com.fasterxml.jackson.databind.ext.NioPathDeserializer Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
package com.fasterxml.jackson.databind.ext;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.FileSystemNotFoundException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.spi.FileSystemProvider;
import java.util.ServiceLoader;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer;
import static java.lang.Character.isLetter;
/**
* @since 2.8
*/
public class NioPathDeserializer extends StdScalarDeserializer
{
private static final long serialVersionUID = 1;
private static final boolean areWindowsFilePathsSupported;
static {
boolean isWindowsRootFound = false;
for (File file : File.listRoots()) {
String path = file.getPath();
if (path.length() >= 2 && isLetter(path.charAt(0)) && path.charAt(1) == ':') {
isWindowsRootFound = true;
break;
}
}
areWindowsFilePathsSupported = isWindowsRootFound;
}
public NioPathDeserializer() { super(Path.class); }
@Override
public Path deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
if (!p.hasToken(JsonToken.VALUE_STRING)) {
return (Path) ctxt.handleUnexpectedToken(Path.class, p);
}
final String value = p.getText();
// If someone gives us an input with no : at all, treat as local path, instead of failing
// with invalid URI.
if (value.indexOf(':') < 0) {
return Paths.get(value);
}
if (areWindowsFilePathsSupported) {
if (value.length() >= 2 && isLetter(value.charAt(0)) && value.charAt(1) == ':') {
return Paths.get(value);
}
}
final URI uri;
try {
uri = new URI(value);
} catch (URISyntaxException e) {
return (Path) ctxt.handleInstantiationProblem(handledType(), value, e);
}
try {
return Paths.get(uri);
} catch (FileSystemNotFoundException cause) {
try {
final String scheme = uri.getScheme();
// We want to use the current thread's context class loader, not system class loader that is used in Paths.get():
for (FileSystemProvider provider : ServiceLoader.load(FileSystemProvider.class)) {
if (provider.getScheme().equalsIgnoreCase(scheme)) {
return provider.getPath(uri);
}
}
return (Path) ctxt.handleInstantiationProblem(handledType(), value, cause);
} catch (Throwable e) {
e.addSuppressed(cause);
return (Path) ctxt.handleInstantiationProblem(handledType(), value, e);
}
} catch (Throwable e) {
return (Path) ctxt.handleInstantiationProblem(handledType(), value, e);
}
}
}
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