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A library to query and verify JSON
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/*
BSD License

Copyright (c) 2000-2006, www.hamcrest.org
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or promote products derived from this software without specific prior written
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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,
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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*/
package com.jayway.jsonassert.impl.matcher;

import org.hamcrest.Description;
import org.hamcrest.Matcher;

import java.util.Collection;

import static org.hamcrest.core.IsEqual.equalTo;

/**
 * Matches if collection size satisfies a nested matcher.
 */
public class IsCollectionWithSize extends CollectionMatcher> {
    private final Matcher sizeMatcher;

    public IsCollectionWithSize(Matcher sizeMatcher) {
        this.sizeMatcher = sizeMatcher;
    }

    @Override
    public boolean matchesSafely(Collection item) {
        return sizeMatcher.matches(item.size());
    }

    @Override
    public void describeTo(Description description) {
        description.appendText("a collection with size ")
            .appendDescriptionOf(sizeMatcher);
    }

    /**
     * Does collection size satisfy a given matcher?
     */
    public static  Matcher> hasSize(Matcher size) {
        return new IsCollectionWithSize(size);
    }

    /**
     * This is a shortcut to the frequently used hasSize(equalTo(x)).
     *
     * For example,  assertThat(hasSize(equal_to(x)))
     *          vs.  assertThat(hasSize(x))
     */
    public static  Matcher> hasSize(int size) {
        Matcher matcher = equalTo(size);
        return IsCollectionWithSize.hasSize(matcher);
    }
}