gaspersic/java-design-patterns
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JDBC removed...

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This commit is contained in:
Amit Dixit
2016-04-04 12:33:43 +05:30
parent deb15e2733
commit eb72493f13
4 changed files with 140 additions and 19 deletions
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14
data-mapper/src/main/java/com/iluwatar/datamapper/App.java
View File

@ -83,11 +83,15 @@ public final class App {
/* Add student in respectibe db */
mapper.insert(student);
if (log.isDebugEnabled()) {
log.debug("App.main(), student : " + student + ", is inserted");
}
/* Find this student */
final Optional<Student> studentToBeFound = mapper.find(student.getStudentId());
if (log.isDebugEnabled()) {
log.debug("App.main(), db find returned : " + studentToBeFound);
log.debug("App.main(), student : " + studentToBeFound + ", is searched");
}
/* Update existing student object */
@ -96,7 +100,15 @@ public final class App {
/* Update student in respectibe db */
mapper.update(student);
if (log.isDebugEnabled()) {
log.debug("App.main(), student : " + student + ", is updated");
}
/* Delete student in db */
if (log.isDebugEnabled()) {
log.debug("App.main(), student : " + student + ", is deleted");
}
mapper.delete(student);
}

23
data-mapper/src/main/java/com/iluwatar/datamapper/StudentMySQLDataMapper.java
View File

@ -18,19 +18,20 @@
*/
package com.iluwatar.datamapper;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
public final class StudentMySQLDataMapper implements StudentDataMapper {
/* Note: Normally this would be in the form of an actual database */
private List<Student> students;
private List<Student> students = new ArrayList<>();
@Override
public final Optional<Student> find(final int studentId) {
/* Compare with existing students */
for (final Student student : this.students) {
for (final Student student : this.getStudents()) {
/* Check if student is found */
if (student.getStudentId() == studentId) {
@ -48,13 +49,13 @@ public final class StudentMySQLDataMapper implements StudentDataMapper {
/* Check with existing students */
if (this.students.contains(studentToBeUpdated)) {
if (this.getStudents().contains(studentToBeUpdated)) {
/* Get the index of student in list */
final int index = this.students.indexOf(studentToBeUpdated);
final int index = this.getStudents().indexOf(studentToBeUpdated);
/* Update the student in list */
this.students.set(index, studentToBeUpdated);
this.getStudents().set(index, studentToBeUpdated);
} else {
@ -67,10 +68,10 @@ public final class StudentMySQLDataMapper implements StudentDataMapper {
public final void insert(final Student studentToBeInserted) throws DataMapperException {
/* Check with existing students */
if (!this.students.contains(studentToBeInserted)) {
if (!this.getStudents().contains(studentToBeInserted)) {
/* Add student in list */
this.students.add(studentToBeInserted);
this.getStudents().add(studentToBeInserted);
} else {
@ -83,10 +84,10 @@ public final class StudentMySQLDataMapper implements StudentDataMapper {
public final void delete(final Student studentToBeDeleted) throws DataMapperException {
/* Check with existing students */
if (this.students.contains(studentToBeDeleted)) {
if (this.getStudents().contains(studentToBeDeleted)) {
/* Delete the student from list */
this.students.remove(studentToBeDeleted);
this.getStudents().remove(studentToBeDeleted);
} else {
@ -94,4 +95,8 @@ public final class StudentMySQLDataMapper implements StudentDataMapper {
throw new DataMapperException("Student [" + studentToBeDeleted.getName() + "] is not found");
}
}
public List<Student> getStudents() {
return this.students;
}
}

23
data-mapper/src/main/java/com/iluwatar/datamapper/StudentOracleDataMapper.java
View File

@ -18,19 +18,20 @@
*/
package com.iluwatar.datamapper;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
public final class StudentOracleDataMapper implements StudentDataMapper {
/* Note: Normally this would be in the form of an actual database */
private List<Student> students;
private List<Student> students = new ArrayList<>();
@Override
public final Optional<Student> find(final int studentId) {
/* Compare with existing students */
for (final Student student : this.students) {
for (final Student student : this.getStudents()) {
/* Check if student is found */
if (student.getStudentId() == studentId) {
@ -48,13 +49,13 @@ public final class StudentOracleDataMapper implements StudentDataMapper {
/* Check with existing students */
if (this.students.contains(studentToBeUpdated)) {
if (this.getStudents().contains(studentToBeUpdated)) {
/* Get the index of student in list */
final int index = this.students.indexOf(studentToBeUpdated);
final int index = this.getStudents().indexOf(studentToBeUpdated);
/* Update the student in list */
this.students.set(index, studentToBeUpdated);
this.getStudents().set(index, studentToBeUpdated);
} else {
@ -67,10 +68,10 @@ public final class StudentOracleDataMapper implements StudentDataMapper {
public final void insert(final Student studentToBeInserted) throws DataMapperException {
/* Check with existing students */
if (!this.students.contains(studentToBeInserted)) {
if (!this.getStudents().contains(studentToBeInserted)) {
/* Add student in list */
this.students.add(studentToBeInserted);
this.getStudents().add(studentToBeInserted);
} else {
@ -83,10 +84,10 @@ public final class StudentOracleDataMapper implements StudentDataMapper {
public final void delete(final Student studentToBeDeleted) throws DataMapperException {
/* Check with existing students */
if (this.students.contains(studentToBeDeleted)) {
if (this.getStudents().contains(studentToBeDeleted)) {
/* Delete the student from list */
this.students.remove(studentToBeDeleted);
this.getStudents().remove(studentToBeDeleted);
} else {
@ -94,4 +95,8 @@ public final class StudentOracleDataMapper implements StudentDataMapper {
throw new DataMapperException("Student [" + studentToBeDeleted.getName() + "] is not found");
}
}
public List<Student> getStudents() {
return this.students;
}
}