com.speedment.common.injector.internal.Injectable Maven / Gradle / Ivy

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/**
 *
 * Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); You may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.speedment.common.injector.internal;

import java.util.Objects;
import java.util.Optional;
import java.util.function.Supplier;

import static java.lang.String.format;

class Injectable {
    private final Class cls;
    private final Supplier supplier;

    Injectable(Class cls, Supplier supplier) {
        this.cls = cls;
        this.supplier = supplier;
    }

    public Class get() {
        return cls;
    }

    public boolean hasSupplier() {
        return supplier != null;
    }

    public Supplier supplier() {
        return Optional.ofNullable(supplier).orElseThrow(
            () -> new UnsupportedOperationException(format(
                "Injectable %s does not have a supplier.",
                cls.getName()
            ))
        );
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Injectable that = (Injectable) o;
        return cls.equals(that.cls) &&
            Objects.equals(supplier, that.supplier);
    }

    @Override
    public int hashCode() {
        return Objects.hash(cls, supplier);
    }
}