org.apache.streams.util.schema.UriUtil.java Source code

Introduction

Here is the source code for org.apache.streams.util.schema.UriUtil.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 *
 *   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 org.apache.streams.util.schema;

import org.apache.commons.lang3.StringUtils;

import java.net.URI;
import java.util.Optional;

/**
 * UriUtil contains methods to assist in resolving URIs and URI fragments.
 */
public class UriUtil {

    public static URI removeFragment(URI id) {
        return URI.create(StringUtils.substringBefore(id.toString(), "#"));
    }

    public static URI removeFile(URI id) {
        return URI.create(StringUtils.substringBeforeLast(id.toString(), "/"));
    }

    /**
     * resolve a remote schema safely.
     * @param absolute root URI
     * @param relativePart relative to root
     * @return URI if resolvable, or Optional.absent()
     */
    public static Optional<URI> safeResolve(URI absolute, String relativePart) {
        if (!absolute.isAbsolute()) {
            return Optional.empty();
        }
        try {
            return Optional.of(absolute.resolve(relativePart));
        } catch (IllegalArgumentException ex) {
            return Optional.empty();
        }
    }

}