1.9.10/src/test/org/codehaus/jackson/map/TestToJavaType.java

package org.codehaus.jackson.map;

import java.io.*;
import java.util.*;

import org.codehaus.jackson.*;

/**
 * Unit tests for verifying "old" data binding from Json to JDK objects;
 * one that only uses core JDK types; wrappers, Maps and Lists.
 */
public class TestToJavaType
    extends main.BaseTest
{
    @SuppressWarnings("unchecked")
	public void testSampleDoc()
        throws Exception
    {
        final String JSON = SAMPLE_DOC_JSON_SPEC;

        JsonFactory jf = new JsonFactory();

        /* To get "untyped" Mapping (to Maps, Lists, instead of beans etc),
         * we'll specify plain old Object.class as the target.
         */
        Object root = new ObjectMapper().readValue(jf.createJsonParser(new StringReader(JSON)), Object.class);

        assertType(root, Map.class);
        Map<?,?> rootMap = (Map<?,?>) root;
        assertEquals(1, rootMap.size());
        Map.Entry<?,?> rootEntry =  rootMap.entrySet().iterator().next();
        assertEquals("Image", rootEntry.getKey());
        Object image = rootEntry.getValue();
        assertType(image, Map.class);
        Map<?,?> imageMap = (Map<?,?>) image;
        assertEquals(5, imageMap.size());

        Object value = imageMap.get("Width");
        assertType(value, Integer.class);
        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_WIDTH), value);

        value = imageMap.get("Height");
        assertType(value, Integer.class);
        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_HEIGHT), value);

        assertEquals(SAMPLE_SPEC_VALUE_TITLE, imageMap.get("Title"));

        // Another Object, "thumbnail"
        value = imageMap.get("Thumbnail");
        assertType(value, Map.class);
        Map<?,?> tnMap = (Map<?,?>) value;
        assertEquals(3, tnMap.size());

        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_TN_HEIGHT), tnMap.get("Height"));
        // for some reason, width is textual, not numeric...
        assertEquals(SAMPLE_SPEC_VALUE_TN_WIDTH, tnMap.get("Width"));
        assertEquals(SAMPLE_SPEC_VALUE_TN_URL, tnMap.get("Url"));

        // And then number list, "IDs"
        value = imageMap.get("IDs");
        assertType(value, List.class);
        List<Object> ids = (List<Object>) value;
        assertEquals(4, ids.size());
        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_TN_ID1), ids.get(0));
        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_TN_ID2), ids.get(1));
        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_TN_ID3), ids.get(2));
        assertEquals(Integer.valueOf(SAMPLE_SPEC_VALUE_TN_ID4), ids.get(3));

        // and that's all folks!
    }
}