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package com.fitbur.bytebuddy.matcher;

import com.fitbur.bytebuddy.description.ByteCodeElement;

/**
 * An element matcher that matches a byte code's element's token against a matcher for such a token.
 *
 * @param  The type of the matched entity.
 * @param  The type of the defined shape of the matched entity.
 */
public class DefinedShapeMatcher, S extends ByteCodeElement.TypeDependant>
        extends ElementMatcher.Junction.AbstractBase {

    /**
     * The matcher to apply onto the defined shape of the matched entity.
     */
    private final ElementMatcher matcher;

    /**
     * Creates a new matcher for a byte code element's defined shape.
     *
     * @param matcher The matcher to apply onto the defined shape of the matched entity.
     */
    public DefinedShapeMatcher(ElementMatcher matcher) {
        this.matcher = matcher;
    }

    @Override
    public boolean matches(T target) {
        return matcher.matches(target.asDefined());
    }

    @Override
    public boolean equals(Object other) {
        return this == other || !(other == null || getClass() != other.getClass())
                && matcher.equals(((DefinedShapeMatcher) other).matcher);
    }

    @Override
    public int hashCode() {
        return matcher.hashCode();
    }

    @Override
    public String toString() {
        return "isDefinedAs(" + matcher + ')';
    }
}