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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.parquet.schema;
import static java.util.concurrent.TimeUnit.HOURS;
import static java.util.concurrent.TimeUnit.MICROSECONDS;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.MINUTES;
import static java.util.concurrent.TimeUnit.SECONDS;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
import javax.naming.OperationNotSupportedException;
import org.apache.parquet.io.api.Binary;
/**
* Class that provides string representations for the primitive values. These string values are to be used for
* logging/debugging purposes. The method {@code stringify} is overloaded for each primitive types. The overloaded
* methods not implemented for the related types throw {@link OperationNotSupportedException}.
*/
public abstract class PrimitiveStringifier {
private final String name;
private PrimitiveStringifier(String name) {
this.name = name;
}
@Override
public final String toString() {
return name;
}
/**
* @param value
* the value to be stringified
* @return the string representation for {@code value}
* @throws UnsupportedOperationException
* if value type is not supported by this stringifier
*/
public String stringify(boolean value) {
throw new UnsupportedOperationException(
"stringify(boolean) was called on a non-boolean stringifier: " + toString());
}
/**
* @param value
* the value to be stringified
* @return the string representation for {@code value}
* @throws UnsupportedOperationException
* if value type is not supported by this stringifier
*/
public String stringify(int value) {
throw new UnsupportedOperationException("stringify(int) was called on a non-int stringifier: " + toString());
}
/**
* @param value
* the value to be stringified
* @return the string representation for {@code value}
* @throws UnsupportedOperationException
* if value type is not supported by this stringifier
*/
public String stringify(long value) {
throw new UnsupportedOperationException("stringify(long) was called on a non-long stringifier: " + toString());
}
/**
* @param value
* the value to be stringified
* @return the string representation for {@code value}
* @throws UnsupportedOperationException
* if value type is not supported by this stringifier
*/
public String stringify(float value) {
throw new UnsupportedOperationException(
"stringify(float) was called on a non-float stringifier: " + toString());
}
/**
* @param value
* the value to be stringified
* @return the string representation for {@code value}
* @throws UnsupportedOperationException
* if value type is not supported by this stringifier
*/
public String stringify(double value) {
throw new UnsupportedOperationException(
"stringify(double) was called on a non-double stringifier: " + toString());
}
/**
* @param value
* the value to be stringified
* @return the string representation for {@code value}
* @throws UnsupportedOperationException
* if value type is not supported by this stringifier
*/
public String stringify(Binary value) {
throw new UnsupportedOperationException(
"stringify(Binary) was called on a non-Binary stringifier: " + toString());
}
private static final String BINARY_NULL = "null";
private static final String BINARY_HEXA_PREFIX = "0x";
private static final String BINARY_INVALID = "";
static abstract class BinaryStringifierBase extends PrimitiveStringifier {
private BinaryStringifierBase(String name) {
super(name);
}
@Override
public final String stringify(Binary value) {
return value == null ? BINARY_NULL : stringifyNotNull(value);
}
abstract String stringifyNotNull(Binary value);
}
static final PrimitiveStringifier DEFAULT_STRINGIFIER = new BinaryStringifierBase("DEFAULT_STRINGIFIER") {
private final char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
@Override
public String stringify(boolean value) {
return Boolean.toString(value);
}
@Override
public String stringify(int value) {
return Integer.toString(value);
}
@Override
public String stringify(long value) {
return Long.toString(value);
}
@Override
public String stringify(float value) {
return Float.toString(value);
}
@Override
public String stringify(double value) {
return Double.toString(value);
}
@Override
String stringifyNotNull(Binary value) {
ByteBuffer buffer = value.toByteBuffer();
StringBuilder builder = new StringBuilder(2 + buffer.remaining() * 2);
builder.append(BINARY_HEXA_PREFIX);
for (int i = buffer.position(), n = buffer.limit(); i < n; ++i) {
byte b = buffer.get(i);
builder.append(digits[(b >>> 4) & 0x0F]);
builder.append(digits[b & 0x0F]);
}
return builder.toString();
}
};
static final PrimitiveStringifier UNSIGNED_STRINGIFIER = new PrimitiveStringifier("UNSIGNED_STRINGIFIER") {
private static final long INT_MASK = 0x00000000FFFFFFFFl;
// Implemented based on com.facebook.presto.hive.$internal.com.google.common.primitives.UnsignedInts.toString(int, int)
@Override
public String stringify(int value) {
return Long.toString(value & INT_MASK);
}
// Implemented based on com.facebook.presto.hive.$internal.com.google.common.primitives.UnsignedLongs.toString(long, int)
@Override
public String stringify(long value) {
if (value == 0) {
// Simply return "0"
return "0";
} else if (value > 0) {
return Long.toString(value);
} else {
char[] buf = new char[64];
int i = buf.length;
// Split x into high-order and low-order halves.
// Individual digits are generated from the bottom half into which
// bits are moved continuously from the top half.
long top = value >>> 32;
long bot = (value & INT_MASK) + ((top % 10) << 32);
top /= 10;
while ((bot > 0) || (top > 0)) {
buf[--i] = Character.forDigit((int) (bot % 10), 10);
bot = (bot / 10) + ((top % 10) << 32);
top /= 10;
}
// Generate string
return new String(buf, i, buf.length - i);
}
}
};
static final PrimitiveStringifier UTF8_STRINGIFIER = new BinaryStringifierBase("UTF8_STRINGIFIER") {
@Override
String stringifyNotNull(Binary value) {
return value.toStringUsingUTF8();
}
};
static final PrimitiveStringifier INTERVAL_STRINGIFIER = new BinaryStringifierBase("INTERVAL_STRINGIFIER") {
@Override
String stringifyNotNull(Binary value) {
if (value.length() != 12) {
return BINARY_INVALID;
}
ByteBuffer buffer = value.toByteBuffer().order(ByteOrder.LITTLE_ENDIAN);
int pos = buffer.position();
String months = UNSIGNED_STRINGIFIER.stringify(buffer.getInt(pos));
String days = UNSIGNED_STRINGIFIER.stringify(buffer.getInt(pos + 4));
String millis = UNSIGNED_STRINGIFIER.stringify(buffer.getInt(pos + 8));
return "interval(" + months + " months, " + days + " days, " + millis + " millis)";
}
};
private static class DateStringifier extends PrimitiveStringifier {
private final SimpleDateFormat formatter;
private static final TimeZone UTC = TimeZone.getTimeZone("utc");
private DateStringifier(String name, String format) {
super(name);
formatter = new SimpleDateFormat(format);
formatter.setTimeZone(UTC);
}
@Override
public String stringify(int value) {
return toFormattedString(toMillis(value));
}
@Override
public String stringify(long value) {
return toFormattedString(toMillis(value));
}
private String toFormattedString(long millis) {
return formatter.format(millis);
}
long toMillis(int value) {
// throw the related unsupported exception
super.stringify(value);
return 0;
}
long toMillis(long value) {
// throw the related unsupported exception
super.stringify(value);
return 0;
}
}
static final PrimitiveStringifier DATE_STRINGIFIER = new DateStringifier("DATE_STRINGIFIER", "yyyy-MM-dd") {
@Override
long toMillis(int value) {
return TimeUnit.DAYS.toMillis(value);
};
};
static final PrimitiveStringifier TIMESTAMP_MILLIS_STRINGIFIER = new DateStringifier(
"TIMESTAMP_MILLIS_STRINGIFIER", "yyyy-MM-dd'T'HH:mm:ss.SSS") {
@Override
long toMillis(long value) {
return value;
}
};
static final PrimitiveStringifier TIMESTAMP_MICROS_STRINGIFIER = new DateStringifier(
"TIMESTAMP_MICROS_STRINGIFIER", "yyyy-MM-dd'T'HH:mm:ss.SSS") {
@Override
public String stringify(long value) {
return super.stringify(value) + String.format("%03d", Math.abs(value % 1000));
}
@Override
long toMillis(long value) {
return value / 1000;
}
};
static final PrimitiveStringifier TIME_STRINGIFIER = new PrimitiveStringifier("TIME_STRINGIFIER") {
@Override
public String stringify(int millis) {
return toTimeString(millis, MILLISECONDS);
}
@Override
public String stringify(long micros) {
return toTimeString(micros, MICROSECONDS);
}
private String toTimeString(long duration, TimeUnit unit) {
String format = "%02d:%02d:%02d.%0" + (unit == MILLISECONDS ? "3d" : "6d");
return String.format(format,
unit.toHours(duration),
convert(duration, unit, MINUTES, HOURS),
convert(duration, unit, SECONDS, MINUTES),
convert(duration, unit, unit, SECONDS));
}
private long convert(long duration, TimeUnit from, TimeUnit to, TimeUnit higher) {
return Math.abs(to.convert(duration, from) % to.convert(1, higher));
}
};
static PrimitiveStringifier createDecimalStringifier(final int scale) {
return new BinaryStringifierBase("DECIMAL_STRINGIFIER(scale: " + scale + ")") {
@Override
public String stringify(int value) {
return stringifyWithScale(BigInteger.valueOf(value));
}
@Override
public String stringify(long value) {
return stringifyWithScale(BigInteger.valueOf(value));
}
@Override
String stringifyNotNull(Binary value) {
try {
return stringifyWithScale(new BigInteger(value.getBytesUnsafe()));
} catch (NumberFormatException e) {
return BINARY_INVALID;
}
}
private String stringifyWithScale(BigInteger i) {
return new BigDecimal(i, scale).toString();
}
};
}
}
