com.google.inject.internal.ProcessedBindingData Maven / Gradle / Ivy

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package com.google.inject.internal;

import com.google.common.collect.Lists;

import java.util.List;

/**
 * Keeps track of creation listeners & uninitialized bindings,
 * so they can be processed after bindings are recorded.
 */
class ProcessedBindingData {

    private final List creationListeners = Lists.newArrayList();

    private final List uninitializedBindings = Lists.newArrayList();

    private final List delayedUninitializedBindings = Lists.newArrayList();

    void addCreationListener(CreationListener listener) {
        creationListeners.add(listener);
    }

    void addUninitializedBinding(Runnable runnable) {
        uninitializedBindings.add(runnable);
    }

    void addDelayedUninitializedBinding(Runnable runnable) {
        delayedUninitializedBindings.add(runnable);
    }

    void initializeBindings() {
        for (Runnable initializer : uninitializedBindings) {
            initializer.run();
        }
    }

    void runCreationListeners(Errors errors) {
        for (CreationListener creationListener : creationListeners) {
            creationListener.notify(errors);
        }
    }

    /**
     * Initialized bindings that need to be delayed until after all injection points and other
     * bindings are processed. The main current usecase for this is resolving Optional dependencies
     * for OptionalBinder bindings.
     */
    void initializeDelayedBindings() {
        for (Runnable initializer : delayedUninitializedBindings) {
            initializer.run();
        }
    }
}