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JSONUtility.toModel(): add support for parsing maps #1350

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JSONUtility.toModel(): add support for parsing maps #1350

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0535d87
Allow parsing maps in JSONUtility
Feb 14, 2020
1bd9572
Add test
Feb 14, 2020
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14 changes: 14 additions & 0 deletions org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/JSONUtility.java
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,9 @@
*******************************************************************************/
package org.eclipse.jdt.ls.core.internal;

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.lsp4j.jsonrpc.json.MessageJsonHandler;

Expand Down Expand Up @@ -61,6 +63,18 @@ private static <T> T toModel(Gson gson, Object object, Class<T> clazz) {
if (object instanceof String) {
return gson.fromJson((String) object, clazz);
}
if (object instanceof Map) {
try {
Map<String, Object> map = (Map<String, Object>) object;
T result = clazz.newInstance();
for (Field field : clazz.getFields()) {
field.set(result, map.get(field.getName()));
}
return result;
} catch (InstantiationException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
return null;
}
}
21 changes: 21 additions & 0 deletions org.eclipse.jdt.ls.tests/src/org/eclipse/jdt/ls/core/internal/JSONUtilityTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,12 @@

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertSame;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.lsp4j.Position;
import org.junit.Test;

Expand Down Expand Up @@ -54,4 +58,21 @@ public void testNullObject(){
assertNull(JSONUtility.toModel(null, Object.class));
}

private static class Options {
public String option1;
public String option2;
}

@Test
public void testMap() {
Map<String, Object> map = new HashMap<>();
map.put("option1", "value1");
map.put("option2", "value2");

Options options = JSONUtility.toModel(map, Options.class);
assertNotNull(options);
assertEquals(options.option1, "value1");
assertEquals(options.option2, "value2");
}

}