TestJavaFileObject.java

/*
 * Copyright 2008-2017 the original author or authors.
 *
 * 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.
 */
/*

Copyright 2008-2014 TOPdesk, the Netherlands

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 org.kordamp.jipsy.processor.testutils;

import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public final class TestJavaFileObject extends SimpleJavaFileObject {

    public static final JavaFileObject HELLO_WORLD = create("HelloWorld", "public class HelloWorld {\n\tpublic static final void main(String[] args) {\n\t\tSystem.out.println(\"Hello World!\");\n\t}\n}");
    public static final Iterable<JavaFileObject> ONLY_HELLO_WORLD = Collections.singleton(HELLO_WORLD);

    private final CharSequence programText;

    private TestJavaFileObject(String className, CharSequence programText) {
        super(uri(className), Kind.SOURCE);
        this.programText = programText;
    }

    @Override
    public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
        return programText;
    }

    private static URI uri(String className) {
        try {
            return new URI(className + ".java");
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }
    }

    public static JavaFileObject create(String className, String content) {
        return new TestJavaFileObject(className, content);
    }

    public static Iterable<? extends JavaFileObject> read(String prefix, FileType type, String... names) throws IOException {
        List<JavaFileObject> result = new ArrayList<JavaFileObject>();
        for (String name : names) {
            result.add(new TestJavaFileObject(name, readFile(prefix, type, name)));
        }
        return result;
    }

    private static CharSequence readFile(String prefix, FileType type, String name) throws IOException {
        BufferedReader reader = new BufferedReader(
            new InputStreamReader(TestJavaFileObject.class.getClassLoader().getResourceAsStream(
                prefix + "/" + type.getLocation() + "/" + name + ".java")));
        StringBuilder result = new StringBuilder();
        try {
            String line;
            while ((line = reader.readLine()) != null) {
                result.append(line).append("\n");
            }
        } finally {
            reader.close();
        }
        return result;
    }
}