org.simpleflatmapper.map.getter.ComposedContextualGetterFactory Maven / Gradle / Ivy

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Java library to map flat record - ResultSet, csv - to java object with minimum configuration and low footprint.

There is a newer version: 9.0.2

package org.simpleflatmapper.map.getter;

import org.simpleflatmapper.map.context.MappingContextFactoryBuilder;

import java.lang.reflect.Type;

public class ComposedContextualGetterFactory  implements ContextualGetterFactory {

    private final ContextualGetterFactory[] factories;

    private ComposedContextualGetterFactory(ContextualGetterFactory[] factories) {
        this.factories = factories;
    }

    @Override
    public  ContextualGetter newGetter(Type target, K key, MappingContextFactoryBuilder mappingContextFactoryBuilder, Object... properties) {
        ContextualGetterFactory[] factories = this.factories;

        for(int i = 0; i < factories.length; i++) {
            ContextualGetterFactory factory = factories[i];
            ContextualGetter getter = factory.newGetter(target, key, mappingContextFactoryBuilder, properties);
            if (getter != null) return getter;
        }

        return null;
    }

    public  static  ComposedContextualGetterFactory composed(ContextualGetterFactory cfg1, ContextualGetterFactory cfg2) {
        int size = getSize(cfg1) + getSize(cfg2);
        ContextualGetterFactory[] factories = new ContextualGetterFactory[size];

        int index = 0;

        index = append(factories, 0, cfg1);
        index = append(factories, index, cfg2);

        return new ComposedContextualGetterFactory(factories);

    }

    private static  int append(ContextualGetterFactory[] factories, int from, ContextualGetterFactory cfg) {
        if (cfg instanceof ComposedContextualGetterFactory) {
            ContextualGetterFactory[] fs = ((ComposedContextualGetterFactory)cfg).factories;
            System.arraycopy(fs, 0, factories, from, fs.length);
            return from + fs.length;
        } else {
            factories[from] = cfg;
            return from + 1;
        }
    }

    private static int getSize(ContextualGetterFactory cfg) {
        if (cfg instanceof ComposedContextualGetterFactory) {
            return ((ComposedContextualGetterFactory)cfg).factories.length;
        }
        return 1;
    }
}