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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hadoop.mapreduce.util;
import org.apache.pig.ResourceSchema;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.logicalLayer.schema.Schema;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TupleTools {
private static final Pattern pattern = Pattern.compile("<([\\w]+)>");
public static Map<String, Object> tupleMap(Schema schema, Tuple tuple) throws IOException {
Map<String, Object> tupleMap = new HashMap<>((int)Math.ceil(tuple.size() / 0.75) + 1);
List<Schema.FieldSchema> schemas = schema.getFields();
for (int i = 0; i < schemas.size(); i++) {
Schema.FieldSchema field = schemas.get(i);
String alias = field.alias;
Object value = tuple.get(i);
if (value != null) {
tupleMap.put(alias, value);
}
}
return tupleMap;
}
public static Map<String, Object> tupleMap(ResourceSchema schema, Tuple tuple) throws IOException {
Map<String, Object> tupleMap = new HashMap<>((int)Math.ceil(tuple.size() / 0.75) + 1);
ResourceSchema.ResourceFieldSchema[] schemas = schema.getFields();
for (int i = 0; i < schemas.length; i++) {
ResourceSchema.ResourceFieldSchema field = schemas[i];
String alias = field.getName();
Object value = tuple.get(i);
if (value != null) {
tupleMap.put(alias, value);
}
}
return tupleMap;
}
public static String toString(Schema schema, Tuple tuple, String template) throws IOException {
return toString(tupleMap(schema, tuple), template);
}
public static String toString(Map<String,Object> fields, String template) {
if (template == null || template.length() == 0) {
return template;
}
if (fields == null || fields.size() == 0) {
return template;
}
Matcher m = pattern.matcher(template);
StringBuffer sb = new StringBuffer();
while (m.find()) {
Object value = fields.get(m.group(1));
String replacement = value != null ? value.toString() : m.group(0);
m.appendReplacement(sb, Matcher.quoteReplacement(replacement));
}
m.appendTail(sb);
return sb.toString();
}
}
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