org.fiolino.common.reflection.AbstractAttributeChooser Maven / Gradle / Ivy

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General structure to easily create dynamic logic via MethodHandles and others.

There is a newer version: 1.0.10

package org.fiolino.common.reflection;

/**
 * Created by Kuli on 6/17/2016.
 */
abstract class AbstractAttributeChooser implements AttributeChooser {

    private abstract static class UnaryOperator extends AbstractAttributeChooser {
        final AttributeChooser assignment;

        UnaryOperator(AttributeChooser assignment) {
            this.assignment = assignment;
        }
    }

    private static class Complement extends UnaryOperator {
        Complement(AttributeChooser assignment) {
            super(assignment);
        }

        @Override
        public boolean accepts(String name, Class type, AnnotationProvider annotationProvider) {
            return !assignment.accepts(name, type, annotationProvider);
        }
    }

    private abstract static class BinaryOperator extends UnaryOperator {
        final AttributeChooser secondAssignment;

        BinaryOperator(AttributeChooser assignment, AttributeChooser secondAssignment) {
            super(assignment);
            this.secondAssignment = secondAssignment;
        }
    }

    private static class Or extends BinaryOperator {
        Or(AttributeChooser assignment, AttributeChooser secondAssignment) {
            super(assignment, secondAssignment);
        }

        @Override
        public boolean accepts(String name, Class type, AnnotationProvider annotationProvider) {
            return assignment.accepts(name, type, annotationProvider) ||
                    secondAssignment.accepts(name, type, annotationProvider);
        }
    }

    private static class And extends BinaryOperator {
        And(AttributeChooser assignment, AttributeChooser secondAssignment) {
            super(assignment, secondAssignment);
        }

        @Override
        public boolean accepts(String name, Class type, AnnotationProvider annotationProvider) {
            return assignment.accepts(name, type, annotationProvider) &&
                    secondAssignment.accepts(name, type, annotationProvider);
        }
    }

    @Override
    public AttributeChooser or(AttributeChooser alternative) {
        return new Or(alternative, this);
    }

    @Override
    public AttributeChooser and(AttributeChooser alternative) {
        return new And(alternative, this);
    }

    @Override
    public AttributeChooser complement() {
        return new Complement(this);
    }
}