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A library to query and verify JSON

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/*
BSD License

Copyright (c) 2000-2006, www.hamcrest.org
All rights reserved.

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modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of
conditions and the following disclaimer. Redistributions in binary form must reproduce
the above copyright notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.

Neither the name of Hamcrest nor the names of its contributors may be used to endorse
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.Map;

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

public class IsMapContainingValue extends MapTypeSafeMatcher>{
    private final Matcher valueMatcher;

    public IsMapContainingValue(Matcher valueMatcher) {
        this.valueMatcher = valueMatcher;
    }

    @Override
    public boolean matchesSafely(Map item) {
        for (V value : item.values()) {
            if (valueMatcher.matches(value)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText("map with value ")
                   .appendDescriptionOf(valueMatcher);
    }

    public static  Matcher> hasValue(V value) {
        return IsMapContainingValue.hasValue(equalTo(value));
    }

    public static  Matcher> hasValue(Matcher valueMatcher) {
        return new IsMapContainingValue(valueMatcher);
    }
}