Java tutorial
/* * 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.phoenix.util; import java.text.FieldPosition; import java.text.Format; import java.text.ParsePosition; import org.apache.commons.codec.binary.Hex; /** * A formatter that formats a byte array to a hexadecimal string * (with each byte converted to a 2-digit hex sequence) * * @author snakhoda-sfdc */ public class VarBinaryFormatter extends Format { private static final long serialVersionUID = -7940880118392024750L; public static final VarBinaryFormatter INSTANCE = new VarBinaryFormatter(); @Override public StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos) { if (!(obj instanceof byte[])) { throw new IllegalArgumentException("VarBinaryFormatter can only format byte arrays"); } String hexString = Hex.encodeHexString((byte[]) obj); toAppendTo.append(hexString); return toAppendTo; } @Override public Object parseObject(String source, ParsePosition pos) { return new UnsupportedOperationException(); } }