/**
* Copyright © 2010-2011 Nokia
*
* 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.github.restdriver.matchers;
import java.util.Iterator;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
import com.fasterxml.jackson.databind.JsonNode;
/**
* Matcher to check that a JSON array has a particular value at the specified index.
*/
public final class WithValueAt extends TypeSafeMatcher<JsonNode> {
private final int position;
private final Matcher<?> matcher;
/**
* Create a new instance of this matcher.
*
* @param position The position in the array at which the value is to be evaluated
* @param matcher The matcher to use to evaluate the value
*/
public WithValueAt(int position, Matcher<?> matcher) {
this.position = position;
this.matcher = matcher;
}
@Override
public void describeTo(Description description) {
description.appendText("A JSON array with value at " + position + " which matches: ");
matcher.describeTo(description);
}
@Override
public boolean matchesSafely(JsonNode node) {
if (!node.isArray()) {
return false;
}
Iterator<JsonNode> nodeIterator = node.elements();
int nodeCount = 0;
while (nodeIterator.hasNext()) {
JsonNode currentNode = nodeIterator.next();
if (nodeCount == position) {
return matcher.matches(currentNode.textValue());
}
nodeCount++;
}
return false;
}
}