/*
 * Copyright 2019, TeamDev. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.server.event;

import com.google.common.annotations.VisibleForTesting;
import io.spine.annotation.Internal;

import java.util.function.Predicate;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * The predicate that helps finding a function that converts a message field (of the given class)
 * into an enrichment field (of another given class).
 *
 * @see Enricher#functionFor(Class, Class)
 */
@Internal
@VisibleForTesting
public final class SupportsFieldConversion implements Predicate<EnrichmentFunction<?, ?, ?>> {

    private final Class<?> messageFieldClass;
    private final Class<?> enrichmentFieldClass;

    public static SupportsFieldConversion of(Class<?> messageFieldClass,
                                             Class<?> enrichmentFieldClass) {
        return new SupportsFieldConversion(messageFieldClass, enrichmentFieldClass);
    }

    private SupportsFieldConversion(Class<?> messageFieldClass, Class<?> enrichmentFieldClass) {
        this.messageFieldClass = messageFieldClass;
        this.enrichmentFieldClass = enrichmentFieldClass;
    }

    @Override
    public boolean test(EnrichmentFunction<?, ?, ?> input) {
        checkNotNull(input);
        boolean eventClassMatches = messageFieldClass.equals(input.getSourceClass());
        boolean enrichmentClassMatches = enrichmentFieldClass.equals(input.getEnrichmentClass());
        return eventClassMatches && enrichmentClassMatches;
    }

    public final String messageFieldClass() {
        return messageFieldClass.getName();
    }

    public final String enrichmentFieldClass() {
        return enrichmentFieldClass.getName();
    }
}

/*
 * Copyright 2019, TeamDev. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.server.event;

import com.google.common.annotations.VisibleForTesting;
import io.spine.annotation.Internal;

import java.util.function.Predicate;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * The predicate that helps finding a function that converts a message field (of the given class)
 * into an enrichment field (of another given class).
 *
 * @see Enricher#functionFor(Class, Class)
 */
@Internal
@VisibleForTesting
public final class SupportsFieldConversion implements Predicate<EnrichmentFunction<?, ?, ?>> {

    private final Class<?> messageFieldClass;
    private final Class<?> enrichmentFieldClass;

    public static SupportsFieldConversion of(Class<?> messageFieldClass,
                                             Class<?> enrichmentFieldClass) {
        return new SupportsFieldConversion(messageFieldClass, enrichmentFieldClass);
    }

    private SupportsFieldConversion(Class<?> messageFieldClass, Class<?> enrichmentFieldClass) {
        this.messageFieldClass = messageFieldClass;
        this.enrichmentFieldClass = enrichmentFieldClass;
    }

    @Override
    public boolean test(EnrichmentFunction<?, ?, ?> input) {
        checkNotNull(input);
        boolean eventClassMatches = messageFieldClass.equals(input.getSourceClass());
        boolean enrichmentClassMatches = enrichmentFieldClass.equals(input.getEnrichmentClass());
        return eventClassMatches && enrichmentClassMatches;
    }

    /**
     * Obtains the class name of an enriched message field.
     */
    public final String messageFieldClass() {
        return messageFieldClass.getName();
    }

    /**
     * Obtains the class name of the field enrichment.
     */
    public final String enrichmentFieldClass() {
        return enrichmentFieldClass.getName();
    }
}

Document class name accessors