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- /*
- @VaadinApache2LicenseForJavaFiles@
- */
- package com.vaadin.data.util.sqlcontainer;
-
- import java.io.Serializable;
-
- /**
- * RowId represents identifiers of a single database result set row.
- *
- * The data structure of a RowId is an Object array which contains the values of
- * the primary key columns of the identified row. This allows easy equals()
- * -comparison of RowItems.
- */
- public class RowId implements Serializable {
- private static final long serialVersionUID = -3161778404698901258L;
- protected Object[] id;
-
- /**
- * Prevent instantiation without required parameters.
- */
- protected RowId() {
- }
-
- public RowId(Object[] id) {
- if (id == null) {
- throw new IllegalArgumentException("id parameter must not be null!");
- }
- this.id = id;
- }
-
- public Object[] getId() {
- return id;
- }
-
- @Override
- public int hashCode() {
- int result = 31;
- if (id != null) {
- for (Object o : id) {
- if (o != null) {
- result += o.hashCode();
- }
- }
- }
- return result;
- }
-
- @Override
- public boolean equals(Object obj) {
- if (obj == null || !(obj instanceof RowId)) {
- return false;
- }
- Object[] compId = ((RowId) obj).getId();
- if (id == null && compId == null) {
- return true;
- }
- if (id.length != compId.length) {
- return false;
- }
- for (int i = 0; i < id.length; i++) {
- if ((id[i] == null && compId[i] != null)
- || (id[i] != null && !id[i].equals(compId[i]))) {
- return false;
- }
- }
- return true;
- }
-
- @Override
- public String toString() {
- StringBuffer s = new StringBuffer();
- for (int i = 0; i < id.length; i++) {
- s.append(id[i]);
- if (i < id.length - 1) {
- s.append("/");
- }
- }
- return s.toString();
- }
- }
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