technology/java-spring-boot/src/main/java/org/acme/schooltimetabling/solver/TimeTableConstraintProvider.java [73:86]:
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    Constraint teacherTimeEfficiency(ConstraintFactory constraintFactory) {
        // A teacher prefers to teach sequential lessons and dislikes gaps between lessons.
        return constraintFactory
                .forEach(Lesson.class)
                .join(Lesson.class, Joiners.equal(Lesson::getTeacher),
                        Joiners.equal((lesson) -> lesson.getTimeslot().getDayOfWeek()))
                .filter((lesson1, lesson2) -> {
                    Duration between = Duration.between(lesson1.getTimeslot().getEndTime(),
                            lesson2.getTimeslot().getStartTime());
                    return !between.isNegative() && between.compareTo(Duration.ofMinutes(30)) <= 0;
                })
                .reward(HardSoftScore.ONE_SOFT)
                .asConstraint("Teacher time efficiency");
    }
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technology/kubernetes/common/src/main/java/org/acme/common/solver/TimeTableConstraintProvider.java [72:85]:
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    Constraint teacherTimeEfficiency(ConstraintFactory constraintFactory) {
        // A teacher prefers to teach sequential lessons and dislikes gaps between lessons.
        return constraintFactory
                .forEach(Lesson.class)
                .join(Lesson.class, Joiners.equal(Lesson::getTeacher),
                        Joiners.equal((lesson) -> lesson.getTimeslot().getDayOfWeek()))
                .filter((lesson1, lesson2) -> {
                    Duration between = Duration.between(lesson1.getTimeslot().getEndTime(),
                            lesson2.getTimeslot().getStartTime());
                    return !between.isNegative() && between.compareTo(Duration.ofMinutes(30)) <= 0;
                })
                .reward(HardSoftScore.ONE_SOFT)
                .asConstraint("Teacher time efficiency");
    }
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technology/java-activemq-quarkus/solver/src/main/java/org/acme/schooltimetabling/solver/TimeTableConstraintProvider.java [72:85]:
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    Constraint teacherTimeEfficiency(ConstraintFactory constraintFactory) {
        // A teacher prefers to teach sequential lessons and dislikes gaps between lessons.
        return constraintFactory
                .forEach(Lesson.class)
                .join(Lesson.class, Joiners.equal(Lesson::getTeacher),
                        Joiners.equal((lesson) -> lesson.getTimeslot().getDayOfWeek()))
                .filter((lesson1, lesson2) -> {
                    Duration between = Duration.between(lesson1.getTimeslot().getEndTime(),
                            lesson2.getTimeslot().getStartTime());
                    return !between.isNegative() && between.compareTo(Duration.ofMinutes(30)) <= 0;
                })
                .reward(HardSoftScore.ONE_SOFT)
                .asConstraint("Teacher time efficiency");
    }
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use-cases/school-timetabling/src/main/java/org/acme/schooltimetabling/solver/TimeTableConstraintProvider.java [72:85]:
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    Constraint teacherTimeEfficiency(ConstraintFactory constraintFactory) {
        // A teacher prefers to teach sequential lessons and dislikes gaps between lessons.
        return constraintFactory
                .forEach(Lesson.class)
                .join(Lesson.class, Joiners.equal(Lesson::getTeacher),
                        Joiners.equal((lesson) -> lesson.getTimeslot().getDayOfWeek()))
                .filter((lesson1, lesson2) -> {
                    Duration between = Duration.between(lesson1.getTimeslot().getEndTime(),
                            lesson2.getTimeslot().getStartTime());
                    return !between.isNegative() && between.compareTo(Duration.ofMinutes(30)) <= 0;
                })
                .reward(HardSoftScore.ONE_SOFT)
                .asConstraint("Teacher time efficiency");
    }
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hello-world/src/main/java/org/acme/schooltimetabling/solver/TimeTableConstraintProvider.java [72:85]:
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    Constraint teacherTimeEfficiency(ConstraintFactory constraintFactory) {
        // A teacher prefers to teach sequential lessons and dislikes gaps between lessons.
        return constraintFactory
                .forEach(Lesson.class)
                .join(Lesson.class, Joiners.equal(Lesson::getTeacher),
                        Joiners.equal((lesson) -> lesson.getTimeslot().getDayOfWeek()))
                .filter((lesson1, lesson2) -> {
                    Duration between = Duration.between(lesson1.getTimeslot().getEndTime(),
                            lesson2.getTimeslot().getStartTime());
                    return !between.isNegative() && between.compareTo(Duration.ofMinutes(30)) <= 0;
                })
                .reward(HardSoftScore.ONE_SOFT)
                .asConstraint("Teacher time efficiency");
    }
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