ActiveMQ example source code file (HashBin.java)

This example ActiveMQ source code file (HashBin.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

dataoutput, hashbin, hashbin, io, ioexception, ioexception, key, map, marshaller, page, treemap, treemap, util, value, value, variablemarshaller

The ActiveMQ HashBin.java source code

/**
 * 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.kahadb.index;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Map;
import java.util.TreeMap;

import org.apache.kahadb.page.Page;
import org.apache.kahadb.page.Transaction;
import org.apache.kahadb.util.VariableMarshaller;

/**
 * Bin in a HashIndex
 * 
 * 
 */
class HashBin<Key, Value> {
    
    
    static public class Marshaller<Key, Value> extends VariableMarshaller> {
        private final HashIndex<Key, Value> hashIndex;

        public Marshaller(HashIndex<Key, Value> index) {
            this.hashIndex = index;
        }
        
        public HashBin<Key, Value> readPayload(DataInput is) throws IOException {
            HashBin<Key, Value> bin = new HashBin();
            int size = is.readInt();
            for(int i=0; i < size; i++) {
                Key key = hashIndex.getKeyMarshaller().readPayload(is);
                Value value = hashIndex.getValueMarshaller().readPayload(is);
                bin.data.put(key, value);
            }
            return bin;
        }

        public void writePayload(HashBin<Key, Value> bin, DataOutput os) throws IOException {
            os.writeInt(bin.data.size());
            for (Map.Entry<Key, Value> entry : bin.data.entrySet()) {
                hashIndex.getKeyMarshaller().writePayload(entry.getKey(), os);
                hashIndex.getValueMarshaller().writePayload(entry.getValue(), os);
            }
        }
        
    }
    
    private Page<HashBin page;
    private TreeMap<Key, Value> data = new TreeMap();
    
    public int size() {
        return data.size();
    }

    public Value put(Key key, Value value) throws IOException {
        return data.put(key, value);
    }

    public Value get(Key key) throws IOException {
        return data.get(key);
    }
    
    public boolean containsKey(Key key) throws IOException {
        return data.containsKey(key);
    }
    
    public Map<Key, Value> getAll(Transaction tx) throws IOException {
        return data;
    }
    
    public Value remove(Key key) throws IOException {
        return data.remove(key);
    }

    public Page<HashBin getPage() {
        return page;
    }

    public void setPage(Page<HashBin page) {
        this.page = page;
        this.page.set(this);
    }


}