| /* |
| |
| Derby - Class org.apache.derby.iapi.services.io.DataInputUtil |
| |
| 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.derby.iapi.services.io; |
| |
| import java.io.DataInput; |
| import java.io.IOException; |
| |
| /** |
| * A util class for DataInput. |
| */ |
| public final class DataInputUtil { |
| |
| /** |
| * Skips requested number of bytes, |
| * throws EOFException if there is too few bytes in the DataInput. |
| * @param in |
| * DataInput to be skipped. |
| * @param skippedBytes |
| * number of bytes to skip. if skippedBytes <= zero, do nothing. |
| * @throws java.io.EOFException |
| * if EOF meets before requested number of bytes are skipped. |
| * @throws IOException |
| * if IOException occurs. It doesn't contain EOFException. |
| * @throws NullPointerException |
| * if the param 'in' equals null. |
| */ |
| public static void skipFully(DataInput in, int skippedBytes) |
| throws IOException { |
| if (in == null) { |
| throw new NullPointerException(); |
| } |
| |
| while (skippedBytes > 0) { |
| int skipped = in.skipBytes(skippedBytes); |
| if (skipped == 0) { |
| in.readByte(); |
| skipped++; |
| } |
| skippedBytes -= skipped; |
| } |
| } |
| } |