root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / layers / layerOperations / InfoByPoint.java @ 20098
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.fmap.layers.layerOperations; |
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import java.awt.Point; |
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import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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import com.hardcode.gdbms.engine.data.driver.DriverException; |
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import com.iver.cit.gvsig.exceptions.layers.LoadLayerException; |
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import com.iver.cit.gvsig.exceptions.visitors.VisitorException; |
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import com.iver.utiles.swing.threads.Cancellable; |
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/**
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* <p>Interface that must be implemented by layers which support the operation "<i>information by point</i>".</p>
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*
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* <p>That operation allows get meta-information from a point and an area around, of a layer.</p>
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*/
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public interface InfoByPoint { |
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/**
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* <p>Executes a consultation about information of a point on the layer.</p>
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*
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* <p>There is an area around the point where will got the information.</p>
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*
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* @param p point where is the consultation
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* @param tolerance permissible margin around the coordinates of the point where the method will got the information. Each
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* singular implementation of this method would use it in a different way. The coordinates also depend on the implementation.
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* @param cancel shared object that determines if this layer can continue being drawn
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*
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* @return an array with XML items that have the information of that point
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*
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* @throws DriverException any exception produced using the driver.
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*/
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public XMLItem[] getInfo(Point p, double tolerance, Cancellable cancel) throws ReadDriverException, VisitorException, LoadLayerException; |
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} |