com.github.datalking.common.convert.converter.GenericConverter Maven / Gradle / Ivy

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package com.github.datalking.common.convert.converter;

import com.github.datalking.common.convert.descriptor.TypeDescriptor;
import com.github.datalking.util.Assert;

import java.util.Set;

/**
 * @author yaoo on 5/10/18
 */
public interface GenericConverter {

    Set getConvertibleTypes();

    Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType);

    final class ConvertiblePair {

        private final Class sourceType;

        private final Class targetType;

        public ConvertiblePair(Class sourceType, Class targetType) {
            Assert.notNull(sourceType, "Source type must not be null");
            Assert.notNull(targetType, "Target type must not be null");
            this.sourceType = sourceType;
            this.targetType = targetType;
        }

        public Class getSourceType() {
            return this.sourceType;
        }

        public Class getTargetType() {
            return this.targetType;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }
            if (obj == null || obj.getClass() != ConvertiblePair.class) {
                return false;
            }
            ConvertiblePair other = (ConvertiblePair) obj;
            return this.sourceType.equals(other.sourceType) && this.targetType.equals(other.targetType);
        }

        @Override
        public int hashCode() {
            return this.sourceType.hashCode() * 31 + this.targetType.hashCode();
        }

        @Override
        public String toString() {
            return this.sourceType.getName() + " -> " + this.targetType.getName();
        }
    }

}