ObjectContractsTest_equals_and_hashCode.java

/**
 *  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.isis.applib.util;

import java.util.List;

import com.google.common.collect.Lists;

import org.junit.Before;

import org.apache.isis.core.unittestsupport.value.ValueTypeContractTestAbstract;

public class ObjectContractsTest_equals_and_hashCode extends ValueTypeContractTestAbstract<InvoiceItem3> {

    private Invoice3 inv123;
    private Invoice3 inv456;

    @Before
    public void setUp() throws Exception {
        inv123 = new Invoice3();
        inv123.setNumber("123");
        inv456 = new Invoice3();
        inv456.setNumber("456");
    }

    @Override
    protected List<InvoiceItem3> getObjectsWithSameValue() {
        return Lists.newArrayList(
                    InvoiceItem3.newInvoiceItem(inv123, "A", new Integer(1)),
                    InvoiceItem3.newInvoiceItem(inv123, "A", new Integer(1))
                );
    }

    @Override
    protected List<InvoiceItem3> getObjectsWithDifferentValue() {
        return Lists.newArrayList(
                    InvoiceItem3.newInvoiceItem(null, "A", new Integer(2)),
                    InvoiceItem3.newInvoiceItem(inv456, "A", new Integer(2)),
                    InvoiceItem3.newInvoiceItem(inv123, null, new Integer(1)),
                    InvoiceItem3.newInvoiceItem(inv123, "A", new Integer(2)),
                    InvoiceItem3.newInvoiceItem(inv123, "B", new Integer(1)),
                    InvoiceItem3.newInvoiceItem(inv123, "A", null)
                );
    }
}

class Invoice3 {
    private static final String KEY_PROPERTIES = "number";
    
    private String number;
    public String getNumber() {
        return number;
    }
    public void setNumber(String number) {
        this.number = number;
    }
    @Override
    public int hashCode() {
        return ObjectContracts.hashCode(this, KEY_PROPERTIES);
    }
    @Override
    public boolean equals(Object obj) {
        return ObjectContracts.equals(this, obj, KEY_PROPERTIES);
    }
    
}

class InvoiceItem3 {

    static InvoiceItem3 newInvoiceItem(Invoice3 invoice, String productCode, Integer quantity) {
        final InvoiceItem3 invoiceItem = new InvoiceItem3();
        invoiceItem.setInvoice(invoice);
        invoiceItem.setProductCode(productCode);
        invoiceItem.setQuantity(quantity);
        return invoiceItem;
    }

    private Invoice3 invoice;
    public Invoice3 getInvoice() {
        return invoice;
    }
    public void setInvoice(Invoice3 invoice) {
        this.invoice = invoice;
    }

    private String productCode;
    public String getProductCode() {
        return productCode;
    }
    public void setProductCode(String productCode) {
        this.productCode = productCode;
    }
    
    private Integer quantity;
    public Integer getQuantity() {
        return quantity;
    }
    public void setQuantity(Integer quantity) {
        this.quantity = quantity;
    }
 
    
    private static final String KEY_PROPERTIES = "invoice desc, productCode, quantity";
    @Override
    public int hashCode() {
        return ObjectContracts.hashCode(this, KEY_PROPERTIES);
    }
    @Override
    public boolean equals(Object obj) {
        return ObjectContracts.equals(this, obj, KEY_PROPERTIES);
    }
}