in src/main/java/org/apache/maven/shared/jar/JarData.java [82:97]
public JarData(File file, Manifest manifest, List<JarEntry> entries) {
this.file = file;
this.manifest = manifest;
this.entries = Collections.unmodifiableList(entries);
boolean aSealed = false;
if (this.manifest != null) {
String sval = this.manifest.getMainAttributes().getValue(Attributes.Name.SEALED);
if (sval != null && !sval.isEmpty()) {
aSealed = "true".equalsIgnoreCase(sval.trim());
}
}
this.aSealed = aSealed;
}