Merge pull request #117 from FasterXML/tatu/2.17/116-support-path-type

Fix #116: add read/write support for `java.nio.file.Path`

Author: cowtowncoder

jr-objects/src/main/java/com/fasterxml/jackson/jr/ob/impl/JSONWriter.java

@@ -3,6 +3,7 @@
 import java.io.*;
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.nio.file.Path;
 import java.util.*;
 
 import com.fasterxml.jackson.core.*;
@@ -266,6 +267,9 @@ public void writeField(String fieldName, Object value, int type) throws IOExcept
         case SER_URI:
             writeStringLikeField(fieldName, value.toString(), type);
             return;
+        case SER_PATH:
+            writeStringLikeField(fieldName, ((Path) value).toUri().toString(), type);
+            return;
 
         // Others
 
@@ -393,6 +397,9 @@ protected void _writeValue(Object value, int type) throws IOException
         case SER_URI:
             writeStringLikeValue(value.toString(), type);
             return;
+        case SER_PATH:
+            writeStringLikeValue(((Path) value).toUri().toString(), type);
+            return;
 
         case SER_ITERABLE:
             writeIterableValue((Iterable<?>) value);

jr-objects/src/main/java/com/fasterxml/jackson/jr/ob/impl/SimpleValueReader.java

@@ -6,6 +6,7 @@
 import java.io.IOException;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Paths;
 import java.util.*;
 
 import com.fasterxml.jackson.core.JsonParser;
@@ -212,7 +213,7 @@ public Object read(JSONReader reader, JsonParser p) throws IOException
             try {
                 return Class.forName(v);
             } catch (Exception e) {
-                throw new JSONObjectException("Failed to bind java.lang.Class from value '"+v+"'");
+                throw new JSONObjectException("Failed to bind `java.lang.Class` from value '"+v+"'");
             }
         }
         case SER_FILE:
@@ -239,6 +240,16 @@ public Object read(JSONReader reader, JsonParser p) throws IOException
                 return null;
             }
             return URI.create(p.getValueAsString());
+        case SER_PATH:
+            if (p.hasToken(JsonToken.VALUE_NULL)) {
+                return null;
+            }
+            String v = p.getValueAsString();
+            try {
+                return Paths.get(new URI(v));
+            } catch (Exception e) {
+                throw new JSONObjectException("Failed to bind `java.nio.file.Path` from value '"+v+"'");
+            }
 
 //        case SER_MAP:
 //        case SER_LIST:

jr-objects/src/main/java/com/fasterxml/jackson/jr/ob/impl/ValueLocatorBase.java

@@ -5,6 +5,7 @@
 import java.math.BigInteger;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Path;
 import java.util.*;
 
 import com.fasterxml.jackson.core.TreeNode;
@@ -111,15 +112,15 @@ public abstract class ValueLocatorBase
     public final static int SER_UUID = 33;
     public final static int SER_URL = 34;
     public final static int SER_URI = 35;
-
+    public final static int SER_PATH = 36; // since 2.17
 
     // // // Iterate-able types
 
     /**
      * Anything that implements {@link java.lang.Iterable}, but not
      * {@link java.util.Collection}.
      */
-    public final static int SER_ITERABLE = 36;
+    public final static int SER_ITERABLE = 37;
 
     /*
     /**********************************************************************
@@ -236,6 +237,9 @@ protected int _findSimpleType(Class<?> raw, boolean forSer)
         if (UUID.class.isAssignableFrom(raw)) {
             return SER_UUID;
         }
+        if (Path.class.isAssignableFrom(raw)) {
+            return SER_PATH;
+        }
         // May or may not help with deser, but recognized nonetheless;
         // on assumption that Beans should rarely implement `CharSequence`
         if (CharSequence.class.isAssignableFrom(raw)) {

jr-objects/src/test/java/com/fasterxml/jackson/jr/ob/ReadSimpleTest.java

@@ -5,6 +5,8 @@
 import java.io.File;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.*;
 
 import com.fasterxml.jackson.core.JsonParser;
@@ -177,6 +179,17 @@ public void testMiscScalars() throws Exception {
         assertEquals(Object.class, JSON.std.beanFrom(Class.class, q(Object.class.getName())));
     }
 
+    public void testMiscUriTypes() throws Exception
+    {
+        final String URL_STR = "http://fasterxml.com";
+        final URL url = new URL(URL_STR);
+        assertEquals(url, JSON.std.beanFrom(URL.class, q(URL_STR)));
+
+        Path p = Paths.get(new URI("file:///foo/bar.txt"));
+        assertEquals(p,
+                JSON.std.beanFrom(Path.class, q("file:///foo/bar.txt")));
+    }
+    
     public void testMiscScalarFail() throws Exception {
         for (String input : new String[] { " false ",  "true", "[ ]", "{ }" } ) {
             try {

jr-objects/src/test/java/com/fasterxml/jackson/jr/ob/WriteSimpleTest.java

@@ -5,6 +5,8 @@
 import java.io.StringWriter;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.*;
 
 import com.fasterxml.jackson.jr.ob.JSON.Feature;
@@ -103,12 +105,15 @@ public void testNest() throws Exception
     public void testKnownSimpleTypes() throws Exception
     {
         final String URL_STR = "http://fasterxml.com";
-        assertEquals(q(URL_STR),
-                JSON.std.asString(new URI(URL_STR)));
+        final URI uri = new URI(URL_STR);
+        assertEquals(q(URL_STR), JSON.std.asString(uri));
         final String PATH = "/foo/bar.txt";
         assertEquals(q(PATH),
                 JSON.std.asString(new File(PATH)));
 
+        Path p = Paths.get(new URI("file:///foo/bar.txt"));
+        assertEquals(q("file:///foo/bar.txt"), JSON.std.asString(p));
+
         assertEquals(q("B"), JSON.std.asString(ABC.B));
         assertEquals("1", JSON.std.with(Feature.WRITE_ENUMS_USING_INDEX).asString(ABC.B));
     }

release-notes/VERSION-2.x

@@ -18,6 +18,7 @@ Modules:
 #112: `overrideStandardValueWriter` only applied to first `java.nio.file.Path`
   valued field of bean
  (reported by Julian H)
+#116: Add read/write support for `java.nio.file.Path`
 
 2.16.1 (24-Dec-2023)