Added type conversion support

src/main/java/org/json/XML.java

@@ -26,10 +26,12 @@ of this software and associated documentation files (the "Software"), to deal
 
 import java.io.Reader;
 import java.io.StringReader;
+import java.lang.reflect.Method;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.util.Iterator;
 
+
 /**
  * This provides static methods to convert an XML text into a JSONObject, and to
  * covert a JSONObject into an XML text.
@@ -72,6 +74,8 @@ public class XML {
      */
     public static final String NULL_ATTR = "xsi:nil";
 
+    public static final String TYPE_ATTR = "xsi:type";
+
     /**
      * Creates an iterator for navigating Code Points in a string instead of
      * characters. Once Java7 support is dropped, this can be replaced with
@@ -257,6 +261,7 @@ private static boolean parse(XMLTokener x, JSONObject context, String name, XMLP
         String string;
         String tagName;
         Object token;
+        XMLXsiTypeConverter<?> xmlXsiTypeConverter;
 
         // Test for and skip past these forms:
         // <!-- ... -->
@@ -336,6 +341,7 @@ private static boolean parse(XMLTokener x, JSONObject context, String name, XMLP
             token = null;
             jsonObject = new JSONObject();
             boolean nilAttributeFound = false;
+            xmlXsiTypeConverter = null;
             for (;;) {
                 if (token == null) {
                     token = x.nextToken();
@@ -354,6 +360,9 @@ private static boolean parse(XMLTokener x, JSONObject context, String name, XMLP
                                 && NULL_ATTR.equals(string)
                                 && Boolean.parseBoolean((String) token)) {
                             nilAttributeFound = true;
+                        } else if(config.getXsiTypeMap() != null && !config.getXsiTypeMap().isEmpty()
+                                && TYPE_ATTR.equals(string)) {
+                            xmlXsiTypeConverter = config.getXsiTypeMap().get(token);
                         } else if (!nilAttributeFound) {
                             jsonObject.accumulate(string,
                                     config.isKeepStrings()
@@ -392,8 +401,13 @@ private static boolean parse(XMLTokener x, JSONObject context, String name, XMLP
                         } else if (token instanceof String) {
                             string = (String) token;
                             if (string.length() > 0) {
-                                jsonObject.accumulate(config.getcDataTagName(),
-                                        config.isKeepStrings() ? string : stringToValue(string));
+                                if(xmlXsiTypeConverter != null) {
+                                    jsonObject.accumulate(config.getcDataTagName(),
+                                            stringToValue(string, xmlXsiTypeConverter));
+                                } else {
+                                    jsonObject.accumulate(config.getcDataTagName(),
+                                            config.isKeepStrings() ? string : stringToValue(string));
+                                }
                             }
 
                         } else if (token == LT) {
@@ -418,6 +432,19 @@ private static boolean parse(XMLTokener x, JSONObject context, String name, XMLP
         }
     }
 
+    /**
+     * This method tries to convert the given string value to the target object
+     * @param string String to convert
+     * @param typeConverter value converter to convert string to integer, boolean e.t.c
+     * @return JSON value of this string or the string
+     */
+    public static Object stringToValue(String string, XMLXsiTypeConverter<?> typeConverter) {
+        if(typeConverter != null) {
+            return typeConverter.convert(string);
+        }
+        return stringToValue(string);
+    }
+
     /**
      * This method is the same as {@link JSONObject#stringToValue(String)}.
      *

src/main/java/org/json/XMLParserConfiguration.java

@@ -23,6 +23,11 @@ of this software and associated documentation files (the "Software"), to deal
 SOFTWARE.
 */
 
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+
 /**
  * Configuration object for the XML parser. The configuration is immutable.
  * @author AylwardJ
@@ -56,6 +61,11 @@ public class XMLParserConfiguration {
      */
     private boolean convertNilAttributeToNull;
 
+    /**
+     * This will allow type conversion for values in XML if xsi:type attribute is defined
+     */
+    private Map<String, XMLXsiTypeConverter<?>> xsiTypeMap;
+
     /**
      * Default parser configuration. Does not keep strings (tries to implicitly convert
      * values), and the CDATA Tag Name is "content".
@@ -64,6 +74,7 @@ public XMLParserConfiguration () {
         this.keepStrings = false;
         this.cDataTagName = "content";
         this.convertNilAttributeToNull = false;
+        this.xsiTypeMap = Collections.emptyMap();
     }
 
     /**
@@ -129,7 +140,26 @@ public XMLParserConfiguration (final boolean keepStrings, final String cDataTagN
         this.cDataTagName = cDataTagName;
         this.convertNilAttributeToNull = convertNilAttributeToNull;
     }
-
+
+    /**
+     * Configure the parser to use custom settings.
+     * @param keepStrings <code>true</code> to parse all values as string.
+     *      <code>false</code> to try and convert XML string values into a JSON value.
+     * @param cDataTagName <code>null</code> to disable CDATA processing. Any other value
+     *      to use that value as the JSONObject key name to process as CDATA.
+     * @param convertNilAttributeToNull <code>true</code> to parse values with attribute xsi:nil="true" as null.
+     *                                  <code>false</code> to parse values with attribute xsi:nil="true" as {"xsi:nil":true}.
+     * @param xsiTypeMap  <code>new HashMap<String, XMLXsiTypeConverter<?>>()</code> to parse values with attribute
+     *                   xsi:type="integer" as integer,  xsi:type="string" as string
+     */
+    private XMLParserConfiguration (final boolean keepStrings, final String cDataTagName,
+            final boolean convertNilAttributeToNull, final Map<String, XMLXsiTypeConverter<?>> xsiTypeMap ) {
+        this.keepStrings = keepStrings;
+        this.cDataTagName = cDataTagName;
+        this.convertNilAttributeToNull = convertNilAttributeToNull;
+        this.xsiTypeMap = Collections.unmodifiableMap(xsiTypeMap);
+    }
+
     /**
      * Provides a new instance of the same configuration.
      */
@@ -143,7 +173,8 @@ protected XMLParserConfiguration clone() {
         return new XMLParserConfiguration(
                 this.keepStrings,
                 this.cDataTagName,
-                this.convertNilAttributeToNull
+                this.convertNilAttributeToNull,
+                this.xsiTypeMap
         );
     }
 
@@ -225,4 +256,31 @@ public XMLParserConfiguration withConvertNilAttributeToNull(final boolean newVal
         newConfig.convertNilAttributeToNull = newVal;
         return newConfig;
     }
+
+    /**
+     * When parsing the XML into JSON, specifies that the values with attribute xsi:type
+     * will be converted to target type defined to client in this configuration
+     * {@code Map<String, XMLXsiTypeConverter<?>>} to parse values with attribute
+     * xsi:type="integer" as integer,  xsi:type="string" as string
+     * @return {@link #xsiTypeMap} unmodifiable configuration map.
+     */
+    public Map<String, XMLXsiTypeConverter<?>> getXsiTypeMap() {
+        return this.xsiTypeMap;
+    }
+
+    /**
+     * When parsing the XML into JSON, specifies that the values with attribute xsi:type
+     * will be converted to target type defined to client in this configuration
+     * {@code Map<String, XMLXsiTypeConverter<?>>} to parse values with attribute
+     * xsi:type="integer" as integer,  xsi:type="string" as string
+     * @param xsiTypeMap  {@code new HashMap<String, XMLXsiTypeConverter<?>>()} to parse values with attribute
+     *                   xsi:type="integer" as integer,  xsi:type="string" as string
+     * @return The existing configuration will not be modified. A new configuration is returned.
+     */
+    public XMLParserConfiguration withXsiTypeMap(final Map<String, XMLXsiTypeConverter<?>> xsiTypeMap) {
+        XMLParserConfiguration newConfig = this.clone();
+        Map<String, XMLXsiTypeConverter<?>> cloneXsiTypeMap = new HashMap<String, XMLXsiTypeConverter<?>>(xsiTypeMap);
+        newConfig.xsiTypeMap = Collections.unmodifiableMap(cloneXsiTypeMap);
+        return newConfig;
+    }
 }

src/main/java/org/json/XMLXsiTypeConverter.java

@@ -0,0 +1,66 @@
+package org.json;
+/*
+Copyright (c) 2002 JSON.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+/**
+ * Type conversion configuration interface to be used with xsi:type attributes.
+ * <pre>
+ * <b>XML Sample</b>
+ * {@code
+ *      <root>
+ *          <asString xsi:type="string">12345</asString>
+ *          <asInt xsi:type="integer">54321</asInt>
+ *      </root>
+ * }
+ * <b>JSON Output</b>
+ * {@code
+ *     {
+ *         "root" : {
+ *             "asString" : "12345",
+ *             "asInt": 54321
+ *         }
+ *     }
+ * }
+ *
+ * <b>Usage</b>
+ * {@code
+ *      Map<String, XMLXsiTypeConverter<?>> xsiTypeMap = new HashMap<String, XMLXsiTypeConverter<?>>();
+ *      xsiTypeMap.put("string", new XMLXsiTypeConverter<String>() {
+ *          &#64;Override public String convert(final String value) {
+ *              return value;
+ *          }
+ *      });
+ *      xsiTypeMap.put("integer", new XMLXsiTypeConverter<Integer>() {
+ *          &#64;Override public Integer convert(final String value) {
+ *              return Integer.valueOf(value);
+ *          }
+ *      });
+ * }
+ * </pre>
+ * @author kumar529
+ * @param <T> return type of convert method
+ */
+public interface XMLXsiTypeConverter<T> {
+    T convert(String value);
+}

src/test/java/org/json/junit/XMLTest.java

@@ -38,13 +38,16 @@ of this software and associated documentation files (the "Software"), to deal
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.io.StringReader;
+import java.util.HashMap;
+import java.util.Map;
 
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.json.JSONTokener;
 import org.json.XML;
 import org.json.XMLParserConfiguration;
+import org.json.XMLXsiTypeConverter;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
@@ -972,5 +975,97 @@ public void testIssue537CaseSensitiveHexUnEscapeDirect(){
 
         assertEquals("Case insensitive Entity unescape",  expectedStr, actualStr);
     }
-
-}
+
+    /**
+     * test passes when xsi:type="java.lang.String" not converting to string
+     */
+    @Test
+    public void testToJsonWithTypeWhenTypeConversionDisabled() {
+        String originalXml = "<root><id xsi:type=\"string\">1234</id></root>";
+        String expectedJsonString = "{\"root\":{\"id\":{\"xsi:type\":\"string\",\"content\":1234}}}";
+        JSONObject expectedJson = new JSONObject(expectedJsonString);
+        JSONObject actualJson = XML.toJSONObject(originalXml, new XMLParserConfiguration());
+        Util.compareActualVsExpectedJsonObjects(actualJson,expectedJson);
+    }
+
+    /**
+     * test passes when xsi:type="java.lang.String" converting to String
+     */
+    @Test
+    public void testToJsonWithTypeWhenTypeConversionEnabled() {
+        String originalXml = "<root><id1 xsi:type=\"string\">1234</id1>"
+                + "<id2 xsi:type=\"integer\">1234</id2></root>";
+        String expectedJsonString = "{\"root\":{\"id2\":1234,\"id1\":\"1234\"}}";
+        JSONObject expectedJson = new JSONObject(expectedJsonString);
+        Map<String, XMLXsiTypeConverter<?>> xsiTypeMap = new HashMap<String, XMLXsiTypeConverter<?>>();
+        xsiTypeMap.put("string", new XMLXsiTypeConverter<String>() {
+            @Override public String convert(final String value) {
+                return value;
+            }
+        });
+        xsiTypeMap.put("integer", new XMLXsiTypeConverter<Integer>() {
+            @Override public Integer convert(final String value) {
+                return Integer.valueOf(value);
+            }
+        });
+        JSONObject actualJson = XML.toJSONObject(originalXml, new XMLParserConfiguration().withXsiTypeMap(xsiTypeMap));
+        Util.compareActualVsExpectedJsonObjects(actualJson,expectedJson);
+    }
+
+    @Test
+    public void testToJsonWithXSITypeWhenTypeConversionEnabled() {
+        String originalXml = "<root><asString xsi:type=\"string\">12345</asString><asInt "
+                + "xsi:type=\"integer\">54321</asInt></root>";
+        String expectedJsonString = "{\"root\":{\"asString\":\"12345\",\"asInt\":54321}}";
+        JSONObject expectedJson = new JSONObject(expectedJsonString);
+        Map<String, XMLXsiTypeConverter<?>> xsiTypeMap = new HashMap<String, XMLXsiTypeConverter<?>>();
+        xsiTypeMap.put("string", new XMLXsiTypeConverter<String>() {
+            @Override public String convert(final String value) {
+                return value;
+            }
+        });
+        xsiTypeMap.put("integer", new XMLXsiTypeConverter<Integer>() {
+            @Override public Integer convert(final String value) {
+                return Integer.valueOf(value);
+            }
+        });
+        JSONObject actualJson = XML.toJSONObject(originalXml, new XMLParserConfiguration().withXsiTypeMap(xsiTypeMap));
+        Util.compareActualVsExpectedJsonObjects(actualJson,expectedJson);
+    }
+
+    @Test
+    public void testToJsonWithXSITypeWhenTypeConversionNotEnabledOnOne() {
+        String originalXml = "<root><asString xsi:type=\"string\">12345</asString><asInt>54321</asInt></root>";
+        String expectedJsonString = "{\"root\":{\"asString\":\"12345\",\"asInt\":54321}}";
+        JSONObject expectedJson = new JSONObject(expectedJsonString);
+        Map<String, XMLXsiTypeConverter<?>> xsiTypeMap = new HashMap<String, XMLXsiTypeConverter<?>>();
+        xsiTypeMap.put("string", new XMLXsiTypeConverter<String>() {
+            @Override public String convert(final String value) {
+                return value;
+            }
+        });
+        JSONObject actualJson = XML.toJSONObject(originalXml, new XMLParserConfiguration().withXsiTypeMap(xsiTypeMap));
+        Util.compareActualVsExpectedJsonObjects(actualJson,expectedJson);
+    }
+
+    @Test
+    public void testXSITypeMapNotModifiable() {
+        Map<String, XMLXsiTypeConverter<?>> xsiTypeMap = new HashMap<String, XMLXsiTypeConverter<?>>();
+        XMLParserConfiguration config = new XMLParserConfiguration().withXsiTypeMap(xsiTypeMap);
+        xsiTypeMap.put("string", new XMLXsiTypeConverter<String>() {
+            @Override public String convert(final String value) {
+                return value;
+            }
+        });
+        assertEquals("Config Conversion Map size is expected to be 0", 0, config.getXsiTypeMap().size());
+
+        try {
+            config.getXsiTypeMap().put("boolean", new XMLXsiTypeConverter<Boolean>() {
+                @Override public Boolean convert(final String value) {
+                    return Boolean.valueOf(value);
+                }
+            });
+            fail("Expected to be unable to modify the config");
+        } catch (Exception ignored) { }
+    }
+}