org.codehaus.mojo.license.header.FileHeaderProcessor Maven / Gradle / Ivy

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package org.codehaus.mojo.license.header;

/*
 * #%L
 * License Maven Plugin
 * %%
 * Copyright (C) 2008 - 2011 CodeLutin, Codehaus, Tony Chemit
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;

import org.codehaus.mojo.license.header.transformer.FileHeaderTransformer;
import org.nuiton.processor.Processor;

/**
 * File header processor.
 *
 * @author tchemit [email protected]
 * @since 1.0
 */
public class FileHeaderProcessor extends Processor {
    /**
     * internal file header filter.
     */
    private final FileHeaderFilter filter;

    public FileHeaderProcessor(FileHeaderFilter filter, FileHeader fileHeader, FileHeaderTransformer transformer) {
        if (filter == null) {
            throw new IllegalStateException("no file header filter set.");
        }
        if (fileHeader == null) {
            throw new IllegalStateException("no file header set.");
        }
        if (transformer == null) {
            throw new IllegalStateException("no file header transformer set.");
        }
        this.filter = filter;
        setInputFilter(filter);
        filter.setFileHeader(fileHeader);
        filter.setTransformer(transformer);
        filter.resetContent();
    }

    public String addHeader(String content) {
        return filter.getTransformer().addHeader(filter.getFullHeaderContent(), content);
    }

    /**
     * @return {@code true} if processed file was touched (says the header was
     * fully found), {@code false} otherwise
     * @see FileHeaderFilter#isTouched()
     */
    public boolean isTouched() {
        return filter.isTouched();
    }

    /**
     * @return {@code true} if processed file was modified (says the header was
     * fully found and content changed), {@code false} otherwise
     * @see FileHeaderFilter#isModified()
     */
    public boolean isModified() {
        return filter.isModified();
    }

    /**
     * @return {@code true} if header of header was detected
     * @see FileHeaderFilter#isDetectHeader()
     */
    public boolean isDetectHeader() {
        return filter.isDetectHeader();
    }

    public synchronized void process(String inputContent, File outputFile, String encoding) throws IOException {

        filter.reset();

        Reader input = new InputStreamReader(new ByteArrayInputStream(inputContent.getBytes(encoding)), encoding);
        try {
            Writer output = new OutputStreamWriter(new FileOutputStream(outputFile), encoding);
            try {
                process(input, output);
            } finally {
                output.close();
            }
        } finally {
            input.close();
        }
    }

    public String getFileHeaderDescription() {
        return filter.getFileHeader().getDescription();
    }

    public void updateDescription(String description) {
        filter.getFileHeader().setDescription(description);
        filter.resetContent();
    }
}