bctwcsmapfunctionality.java

esri的ArcGIS Server超级学习模板程序（for java）

package com.esri.solutions.jitk.web.wcs.data;

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

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

import com.esri.adf.web.data.export.ExportProperties;
import com.esri.solutions.jitk.web.data.IBCTMapFunctionality;
import com.esri.solutions.jitk.web.data.image.JAIBCTProcessor;
import com.esri.solutions.jitk.web.data.image.TintParameters;

public class BCTWCSMapFunctionality extends WCSMapFunctionality implements IBCTMapFunctionality {

	private static final Logger LOG = LogManager.getLogger(BCTWCSMapFunctionality.class);
	
	private byte m_brightness = 0;
	private byte m_contrast = 1;
	private TintParameters m_tint;
	
	public byte getBrightness() {
		return m_brightness;
	}
	
	public void setBrightness(byte brightness) {
		m_brightness = brightness;
	}
	
	public byte getContrast() {
		return m_contrast;
	}
	
	public void setContrast(byte contrast) {
		m_contrast = contrast;
	}
	
	public TintParameters getTint() {
		return m_tint;
	}
	
	public void setTint(TintParameters tint) {
		m_tint = tint;
	}
	
	private InputStream exportImage(InputStream is, String format)  {
		
		if(is != null) {
			JAIBCTProcessor p = new JAIBCTProcessor();
			p.setImageFormat(format);
			p.setImageInputStream(is);
			p.setBrightness(m_brightness);
			p.setContrast(m_contrast);
			p.setTint(m_tint);
		
			try {
				return p.process();
			
			} catch (IOException e) {
				LOG.warn("Unable to export image.", e);
			}
		}
		
		return null;
	}
	
	@Override
	public InputStream exportImage()  {
		return exportImage(super.exportImage(), this.getResource().getWebContext().getWebMap().getImageFormat());
	}
	
	public InputStream export(ExportProperties props) {
		return exportImage(super.export(props), props.getImageFormat());
	}
}