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POComparing two Lists in java
 

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  1. POComparing two Lists in java
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    <p>In an application we have a Boarding table having ( boarding_id + invoice_no + item_id ) as key. A Boarding_tmp table with same table structure as Boarding. We are loading Boarding_tmp from a csv file (pipe separator column values) </p> <p>We have a Boarding java bean with all columns. Let's say we have two list -</p> <pre><code>1. boardingList with all active records in Boarding table 2. boardingTmpList with all records in Boarding_Tmp table </code></pre> <p>I need to compare these two list to implement below scenario -</p> <p>We Need to compare Boarding table with Boarding_tmp table and need to do following (No SQL joins. We have to perform this on object level) -</p> <pre><code>a. All records which are in Boarding_tmp but not in Boarding table should be inserted in Boarding table (means they are new records) b. All records which are in Boarding but not in Boarding_tmp table should be mark as deactivated in Boarding table (we have a active column in Boarding table) </code></pre> <p>Here in Boarding.java -</p> <pre><code>public class Boarding implements Comparable { private String bordingId; private String itemId; private String invoiceNo; private String itemName; private long qty; private double price; /** * @return the bordingId */ public String getBordingId() { return bordingId; } /** * @param bordingId * the bordingId to set */ public void setBordingId(String bordingId) { this.bordingId = bordingId; } /** * @return the itemId */ public String getItemId() { return itemId; } /** * @param itemId * the itemId to set */ public void setItemId(String itemId) { this.itemId = itemId; } /** * @return the invoiceNo */ public String getInvoiceNo() { return invoiceNo; } /** * @param invoiceNo * the invoiceNo to set */ public void setInvoiceNo(String invoiceNo) { this.invoiceNo = invoiceNo; } /** * @return the itemName */ public String getItemName() { return itemName; } /** * @param itemName * the itemName to set */ public void setItemName(String itemName) { this.itemName = itemName; } /** * @return the qty */ public long getQty() { return qty; } /** * @param qty * the qty to set */ public void setQty(long qty) { this.qty = qty; } /** * @return the price */ public double getPrice() { return price; } /** * @param price * the price to set */ public void setPrice(double price) { this.price = price; } /* * (non-Javadoc) * * @see java.lang.Object#hashCode() */ @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((bordingId == null) ? 0 : bordingId.hashCode()); result = prime * result + ((invoiceNo == null) ? 0 : invoiceNo.hashCode()); result = prime * result + ((itemId == null) ? 0 : itemId.hashCode()); return result; } @Override public int compareTo(Object o) { if (this == o) { return 0; } if (o == null) { return 1; } if (getClass() != o.getClass()) { return 1; } Boarding other = (Boarding) o; if (bordingId == null) { if (other.bordingId != null) { return 1; } } else if (!bordingId.equals(other.bordingId)) { return 1; } if (invoiceNo == null) { if (other.invoiceNo != null) { return 1; } } else if (!invoiceNo.equals(other.invoiceNo)) { return 1; } if (itemId == null) { if (other.itemId != null) { return 1; } } else if (!itemId.equals(other.itemId)) { return 1; } return 0; } } </code></pre> <p>Please help. Thanks.</p>
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    1. USSaurabh
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