io.virtdata.core.ContextualArrayBindings Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of virtdata-lib-realer Show documentation

With inspiration from other libraries

There is a newer version: 2.12.15

package io.virtdata.core;

import io.virtdata.api.ValuesArrayBinder;
import io.virtdata.api.Binder;

/**
 * A thread-local template that describes a set of data mappers, a context object,
 * and a method for applying mapped values to the context object via an object array.
 * This type is used in thread-local scope to map thread-specific
 * data mapper instances to a contextual template object and a method for
 * applying mapped values to it.
 *
 * This type is generally constructed by a ContextualBindingsTemplate.
 *
 * @param  The type of the contextual template object.
 * @param  The resulting type from binding mapped values with the contextual template C
 */
public class ContextualArrayBindings implements Binder {

    private final C context;
    private Bindings bindings;
    private ValuesArrayBinder valuesArrayBinder;

    public ContextualArrayBindings(Bindings bindings, C context, ValuesArrayBinder valuesArrayBinder) {
        this.bindings = bindings;
        this.context = context;
        this.valuesArrayBinder = valuesArrayBinder;
    }

    public Bindings getBindings() {
        return bindings;
    }

    public C getContext() {
        return context;
    }

    @Override
    public R bind(long value) {
        Object[] allGeneratedValues = bindings.getAll(value);
        try { // Provide bindings context data where it may be useful
            return valuesArrayBinder.bindValues(context, allGeneratedValues);
        } catch (Exception e) {
            throw new RuntimeException("Binding error:" + bindings.getTemplate().toString(allGeneratedValues), e);
        }

    }
}