ImageData.java

/**
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package org.mifosplatform.infrastructure.documentmanagement.data;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.imageio.ImageIO;

import org.apache.commons.lang.StringUtils;
import org.apache.poi.util.IOUtils;
import org.mifosplatform.infrastructure.documentmanagement.contentrepository.ContentRepositoryUtils;
import org.mifosplatform.infrastructure.documentmanagement.domain.StorageType;

public class ImageData {

    @SuppressWarnings("unused")
    private final Long imageId;
    private final String location;
    private final Integer storageType;
    private final String entityDisplayName;

    private File file;
    private ContentRepositoryUtils.IMAGE_FILE_EXTENSION fileExtension;
    private InputStream inputStream;

    public ImageData(final Long imageId, final String location, final Integer storageType, final String entityDisplayName) {
        this.imageId = imageId;
        this.location = location;
        this.storageType = storageType;
        this.entityDisplayName = entityDisplayName;
    }

    public byte[] getContent() {
        // TODO Vishwas Fix error handling
        try {
            if (this.inputStream == null) {
                final FileInputStream fileInputStream = new FileInputStream(this.file);
                return IOUtils.toByteArray(fileInputStream);
            }

            return IOUtils.toByteArray(this.inputStream);
        } catch (final IOException e) {
            return null;
        }
    }

    public byte[] resizeImage(InputStream in, int maxWidth, int maxHeight) throws IOException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        resizeImage(in, out, maxWidth, maxHeight);
        return out.toByteArray();
    }

    public void resizeImage(InputStream in, OutputStream out, int maxWidth, int maxHeight) throws IOException {

        BufferedImage src = ImageIO.read(in);
        if (src.getWidth() <= maxWidth && src.getHeight() <= maxHeight) {
            out.write(getContent());
            return;
        }
        float widthRatio = (float) src.getWidth() / maxWidth;
        float heightRatio = (float) src.getHeight() / maxHeight;
        float scaleRatio = widthRatio > heightRatio ? widthRatio : heightRatio;

        // TODO(lindahl): Improve compressed image quality (perhaps quality
        // ratio)

        int newWidth = (int) (src.getWidth() / scaleRatio);
        int newHeight = (int) (src.getHeight() / scaleRatio);
        int colorModel = fileExtension == ContentRepositoryUtils.IMAGE_FILE_EXTENSION.JPEG ? BufferedImage.TYPE_INT_RGB
                : BufferedImage.TYPE_INT_ARGB;
        BufferedImage target = new BufferedImage(newWidth, newHeight, colorModel);
        Graphics2D g = target.createGraphics();
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g.drawImage(src, 0, 0, newWidth, newHeight, Color.BLACK, null);
        g.dispose();
        ImageIO.write(target, fileExtension != null ? fileExtension.getValueWithoutDot() : "jpeg", out);
    }

    public byte[] getContentOfSize(Integer maxWidth, Integer maxHeight) {
        if (maxWidth == null && maxHeight == null) { return getContent(); }
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(this.file);
            byte[] out = resizeImage(fis, maxWidth != null ? maxWidth : Integer.MAX_VALUE, maxHeight != null ? maxHeight
                    : Integer.MAX_VALUE);
            return out;
        } catch (IOException ex) {
            return null;
        } finally {
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException ex) {}
            }
        }
    }

    private void setImageContentType(String filename) {
        fileExtension = ContentRepositoryUtils.IMAGE_FILE_EXTENSION.JPEG;

        if (StringUtils.endsWith(filename.toLowerCase(), ContentRepositoryUtils.IMAGE_FILE_EXTENSION.GIF.getValue())) {
            fileExtension = ContentRepositoryUtils.IMAGE_FILE_EXTENSION.GIF;
        } else if (StringUtils.endsWith(filename, ContentRepositoryUtils.IMAGE_FILE_EXTENSION.PNG.getValue())) {
            fileExtension = ContentRepositoryUtils.IMAGE_FILE_EXTENSION.PNG;
        }
    }

    public void updateContent(final File file) {
        this.file = file;
        if (this.file != null) {
            setImageContentType(this.file.getName());
        }
    }

    public String contentType() {
        return ContentRepositoryUtils.IMAGE_MIME_TYPE.fromFileExtension(this.fileExtension).getValue();
    }

    public StorageType storageType() {
        return StorageType.fromInt(this.storageType);
    }

    public String name() {
        return this.file.getName();
    }

    public String location() {
        return this.location;
    }

    public void updateContent(final InputStream objectContent) {
        this.inputStream = objectContent;
    }

    public String getEntityDisplayName() {
        return this.entityDisplayName;
    }

}