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| 190 | + * Copyright 2014 Edgar Espina |
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| 203 | + */ |
| 204 | +package org.jooby.internal; |
| 205 | + |
| 206 | +import java.util.Optional; |
| 207 | +import java.util.function.Predicate; |
| 208 | + |
| 209 | +public class SourceProvider { |
| 210 | + private static final Predicate<String> JOOBY_PKG = pkg("org.jooby"); |
| 211 | + private static final Predicate<String> JAVALANG_PKG = pkg("javaslang"); |
| 212 | + private static final Predicate<String> GOOGLE_PKG = pkg("com.google"); |
| 213 | + private static final Predicate<String> SUN_PKG = pkg("sun.").or(pkg("com.sun")); |
| 214 | + private static final Predicate<String> JAVA_PKG = pkg("java."); |
| 215 | + private static final Predicate<String> SKIP = JOOBY_PKG.or(GOOGLE_PKG).or(JAVALANG_PKG) |
| 216 | + .or(SUN_PKG).or(JAVA_PKG); |
| 217 | + |
| 218 | + public static final SourceProvider INSTANCE = new SourceProvider(SKIP); |
| 219 | + |
| 220 | + private final Predicate<String> skip; |
| 221 | + |
| 222 | + private SourceProvider(Predicate<String> skip) { |
| 223 | + this.skip = skip; |
| 224 | + } |
| 225 | + |
| 226 | + public Optional<StackTraceElement> get() { |
| 227 | + return get(new Throwable().getStackTrace()); |
| 228 | + } |
| 229 | + |
| 230 | + public Optional<StackTraceElement> get(StackTraceElement[] elements) { |
| 231 | + for (StackTraceElement element : elements) { |
| 232 | + String className = element.getClassName(); |
| 233 | + |
| 234 | + if (!skip.test(className)) { |
| 235 | + int innerStart = className.indexOf('$'); |
| 236 | + if (innerStart > 0) { |
| 237 | + return Optional.of(new StackTraceElement(className.substring(0, innerStart), |
| 238 | + element.getMethodName(), element.getFileName(), element.getLineNumber())); |
| 239 | + } |
| 240 | + return Optional.of(element); |
| 241 | + } |
| 242 | + } |
| 243 | + return Optional.empty(); |
| 244 | + } |
| 245 | + |
| 246 | + private static Predicate<String> pkg(String pkg) { |
| 247 | + return classname -> classname.startsWith(pkg); |
| 248 | + } |
| 249 | +} |
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