com.fluxtion.agrona.generation.StringWriterOutputManager Maven / Gradle / Ivy

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/*
 * Copyright 2014-2024 Real Logic Limited.
 *
 * 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
 *
 * https://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 com.fluxtion.agrona.generation;

import java.io.FilterWriter;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;

/**
 * An {@link OutputManager} which can store source files as {@link StringWriter} buy source file name.
 */
public class StringWriterOutputManager implements DynamicPackageOutputManager
{
    private String packageName;
    private String initialPackageName;
    private final HashMap sourceFileByName = new HashMap<>();

    /**
     * {@inheritDoc}
     */
    public Writer createOutput(final String name)
    {
        final StringWriter stringWriter = new StringWriter();
        sourceFileByName.put(packageName + "." + name, stringWriter);

        return new FilterWriter(stringWriter)
        {
            public void close() throws IOException
            {
                super.close();

                if (null != initialPackageName)
                {
                    packageName = initialPackageName;
                }
            }
        };
    }

    /**
     * Set the package name to be used for source files.
     *
     * @param packageName to be used for source files.
     */
    public void setPackageName(final String packageName)
    {
        this.packageName = packageName;
        if (null == initialPackageName)
        {
            initialPackageName = packageName;
        }
    }

    /**
     * Get a {@link CharSequence} which represents the source file.
     *
     * @param name of the source file.
     * @return {@link CharSequence} which represents the source file.
     */
    public CharSequence getSource(final String name)
    {
        final StringWriter stringWriter = sourceFileByName.get(name);
        if (null == stringWriter)
        {
            throw new IllegalArgumentException("unknown source file name: " + name);
        }

        return stringWriter.toString();
    }

    /**
     * Get a {@link Map} of all source files.
     *
     * @return a {@link Map} of all source files.
     */
    public Map getSources()
    {
        final HashMap sources = new HashMap<>();
        for (final Map.Entry entry : sourceFileByName.entrySet())
        {
            sources.put(entry.getKey(), entry.getValue().toString());
        }

        return sources;
    }

    /**
     * Clear all source files in this {@link OutputManager} and reset the initial package name.
     */
    public void clear()
    {
        initialPackageName = null;
        packageName = "";
        sourceFileByName.clear();
    }
}