package org.apache.avro.util.internal;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.apache.avro.AvroRuntimeException;
import org.apache.avro.JsonProperties;
import org.apache.avro.Schema;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.util.TokenBuffer;
public class JacksonUtils {
private JacksonUtils() {
}
public static JsonNode toJsonNode(Object datum) {
if (datum == null) {
return null;
}
try {
TokenBuffer generator = new TokenBuffer(new ObjectMapper(), false);
toJson(datum, generator);
return new ObjectMapper().readTree(generator.asParser());
} catch (IOException e) {
throw new AvroRuntimeException(e);
}
}
@SuppressWarnings(value = "unchecked")
static void toJson(Object datum, JsonGenerator generator) throws IOException {
if (datum == JsonProperties.NULL_VALUE) {
generator.writeNull();
} else if (datum instanceof Map) {
generator.writeStartObject();
for (Map.Entry<Object, Object> entry : ((Map<Object, Object>) datum).entrySet()) {
generator.writeFieldName(entry.getKey().toString());
toJson(entry.getValue(), generator);
}
generator.writeEndObject();
} else if (datum instanceof Collection) {
generator.writeStartArray();
for (Object element : (Collection<?>) datum) {
toJson(element, generator);
}
generator.writeEndArray();
} else if (datum instanceof byte[]) {
generator.writeString(new String((byte[]) datum, StandardCharsets.ISO_8859_1));
} else if (datum instanceof CharSequence || datum instanceof Enum<?>) {
generator.writeString(datum.toString());
} else if (datum instanceof Double) {
generator.writeNumber((Double) datum);
} else if (datum instanceof Float) {
generator.writeNumber((Float) datum);
} else if (datum instanceof Long) {
generator.writeNumber((Long) datum);
} else if (datum instanceof Integer) {
generator.writeNumber((Integer) datum);
} else if (datum instanceof Boolean) {
generator.writeBoolean((Boolean) datum);
} else {
throw new AvroRuntimeException("Unknown datum class: " + datum.getClass());
}
}
public static Object toObject(JsonNode jsonNode) {
return toObject(jsonNode, null);
}
public static Object toObject(JsonNode jsonNode, Schema schema) {
if (schema != null && schema.getType().equals(Schema.Type.UNION)) {
return toObject(jsonNode, schema.getTypes().get(0));
}
if (jsonNode == null) {
return null;
} else if (jsonNode.isNull()) {
return JsonProperties.NULL_VALUE;
} else if (jsonNode.isBoolean()) {
return jsonNode.asBoolean();
} else if (jsonNode.isInt()) {
if (schema == null || schema.getType().equals(Schema.Type.INT)) {
return jsonNode.asInt();
} else if (schema.getType().equals(Schema.Type.LONG)) {
return jsonNode.asLong();
}
} else if (jsonNode.isLong()) {
return jsonNode.asLong();
} else if (jsonNode.isDouble() || jsonNode.isFloat()) {
if (schema == null || schema.getType().equals(Schema.Type.DOUBLE)) {
return jsonNode.asDouble();
} else if (schema.getType().equals(Schema.Type.FLOAT)) {
return (float) jsonNode.asDouble();
}
} else if (jsonNode.isTextual()) {
if (schema == null || schema.getType().equals(Schema.Type.STRING) || schema.getType().equals(Schema.Type.ENUM)) {
return jsonNode.asText();
} else if (schema.getType().equals(Schema.Type.BYTES) || schema.getType().equals(Schema.Type.FIXED)) {
return jsonNode.textValue().getBytes(StandardCharsets.ISO_8859_1);
}
} else if (jsonNode.isArray()) {
List l = new ArrayList();
for (JsonNode node : jsonNode) {
l.add(toObject(node, schema == null ? null : schema.getElementType()));
}
return l;
} else if (jsonNode.isObject()) {
Map m = new LinkedHashMap();
for (Iterator<String> it = jsonNode.fieldNames(); it.hasNext();) {
String key = it.next();
Schema s = null;
if (schema == null) {
s = null;
} else if (schema.getType().equals(Schema.Type.MAP)) {
s = schema.getValueType();
} else if (schema.getType().equals(Schema.Type.RECORD)) {
s = schema.getField(key).schema();
}
Object value = toObject(jsonNode.get(key), s);
m.put(key, value);
}
return m;
}
return null;
}
}