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/*
* 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.jute;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
/**
*
*/
public class BinaryInputArchive implements InputArchive {
public static final String UNREASONBLE_LENGTH = "Unreasonable length = ";
// CHECKSTYLE.OFF: ConstantName - for backward compatibility
public static final int maxBuffer = Integer.getInteger("jute.maxbuffer", 0xfffff);
// CHECKSTYLE.ON:
private static final int extraMaxBuffer;
static {
final Integer configuredExtraMaxBuffer =
Integer.getInteger("zookeeper.jute.maxbuffer.extrasize", maxBuffer);
if (configuredExtraMaxBuffer < 1024) {
// Earlier hard coded value was 1024, So the value should not be less than that value
extraMaxBuffer = 1024;
} else {
extraMaxBuffer = configuredExtraMaxBuffer;
}
}
private DataInput in;
private int maxBufferSize;
private int extraMaxBufferSize;
public static BinaryInputArchive getArchive(InputStream strm) {
return new BinaryInputArchive(new DataInputStream(strm));
}
private static class BinaryIndex implements Index {
private int nelems;
BinaryIndex(int nelems) {
this.nelems = nelems;
}
public boolean done() {
return (nelems <= 0);
}
public void incr() {
nelems--;
}
}
/**
* Creates a new instance of BinaryInputArchive.
*/
public BinaryInputArchive(DataInput in) {
this(in, maxBuffer, extraMaxBuffer);
}
public BinaryInputArchive(DataInput in, int maxBufferSize, int extraMaxBufferSize) {
this.in = in;
this.maxBufferSize = maxBufferSize;
this.extraMaxBufferSize = extraMaxBufferSize;
}
public byte readByte(String tag) throws IOException {
return in.readByte();
}
public boolean readBool(String tag) throws IOException {
return in.readBoolean();
}
public int readInt(String tag) throws IOException {
return in.readInt();
}
public long readLong(String tag) throws IOException {
return in.readLong();
}
public float readFloat(String tag) throws IOException {
return in.readFloat();
}
public double readDouble(String tag) throws IOException {
return in.readDouble();
}
public String readString(String tag) throws IOException {
int len = in.readInt();
if (len == -1) {
return null;
}
checkLength(len);
byte[] b = new byte[len];
in.readFully(b);
return new String(b, StandardCharsets.UTF_8);
}
public byte[] readBuffer(String tag) throws IOException {
int len = readInt(tag);
if (len == -1) {
return null;
}
checkLength(len);
byte[] arr = new byte[len];
in.readFully(arr);
return arr;
}
public void readRecord(Record r, String tag) throws IOException {
r.deserialize(this, tag);
}
public void startRecord(String tag) throws IOException {
}
public void endRecord(String tag) throws IOException {
}
public Index startVector(String tag) throws IOException {
int len = readInt(tag);
if (len == -1) {
return null;
}
return new BinaryIndex(len);
}
public void endVector(String tag) throws IOException {
}
public Index startMap(String tag) throws IOException {
return new BinaryIndex(readInt(tag));
}
public void endMap(String tag) throws IOException {
}
// Since this is a rough sanity check, add some padding to maxBuffer to
// make up for extra fields, etc. (otherwise e.g. clients may be able to
// write buffers larger than we can read from disk!)
private void checkLength(int len) throws IOException {
if (len < 0 || len > maxBufferSize + extraMaxBufferSize) {
throw new IOException(UNREASONBLE_LENGTH + len);
}
}
}
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