com.aerospike.client.exp.Expression Maven / Gradle / Ivy
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/*
* Copyright 2012-2022 Aerospike, Inc.
*
* Portions may be licensed to Aerospike, Inc. under one or more contributor
* license agreements WHICH ARE COMPATIBLE WITH THE APACHE LICENSE, VERSION 2.0.
*
* 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 com.aerospike.client.exp;
import java.io.Serializable;
import java.util.Arrays;
import com.aerospike.client.command.Command;
import com.aerospike.client.util.Crypto;
import com.aerospike.client.util.Packer;
/**
* Packed expression byte instructions.
*/
public final class Expression implements Serializable {
private static final long serialVersionUID = 1L;
private final byte[] bytes;
/**
* Expression constructor used by {@link Exp#build(Exp)}
*/
Expression(Exp exp) {
Packer packer = new Packer();
exp.pack(packer);
bytes = packer.toByteArray();
/*
for (int i = 0; i < bytes.length; i++) {
int b = bytes[i] & 0xff;
System.out.println("" + b);
}
*/
}
/**
* Expression constructor for packed expression instructions.
*/
Expression(byte[] bytes) {
this.bytes = bytes;
}
/**
* Return a new expression from packed expression instructions in bytes.
*/
public static Expression fromBytes(byte[] bytes) {
return new Expression(bytes);
}
/**
* Return a new expression from packed expression instructions in base64 encoded bytes.
*/
public static Expression fromBase64(byte[] bytes) {
return Expression.fromBytes(Crypto.decodeBase64(bytes, 0, bytes.length));
}
/**
* Return a new expression from packed expression instructions in base64 encoded string.
*/
public static Expression fromBase64(String s) {
return Expression.fromBase64(s.getBytes());
}
/**
* Return packed byte instructions.
*/
public byte[] getBytes() {
return bytes;
}
/**
* Return byte instructions in base64 encoding.
*/
public String getBase64() {
return Crypto.encodeBase64(bytes);
}
/**
* Estimate expression size in wire protocol.
* For internal use only.
*/
public int size() {
return bytes.length + Command.FIELD_HEADER_SIZE;
}
/**
* Write expression in wire protocol.
* For internal use only.
*/
public void write(Command cmd) {
cmd.writeExpHeader(bytes.length);
System.arraycopy(bytes, 0, cmd.dataBuffer, cmd.dataOffset, bytes.length);
cmd.dataOffset += bytes.length;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + Arrays.hashCode(bytes);
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Expression other = (Expression) obj;
return Arrays.equals(bytes, other.bytes);
}
}