org.chimi.s4s.imageprocessor.IM4JavaImageProcessor.java Source code

Introduction

Here is the source code for org.chimi.s4s.imageprocessor.IM4JavaImageProcessor.java

Source

/*
 * Copyright 2002-2011 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.
 */
package org.chimi.s4s.imageprocessor;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.chimi.s4s.fileservice.Size;
import org.chimi.s4s.util.Util;
import org.im4java.core.ConvertCmd;
import org.im4java.core.IM4JavaException;
import org.im4java.core.IMOperation;
import org.im4java.process.Pipe;
import org.im4java.process.ProcessStarter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;

/**
 * IM4Java ? ? 
 * 
 * @author Choi Beom Kyun
 * 
 */
public class IM4JavaImageProcessor implements ImageProcessor, InitializingBean {
    private Logger logger = LoggerFactory.getLogger(getClass());

    private String programPath;

    public void setProgramPath(String programPath) {
        this.programPath = programPath;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        if (programPath == null || programPath.isEmpty()) {
            if (logger.isInfoEnabled()) {
                logger.info("IM4Java program path value is not set.");
            }
            return;
        }
        if (logger.isInfoEnabled()) {
            logger.info("IM4Java program path value is {}.", programPath);
        }
        ProcessStarter.setGlobalSearchPath(programPath);
    }

    @Override
    public File resize(InputStream in, File destFile, Size newSize) throws ImageProcessingException {
        try {
            IMOperation op = new IMOperation();
            op.format("jpeg");
            op.addImage("-"); // read from stdin
            if (newSize.getHeight() == 0 || newSize.getWidth() == 0) {
                op.resize(newSize.getWidth(), newSize.getHeight());
            } else {
                op.resize(newSize.getWidth(), newSize.getHeight(), "!");
            }
            op.addImage(destFile.getAbsolutePath());
            Pipe pipeIn = new Pipe(in, null);

            // set up command
            ConvertCmd convert = new ConvertCmd(true);
            convert.setInputProvider(pipeIn);
            try {
                convert.run(op);
                if (logger.isDebugEnabled()) {
                    logger.debug("Thumbnail Image {} created", destFile.getAbsolutePath());
                }
                return destFile;
            } catch (InterruptedException e) {
                throw new ImageProcessingException("Fail to resize:" + e.getMessage(), e);
            } catch (IM4JavaException e) {
                throw new ImageProcessingException("Fail to resize:" + e.getMessage(), e);
            } catch (IOException e) {
                throw new ImageProcessingException("Fail to resize:" + e.getMessage(), e);
            }
        } finally {
            Util.close(in);
        }
    }

}