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package com.pgvector;

import java.io.Serializable;

import java.sql.Connection;

import java.sql.SQLException;

import java.util.Arrays;

import java.util.List;

import java.util.Objects;

import org.postgresql.PGConnection;

import org.postgresql.util.ByteConverter;

import org.postgresql.util.PGBinaryObject;

import org.postgresql.util.PGobject;

/**

* A bit string.

public class PGbit extends PGobject implements PGBinaryObject, Serializable, Cloneable {

private int length;

private byte[] data;

/**

* @hidden

public PGbit() {

type = "bit";

}

/**

* Creates a bit string from a boolean array.

* @param v boolean array

public PGbit(boolean[] v) {

this();

length = v.length;

data = new byte[(length + 7) / 8];

for (int i = 0; i < length; i++) {

data[i / 8] |= (v[i] ? 1 : 0) << (7 - (i % 8));

}

/**

* Creates a bit string from a byte array.

* @param v byte array

public PGbit(byte[] v) {

this();

length = Math.multiplyExact(v.length, 8);

data = v;

}

/**

* Creates a bit string from a text representation.

* @param s text representation of a bit string

* @throws SQLException exception

public PGbit(String s) throws SQLException {

this();

setValue(s);

}

/**

* Sets the value from a text representation of a bit string.

public void setValue(String s) throws SQLException {

if (s == null) {

data = null;

} else {

length = s.length();

data = new byte[(length + 7) / 8];

for (int i = 0; i < length; i++) {

data[i / 8] |= (s.charAt(i) != '0' ? 1 : 0) << (7 - (i % 8));

}

/**

* Returns the text representation of a bit string.

public String getValue() {

if (data == null) {

return null;

} else {

StringBuilder sb = new StringBuilder(length);

for (int i = 0; i < length; i++) {

sb.append(((data[i / 8] >> (7 - (i % 8))) & 1) == 1 ? '1' : '0');

}

return sb.toString();

}

/**

* Returns the number of bytes for the binary representation.

public int lengthInBytes() {

return data == null ? 0 : 4 + data.length;

}

/**

* Sets the value from a binary representation of a bit string.

public void setByteValue(byte[] value, int offset) throws SQLException {

length = ByteConverter.int4(value, offset);

data = new byte[(length + 7) / 8];

for (int i = 0; i < data.length; i++) {

data[i] = value[offset + 4 + i];

}

/**

* Writes the binary representation of a bit string.

public void toBytes(byte[] bytes, int offset) {

if (data == null) {

return;

}

ByteConverter.int4(bytes, offset, length);

for (int i = 0; i < data.length; i++) {

bytes[offset + 4 + i] = data[i];

}

/**

* Returns the length.

* @return an array

public int length() {

return length;

}

/**

* Returns a byte array.

* @return an array

public byte[] toByteArray() {

return data;

}

/**

* Returns an array.

* @return an array

public boolean[] toArray() {

boolean[] bits = new boolean[length];

for (int i = 0; i < length; i++) {

bits[i] = ((data[i / 8] >> (7 - (i % 8))) & 1) == 1;

}

return bits;

}

/**

* Registers the bit type.

* @param conn connection

* @throws SQLException exception

public static void registerType(Connection conn) throws SQLException {

conn.unwrap(PGConnection.class).addDataType("bit", PGbit.class);

}

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