ImageFileInfoBase.java

/**
 * 画像ファイル情報基本データクラス
 */
package jp.crwdev.app.container;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

import jp.crwdev.app.imagefilter.ImageFilterParam;
import jp.crwdev.app.interfaces.IImageFileInfo;

public abstract class ImageFileInfoBase implements IImageFileInfo {

	/** 個別フィルタパラメータ */
	protected ImageFilterParam mPrivateFilter = new ImageFilterParam();
	/** 画像フォーマット */
	protected String mFormat;
	/** 画像幅 */
	protected int mWidth;
	/** 画像高さ */
	protected int mHeight;
	/** 画像サイズ */
	protected long mSize;
	/** TOCテキスト */
	protected String mTocText = null;
	/** 編集フラグ */
	private boolean mIsModify = false;
	/** 有効フラグ */
	protected boolean mIsEnable = true;
	/** ソート用テキスト */
	protected String mSortText;
	/** 並び順(ソート無効時) */
	protected int mSortOrder = -1;

	/**
	 * 基本データの読み込み
	 * @throws Exception getFullPath(),getInputStream()の実装必須
	 */
	protected void loadBasicParams() throws Exception{
		String suffix = getSuffix(getFullPath());

		mFormat = getFormat(suffix);
		mSize = 0;
		mWidth = 0;
		mHeight = 0;

//		Iterator readers = ImageIO.getImageReadersBySuffix(suffix);
//		if (readers.hasNext()) {
//            ImageReader reader = (ImageReader)readers.next();
//			try {
//				//InputStream in = getInputStream();
//				//ImageInputStream stream = ImageIO.createImageInputStream(in);
//				//reader.setInput(stream);
//				mFormat = getFormat(suffix);
//				//mWidth = reader.getWidth(0);
//				//mHeight = reader.getHeight(0);
//				mSize = 0;//in.available();//stream.length();
//			//} catch (IOException e) {
//			//	throw e;
//			} finally {
//				reader.dispose();
//			}
//		}
//		else{
//			throw new Exception("No image");
//		}

	}

	@Override
	public String getSortString(){
		if(mSortText == null){
			String regex = "(\\d+)";
			Pattern p = Pattern.compile(regex);

			String filename = getFileName();
			Matcher m = p.matcher(filename);
			if(m.find()){
				String value = m.group();
				try{
					value = String.format("%05d", Integer.parseInt(value));
				}catch(Exception e){
				}
				String result = m.replaceFirst(value);
				mSortText = result;
			}
			else{
				mSortText = filename;
			}
		}
		return mSortText;
	}

	@Override
	public ImageFilterParam getFilterParam(){
		return mPrivateFilter;
	}

	@Override
	public void setFilterParam(ImageFilterParam param){
		mPrivateFilter = param;
	}

	@Override
	public String getFormat(){
		return mFormat;
	}

	@Override
	public int getWidth(){
		return mWidth;
	}

	@Override
	public int getHeight(){
		return mHeight;
	}

	@Override
	public long getSize(){
		return mSize;
	}

	@Override
	public boolean isJpeg() {
		return "jpeg".equals(mFormat);
	}

	@Override
	public void update() {
		if(mWidth != 0 && mHeight != 0){
			// 読み込み済み
			return;
		}

		String suffix = getSuffix(getFullPath());

		Iterator<ImageReader> readers = ImageIO.getImageReadersBySuffix(suffix);
		if (readers.hasNext()) {
            ImageReader reader = readers.next();
			try {
				InputStream in = getInputStream();
				ImageInputStream stream = ImageIO.createImageInputStream(in);
				reader.setInput(stream);
				//mFormat = getFormat(suffix);
				mWidth = reader.getWidth(0);
				mHeight = reader.getHeight(0);
				//mSize = 0;//in.available();//stream.length();
			} catch (IOException e) {

			} finally {
				reader.dispose();
			}
		}
	}

	@Override
	public BufferedImage getImage(boolean preview){
		return null;
	}

	@Override
	public void setTocText(String text){
		mTocText = text;
	}

	@Override
	public String getTocText(){
		return mTocText;
	}

	@Override
	public void setEnable(boolean enable){
		mIsEnable = enable;
	}

	@Override
	public boolean isEnable(){
		return mIsEnable;
	}

	@Override
	public void setModify(boolean modify){
		mIsModify = modify;
	}

	@Override
	public boolean isModify(){
		return mIsModify || (mTocText != null && mTocText.length() > 0);
	}

	@Override
	public void setSortOrder(int order){
		mSortOrder = order;
	}

	@Override
	public boolean isBlankPage(){
		return false;
	}

	@Override
	public int getSortOrder(){
		return mSortOrder;
	}

	/**
	 * ファイル名から拡張子を取得
	 * @param fileName
	 * @return "."を含まない拡張子。拡張子が無い場合は入力をそのまま返す
	 */
	protected static String getSuffix(String fileName) {
	    if (fileName == null)
	        return null;
	    fileName = fileName.toLowerCase();
	    int point = fileName.lastIndexOf(".");
	    if (point != -1) {
	        return fileName.substring(point + 1);
	    }
	    return fileName;
	}

	/**
	 * 拡張子からフォーマットを取得
	 * @param suffix
	 * @return "jpeg" or "png" or "gif"
	 */
	protected static String getFormat(String suffix){
		if(suffix.equalsIgnoreCase("jpg")){
			return "jpeg";
		}
		else if(suffix.equalsIgnoreCase("png")){
			return "png";
		}
		else if(suffix.equalsIgnoreCase("gif")){
			return "gif";
		}
		return "jpeg";
	}


}