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 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2023 Objectionary.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
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 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.eolang;

/**
 * This attribute encapsulates \phi and resets its owner
 * when it's being put().
 *
 * This class is thread-safe.
 *
 * @since 0.22
 */
final class AtPhiSensitive implements Attr {

    /**
     * The \phi attribute.
     */
    private final Attr origin;

    /**
     * The cache.
     */
    private final CachedPhi cached;

    /**
     * Ctor.
     * @param aphi The \origin object
     * @param cache The owner of \origin
     */
    AtPhiSensitive(final Attr aphi, final CachedPhi cache) {
        this.origin = aphi;
        this.cached = cache;
    }

    @Override
    public String toString() {
        return this.origin.toString();
    }

    @Override
    public String φTerm() {
        return this.origin.φTerm();
    }

    @Override
    public Attr copy(final Phi obj) {
        return new AtPhiSensitive(this.origin.copy(obj), this.cached);
    }

    @Override
    public Phi get() {
        return this.origin.get();
    }

    @Override
    public void put(final Phi obj) {
        synchronized (this.origin) {
            this.origin.put(obj);
            this.cached.reset();
        }
    }
}
