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 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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
 *
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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package io.undertow.predicate;

import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

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

Returns true if the request header is present and contains one of the strings to match.
Author:Stuart Douglas
/** * Returns true if the request header is present and contains one of the strings to match. * * @author Stuart Douglas */
public class ContainsPredicate implements Predicate { private final ExchangeAttribute attribute; private final String[] values; ContainsPredicate(final ExchangeAttribute attribute, final String[] values) { this.attribute = attribute; this.values = new String[values.length]; System.arraycopy(values, 0, this.values, 0, values.length); } @Override public boolean resolve(final HttpServerExchange value) { String attr = attribute.readAttribute(value); if (attr == null) { return false; } for (int i = 0; i < values.length; ++i) { if (attr.contains(values[i])) { return true; } } return false; } public ExchangeAttribute getAttribute() { return attribute; } public String[] getValues() { String[] ret = new String[values.length]; System.arraycopy(values, 0, ret, 0, values.length); return ret; } @Override public String toString() { return "contains( search={" + String.join(", ", Arrays.asList( values ) ) + "}, value='" + attribute.toString() + "' )"; } public static class Builder implements PredicateBuilder { @Override public String name() { return "contains"; } @Override public Map<String, Class<?>> parameters() { final Map<String, Class<?>> params = new HashMap<>(); params.put("value", ExchangeAttribute.class); params.put("search", String[].class); return params; } @Override public Set<String> requiredParameters() { final Set<String> params = new HashSet<>(); params.add("value"); params.add("search"); return params; } @Override public String defaultParameter() { return null; } @Override public Predicate build(final Map<String, Object> config) { String[] search = (String[]) config.get("search"); ExchangeAttribute values = (ExchangeAttribute) config.get("value"); return new ContainsPredicate(values, search); } } }