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17 package org.apache.logging.log4j.core.pattern;
18
19 import java.util.List;
20
21 import org.apache.logging.log4j.core.LogEvent;
22 import org.apache.logging.log4j.core.config.Configuration;
23 import org.apache.logging.log4j.core.config.plugins.Plugin;
24 import org.apache.logging.log4j.core.layout.PatternLayout;
25 import org.apache.logging.log4j.core.util.Patterns;
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30 @Plugin(name = "style", category = PatternConverter.CATEGORY)
31 @ConverterKeys({ "style" })
32 public final class StyleConverter extends LogEventPatternConverter implements AnsiConverter {
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44 public static StyleConverter newInstance(final Configuration config, final String[] options) {
45 if (options.length < 1) {
46 LOGGER.error("Incorrect number of options on style. Expected at least 1, received " + options.length);
47 return null;
48 }
49 if (options[0] == null) {
50 LOGGER.error("No pattern supplied on style");
51 return null;
52 }
53 if (options[1] == null) {
54 LOGGER.error("No style attributes provided");
55 return null;
56 }
57 final PatternParser parser = PatternLayout.createPatternParser(config);
58 final List<PatternFormatter> formatters = parser.parse(options[0]);
59 final String style = AnsiEscape.createSequence(options[1].split(Patterns.COMMA_SEPARATOR));
60 final boolean noConsoleNoAnsi = options.length > 2
61 && (PatternParser.NO_CONSOLE_NO_ANSI + "=true").equals(options[2]);
62 final boolean hideAnsi = noConsoleNoAnsi && System.console() == null;
63 return new StyleConverter(formatters, style, hideAnsi);
64 }
65
66 private final List<PatternFormatter> patternFormatters;
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68 private final boolean noAnsi;
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70 private final String style;
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72 private final String defaultStyle;
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84 private StyleConverter(final List<PatternFormatter> patternFormatters, final String style, final boolean noAnsi) {
85 super("style", "style");
86 this.patternFormatters = patternFormatters;
87 this.style = style;
88 this.defaultStyle = AnsiEscape.getDefaultStyle();
89 this.noAnsi = noAnsi;
90 }
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95 @Override
96 public void format(final LogEvent event, final StringBuilder toAppendTo) {
97 final StringBuilder buf = new StringBuilder();
98 for (final PatternFormatter formatter : patternFormatters) {
99 formatter.format(event, buf);
100 }
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102 if (buf.length() > 0) {
103 if (noAnsi) {
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105 toAppendTo.append(buf.toString());
106 } else {
107 toAppendTo.append(style).append(buf.toString()).append(defaultStyle);
108 }
109 }
110 }
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112 @Override
113 public boolean handlesThrowable() {
114 for (final PatternFormatter formatter : patternFormatters) {
115 if (formatter.handlesThrowable()) {
116 return true;
117 }
118 }
119 return false;
120 }
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127 @Override
128 public String toString() {
129 final StringBuilder sb = new StringBuilder();
130 sb.append(super.toString());
131 sb.append("[style=");
132 sb.append(style);
133 sb.append(", defaultStyle=");
134 sb.append(defaultStyle);
135 sb.append(", patternFormatters=");
136 sb.append(patternFormatters);
137 sb.append(", noAnsi=");
138 sb.append(noAnsi);
139 sb.append(']');
140 return sb.toString();
141 }
142
143 }