Java tutorial
/* * Copyright 2005 JBoss Inc * * 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 org.drools; import java.io.Externalizable; import java.io.IOException; import java.io.ObjectInput; import java.io.ObjectOutput; public class CheeseEqual implements Externalizable { private static final long serialVersionUID = 510l; protected String type; protected int price; public void writeExternal(ObjectOutput out) throws IOException { out.writeObject(type); out.writeInt(price); } public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { type = (String) in.readObject(); price = in.readInt(); } public CheeseEqual() { } public CheeseEqual(final String type, final int price) { super(); this.type = type; this.price = price; } public int getPrice() { return this.price; } public String getType() { return this.type; } public void setPrice(final int price) { this.price = price; } public String toString() { return "CheeseEqual( type='" + this.type + "', price=" + this.price + " )"; } public boolean equals(final Object object) { if (this == object) { return true; } if ((object == null) || (object.getClass() != this.getClass())) { return false; } final CheeseEqual other = (CheeseEqual) object; if (!this.type.equals(other.type)) { return false; } if (this.price != other.price) { return false; } return true; } public int hashCode() { //like org.apache.commons.lang.builder.HashCodeBuilder int hashCode = 17; hashCode = hashCode * 37 + this.price; hashCode = hashCode * 37 + (this.type == null ? 0 : this.type.hashCode()); return hashCode; } public void setType(String type) { this.type = type; } }