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Added a wrapper for readTree and treeToValue
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55 changes: 55 additions & 0 deletions
55
rskj-core/src/main/java/co/rsk/util/JacksonParserUtil.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,55 @@ | ||
| package co.rsk.util; | ||
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| import com.fasterxml.jackson.core.JsonProcessingException; | ||
| import com.fasterxml.jackson.core.TreeNode; | ||
| import com.fasterxml.jackson.databind.JsonMappingException; | ||
| import com.fasterxml.jackson.databind.JsonNode; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
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| import java.io.IOException; | ||
| import java.io.InputStream; | ||
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| public final class JacksonParserUtil { | ||
| private JacksonParserUtil() { | ||
| } | ||
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| public static <T> T treeToValue(ObjectMapper mapper, TreeNode treeNode, Class<T> aClass) throws IllegalArgumentException, JsonProcessingException { | ||
| T result = mapper.treeToValue(treeNode, aClass); | ||
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| if (result == null) { | ||
| throw new NullPointerException("Input is null"); | ||
| } | ||
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| return result; | ||
| } | ||
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| public static JsonNode readTree(ObjectMapper mapper, InputStream is) throws IOException { | ||
| JsonNode result = mapper.readTree(is); | ||
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| if (result.isEmpty()) { | ||
| throw JsonMappingException.from(mapper.getDeserializationContext(), "Input is empty"); | ||
| } | ||
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| return result; | ||
| } | ||
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| public static JsonNode readTree(ObjectMapper mapper, String content) throws IOException { | ||
| JsonNode result = mapper.readTree(content); | ||
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| if (result.isEmpty()) { | ||
| throw JsonMappingException.from(mapper.getDeserializationContext(), "Input is empty"); | ||
| } | ||
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| return result; | ||
| } | ||
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| public static JsonNode readTree(ObjectMapper mapper, byte[] content) throws IOException { | ||
| JsonNode result = mapper.readTree(content); | ||
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| if (result.isEmpty()) { | ||
| throw JsonMappingException.from(mapper.getDeserializationContext(), "Input is empty"); | ||
| } | ||
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| return result; | ||
| } | ||
| } |
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65 changes: 65 additions & 0 deletions
65
rskj-core/src/test/java/co/rsk/util/JacksonParserUtilTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /* | ||
| * This file is part of RskJ | ||
| * Copyright (C) 2017 RSK Labs Ltd. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
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| package co.rsk.util; | ||
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| import com.fasterxml.jackson.databind.JsonNode; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
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| import java.io.ByteArrayInputStream; | ||
| import java.io.IOException; | ||
| import java.util.Map; | ||
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| public class JacksonParserUtilTest { | ||
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| @Test | ||
| public void test_treeToValue() throws IOException { | ||
| ObjectMapper mapper = new ObjectMapper(); | ||
| JsonNode jsonNode = JacksonParserUtil.readTree(mapper, "{\"prop\": \"value\"}"); | ||
| Map jsonMap = JacksonParserUtil.treeToValue(new ObjectMapper(), jsonNode, Map.class); | ||
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| Assert.assertEquals("value", jsonNode.get("prop").asText()); | ||
| } | ||
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| @Test | ||
| public void test_readTreeStringContent() throws IOException { | ||
| ObjectMapper mapper = new ObjectMapper(); | ||
| JsonNode jsonNode = JacksonParserUtil.readTree(mapper, "{\"prop\": \"value\"}"); | ||
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| Assert.assertEquals("value", jsonNode.get("prop").asText()); | ||
| } | ||
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| @Test | ||
| public void test_readTreeBytesContent() throws IOException { | ||
| ObjectMapper mapper = new ObjectMapper(); | ||
| JsonNode jsonNode = JacksonParserUtil.readTree(mapper, "{\"prop\": \"value\"}".getBytes()); | ||
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| Assert.assertEquals("value", jsonNode.get("prop").asText()); | ||
| } | ||
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| @Test | ||
| public void test_readTreeInputStreamContent() throws IOException { | ||
| ObjectMapper mapper = new ObjectMapper(); | ||
| JsonNode jsonNode = JacksonParserUtil.readTree(mapper, new ByteArrayInputStream("{\"prop\": \"value\"}".getBytes())); | ||
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| Assert.assertEquals("value", jsonNode.get("prop").asText()); | ||
| } | ||
| } |