
63 firstTemplate = getOptionalFragment(FIRST_FRAGMENT);
64 lastTemplate = getOptionalFragment(LAST_FRAGMENT);
65 evenTemplate = getOptionalFragment(EVEN_FRAGMENT);
66 emptyTemplate = getOptionalFragment(EMPTY_FRAGMENT);
67 try {
68 defaultTemplate = getRequiredFragment(DEFAULT_FRAGMENT);
69 } catch ( ProcessException exception ) {
70 throw new ConfigurationException(new ErrorMessage("tableRenderer/fragmentsMissing"), exception);
71 }
72 }
73
74 public Result process(Map parameter, Context context) throws Exception {
75 StringBuffer buffer = new StringBuffer (1024);
76 int offset = ((NumberValue)parameter.get(OFFSET)).getNumber().intValue();
77 int length = ((NumberValue)parameter.get(LENGTH)).getNumber().intValue();
78 parameter.remove(OFFSET);
79 parameter.remove(LENGTH);
80 int maxIndex = getMaxIndex(parameter);
81 offset = Math.min(offset, maxIndex);
82 if ( length > 0 ) {
83 length = Math.min(length, maxIndex-offset);
84 } else {
85 length = maxIndex-offset;
86 }
87 if ( maxIndex == 0 ) {
88 emptyTemplate.evaluate(buffer, parameter);
89 } else {
90 if ( headerTemplate != null ) headerTemplate.evaluate(buffer, parameter);
91 for ( int i = 0; i < length; i++ ) {
92 if ( i == 0 && firstTemplate != null ) {
93 firstTemplate.evaluate(buffer, parameter, i+offset);
94 } else if ( i == length -1 && lastTemplate != null ) {
95 lastTemplate.evaluate(buffer, parameter, i+offset);
96 } else if ( evenTemplate != null && i%2 == 0 ) {
97 evenTemplate.evaluate(buffer, parameter, i+offset);
98 } else {
99 defaultTemplate.evaluate(buffer, parameter, i+offset);
100 }
101 }
102 if ( footerTemplate != null ) footerTemplate.evaluate(buffer, parameter);
103 }
104 return new Result(OK, OUTPUT, new StringValue(buffer.toString(), defaultTemplate.getContentType(), false ));
105 }
106
107 public ParameterDescriptor[] getParameterDescriptors() {
108 return parameterDescriptors;
109 }
110 } |
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