001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2023-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.common.io.resource;
019
020import com.google.common.base.Strings;
021import com.google.common.io.ByteSource;
022import com.google.common.io.CharSource;
023import com.google.common.net.MediaType;
024
025import org.jspecify.annotations.Nullable;
026
027import java.net.URI;
028import java.util.Objects;
029
030/** Resource based on String with a given URI and MediaType. */
031public class StringResource2 extends BaseResource implements ReadableButNotWritableResource {
032
033    private final String string;
034
035    public static Resource of(@Nullable String text, MediaType mediaType, URI uri) {
036        return new StringResource2(Strings.nullToEmpty(text), mediaType, uri);
037    }
038
039    private StringResource2(String text, MediaType mediaType, URI uri) {
040        super(uri, mediaType);
041        this.string = Objects.requireNonNull(text, "text");
042        if (!mediaType.charset().isPresent()) {
043            throw new IllegalArgumentException(
044                    "MediaType is missing required charset: " + mediaType);
045        }
046    }
047
048    @Override
049    public ByteSource byteSource() {
050        return charSource().asByteSource(mediaType().charset().get());
051    }
052
053    @Override
054    public CharSource charSource() {
055        return CharSource.wrap(string);
056    }
057}