Application: gvSIG desktop

package org.gvsig.basicformats.impl;

import java.io.File;

import java.io.IOException;

import org.apache.commons.io.FileUtils;

import org.apache.commons.io.FilenameUtils;

import org.apache.commons.lang3.StringUtils;

import org.cresques.cts.ICRSFactory;

import org.cresques.cts.IProjection;

import org.gvsig.basicformats.PRJFile;

import org.gvsig.fmap.crs.CRSFactory;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class DefaultPRJFile implements PRJFile {

    private static final Logger logger = LoggerFactory.getLogger(DefaultPRJFile.class);

    private File source;

    private IProjection crs;

    public DefaultPRJFile() {

        this.source = null;

        this.crs = null;        

    }

    @Override

    public File getFile(File file) {

        File f = new File(FilenameUtils.removeExtension(file.getAbsolutePath())+"."+FILE_EXTENSION);

        return f;

    }

    @Override

    public File getFile() {

        return source;

    }

    @Override

    public IProjection getCRS() {

        return this.crs;

    }

    @Override

    public void setCRS(IProjection crs) {

        this.crs = crs;

    }

    @Override

    public void read(File file) throws IOException {

        File f = this.getFile(file);

        if (f.exists()) {

            try {

                String theContents = FileUtils.readFileToString(f);

                if (StringUtils.isNotEmpty(theContents)){

                    IProjection theCrs=CRSFactory.getCRSFactory().get(ICRSFactory.FORMAT_WKT_ESRI, theContents);

                    this.crs = theCrs;

                    this.source = f.getAbsoluteFile();

                }

            } catch (IOException e) {

                logger.warn("Couldn't read "+FILE_EXTENSION+" file ("+f.getAbsolutePath()+").",e);

                throw e;

            }

        }

    }

    @Override

    public void write(File file) throws IOException {

        File f = this.getFile(file);

        try {

            String export = crs.export(ICRSFactory.FORMAT_WKT_ESRI);

            if(export!=null){

                FileUtils.writeStringToFile(f, export);

                this.source = f;

            }

        } catch (Exception e) {

            logger.warn("Couldn't write "+FILE_EXTENSION+" file ("+f.getAbsolutePath()+").",e);

            throw e;

        }

    }

}