org.fisco.bcos.sdk.rlp.RlpString Maven / Gradle / Ivy
/**
* Copyright 2014-2020 [fisco-dev]
*
* Licensed 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.fisco.bcos.sdk.rlp;
import java.math.BigInteger;
import java.util.Arrays;
import org.fisco.bcos.sdk.utils.Numeric;
/** RLP string type. */
public final class RlpString implements RlpType {
private static final byte[] EMPTY = new byte[] {};
public final byte[] value;
private RlpString(byte[] value) {
this.value = value;
}
public final byte[] getBytes() {
return value;
}
public BigInteger asPositiveBigInteger() {
if (value.length == 0) {
return BigInteger.ZERO;
}
return new BigInteger(1, value);
}
public String asString() {
return Numeric.toHexString(value);
}
public static RlpString create(byte[] value) {
return new RlpString(value);
}
public static RlpString create(byte value) {
return new RlpString(new byte[] {value});
}
public static RlpString create(BigInteger value) {
// RLP encoding only supports positive integer values
int valueSigNum = value.signum();
if (valueSigNum < 1) {
return new RlpString(EMPTY);
} else {
byte[] bytes = value.toByteArray();
if (bytes[0] == 0) { // remove leading zero
return new RlpString(Arrays.copyOfRange(bytes, 1, bytes.length));
} else {
return new RlpString(bytes);
}
}
}
public static RlpString create(long value) {
return create(BigInteger.valueOf(value));
}
public static RlpString create(String value) {
return new RlpString(value.getBytes());
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
RlpString rlpString = (RlpString) o;
return Arrays.equals(value, rlpString.value);
}
@Override
public int hashCode() {
return Arrays.hashCode(value);
}
}