// **********************************************************************
//
// <copyright>
//
// BBN Technologies
// 10 Moulton Street
// Cambridge, MA 02138
// (617) 873-8000
//
// Copyright (C) BBNT Solutions LLC. All rights reserved.
//
// </copyright>
// **********************************************************************
//
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/mif/MIFLayer.java,v $
// $RCSfile: MIFLayer.java,v $
// $Revision: 1.8.2.2 $
// $Date: 2005/05/24 18:38:27 $
// $Author: dietrick $
//
// **********************************************************************
package com.bbn.openmap.layer.mif;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.Properties;
import com.bbn.openmap.layer.OMGraphicHandlerLayer;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.util.Debug;
import com.bbn.openmap.util.PropUtils;
/**
* An OpenMap Layer that displays MapInfo Interchange Format (MIF)
* files Currently only a subset of the possible MIF options is
* supported. Specifically the PLine and Region options with their
* associated parameters however maps will be reproduced exactly as
* they appear in the MapInfo Professional product.
*
* 26th January 2004 - added support for TEXT and POINT
*/
public class MIFLayer extends OMGraphicHandlerLayer {
public final static String MIF_FileProperty = "mifFile";
public final static String textVisibleProperty = "textVisible";
public final static String pointVisibleProperty = "pointVisible";
boolean accurate = true;
MIFLoader mifl = null;
public MIFLayer() {
setProjectionChangePolicy(new com.bbn.openmap.layer.policy.ListResetPCPolicy(this));
}
/**
* Initializes this layer from the given properties.
*
* @param props the <code>Properties</code> holding settings for
* this layer. Only the file property is used by the layer.
* This is the MIF file that we will decode.
*/
public void setProperties(String prefix, Properties props) {
super.setProperties(prefix, props);
prefix = PropUtils.getScopedPropertyPrefix(prefix);
String mifFileName = props.getProperty(prefix + MIF_FileProperty);
float textVisible = PropUtils.floatFromProperties(props, prefix
+ textVisibleProperty, -1f);
float pointVisible = PropUtils.floatFromProperties(props, prefix
+ pointVisibleProperty, -1f);
try {
URL fileURL = PropUtils.getResourceOrFileOrURL(null, mifFileName);
BufferedReader bfr = new BufferedReader(new InputStreamReader(fileURL
.openStream()));
mifl = new MIFLoader(bfr, accurate, textVisible, pointVisible);
} catch (IOException ioe) {
Debug.error("MIFLayer: didn't find file " + mifFileName);
return;
}
}
/**
* Sets the accuracy of the rendering. The default is true. If set
* to false then the regions will not always be drawn correctly
* (ie. as they appear in MapInfo) however processing will be much
* faster. This option effects the drawing of Regions which can
* have nested regions. Nested regions appear as holes in the
* outer region and it is this that can take a lot of processing
* time. Usually something like a street layout will take much
* more time to draw. The more holes then the longer it takes. By
* setting accuracy to false the regions are drawn as lines
* instead of filled which is much faster.
*/
public void setAccuracy(boolean accurate) {
this.accurate = accurate;
}
/**
* OMGraphicHandlerLayer method for gathering data.
*/
public synchronized OMGraphicList prepare() {
if (mifl != null) {
OMGraphicList list = mifl.getList();
if (list != null) {
list.generate(getProjection());
}
return list;
} else {
return new OMGraphicList();
}
}
}
/* Last line of file */