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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.drill.exec.vector.complex.fn;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Charsets;
public class UTF8JsonRecordSplitter extends JsonRecordSplitterBase {
private final static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(UTF8JsonRecordSplitter.class);
private final InputStream incoming;
public UTF8JsonRecordSplitter(InputStream incoming){
this.incoming = new BufferedInputStream(incoming);
}
@Override
protected void preScan() throws IOException {
incoming.mark(MAX_RECORD_SIZE);
}
@Override
protected void postScan() throws IOException {
incoming.reset();
}
@Override
protected int readNext() throws IOException {
return incoming.read();
}
@Override
protected Reader createReader(long maxBytes) {
return new BufferedReader(new InputStreamReader(new DelInputStream(incoming, maxBytes), Charsets.UTF_8));
}
private class DelInputStream extends InputStream {
private final InputStream incoming;
private final long maxBytes;
private long bytes = 0;
public DelInputStream(InputStream in, long maxBytes) {
this.maxBytes = maxBytes;
this.incoming = in;
}
@Override
public int read() throws IOException {
if (bytes >= maxBytes){
return -1;
}else{
bytes++;
return incoming.read();
}
}
}
public static void main(String[] args) throws Exception {
String path = "/Users/hgunes/workspaces/mapr/incubator-drill/yelp_academic_dataset_review.json";
InputStream s = new FileInputStream(new File(path));
JsonRecordSplitter splitter = new UTF8JsonRecordSplitter(s);
int recordCount = 0;
Reader record = null;
ObjectMapper mapper = new ObjectMapper();
try {
while ((record = splitter.getNextReader()) != null) {
recordCount++;
JsonNode node = mapper.readTree(record);
out(node.toString());
}
} catch (Exception e) {
e.printStackTrace();
}
out("last record: " + recordCount);
}
static void out(Object thing) {
System.out.println(thing);
}
}
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