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 * as indicated by the @author tags.
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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package io.undertow.predicate;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import io.undertow.attribute.ExchangeAttribute;
import io.undertow.server.HttpServerExchange;

Returns true if all the provided arguments are equal to each other
Author:Stuart Douglas
/** * Returns true if all the provided arguments are equal to each other * * @author Stuart Douglas */
public class EqualsPredicate implements Predicate { private final ExchangeAttribute[] attributes; EqualsPredicate(final ExchangeAttribute[] attributes) { this.attributes = attributes; } @Override public boolean resolve(final HttpServerExchange value) { if(attributes.length < 2) { return true; } String first = attributes[0].readAttribute(value); for(int i = 1; i < attributes.length; ++i) { String current = attributes[i].readAttribute(value); if(first == null) { if(current != null) { return false; } } else if(current == null) { return false; } else if(!first.equals(current)) { return false; } } return true; } public static class Builder implements PredicateBuilder { @Override public String name() { return "equals"; } @Override public Map<String, Class<?>> parameters() { final Map<String, Class<?>> params = new HashMap<>(); params.put("value", ExchangeAttribute[].class); return params; } @Override public Set<String> requiredParameters() { return Collections.singleton("value"); } @Override public String defaultParameter() { return "value"; } @Override public Predicate build(final Map<String, Object> config) { ExchangeAttribute[] value = (ExchangeAttribute[]) config.get("value"); return new EqualsPredicate(value); } } }