Java tutorial
/* * Copyright (C) 2009 Camptocamp * * This file is part of MapFish Server * * MapFish Server is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * MapFish Server is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with MapFish Server. If not, see <http://www.gnu.org/licenses/>. */ package org.mapfish.print.config.layout; import com.lowagie.text.DocumentException; import com.lowagie.text.Rectangle; import com.lowagie.text.pdf.PdfContentByte; import org.json.JSONException; import org.json.JSONWriter; import org.mapfish.print.*; import org.mapfish.print.map.MapChunkDrawer; import org.mapfish.print.utils.DistanceUnit; import org.mapfish.print.utils.PJsonArray; import org.mapfish.print.utils.PJsonObject; /** * Bean to configure the !map blocks. * <p/> * See http://trac.mapfish.org/trac/mapfish/wiki/PrintModuleServer#Mapblock */ public class MapBlock extends Block { private String height = null; private String width = null; private String absoluteX = null; private String absoluteY = null; private double overviewMap = Double.NaN; /** * Name given in the PDF layer. */ private String name = null; public void render(PJsonObject params, PdfElement target, RenderingContext context) throws DocumentException { final Transformer transformer = createTransformer(context, params); final MapChunkDrawer drawer = new MapChunkDrawer(context.getCustomBlocks(), transformer, overviewMap, params, context, getBackgroundColorVal(context, params), name); if (isAbsolute()) { final int absX = getAbsoluteX(context, params); final int absY = getAbsoluteY(context, params); context.getCustomBlocks().addAbsoluteDrawer(new PDFCustomBlocks.AbsoluteDrawer() { public void render(PdfContentByte dc) { final Rectangle rectangle = new Rectangle(absX, absY - transformer.getPaperH(), absX + transformer.getPaperW(), absY); drawer.render(rectangle, dc); } }); } else { target.add(PDFUtils.createPlaceholderTable(transformer.getPaperW(), transformer.getPaperH(), spacingAfter, drawer, align, context.getCustomBlocks())); } } /** * Creates the transformer in function of the JSON parameters and the block's config */ public Transformer createTransformer(RenderingContext context, PJsonObject params) { Integer dpi = params.optInt("dpi"); if (dpi == null) { dpi = context.getGlobalParams().getInt("dpi"); } if (!context.getConfig().getDpis().contains(dpi)) { throw new InvalidJsonValueException(params, "dpi", dpi); } String units = context.getGlobalParams().getString("units"); final DistanceUnit unitEnum = DistanceUnit.fromString(units); if (unitEnum == null) { throw new RuntimeException("Unknown unit: '" + units + "'"); } final int scale; final float centerX; final float centerY; final int width = getWidth(context, params); final int height = getHeight(context, params); final PJsonArray center = params.optJSONArray("center"); if (center != null) { //normal mode scale = params.getInt("scale"); centerX = center.getFloat(0); centerY = center.getFloat(1); } else { //bbox mode PJsonArray bbox = params.getJSONArray("bbox"); float minX = bbox.getFloat(0); float minY = bbox.getFloat(1); float maxX = bbox.getFloat(2); float maxY = bbox.getFloat(3); if (minX >= maxX) { throw new InvalidValueException("maxX", maxX); } if (minY >= maxY) { throw new InvalidValueException("maxY", maxY); } centerX = (minX + maxX) / 2.0F; centerY = (minY + maxY) / 2.0F; scale = context.getConfig() .getBestScale(Math.max((maxX - minX) / (DistanceUnit.PT.convertTo(width, unitEnum)), (maxY - minY) / (DistanceUnit.PT.convertTo(height, unitEnum)))); } if (!context.getConfig().isScalePresent(scale)) { throw new InvalidJsonValueException(params, "scale", scale); } String srs = null; if (params.optBool("geodetic", false) || context.getGlobalParams().optBool("geodetic", false)) { srs = params.optString("srs"); if (srs == null) { srs = context.getGlobalParams().optString("srs"); } if (srs == null) { throw new RuntimeException("When geodetic is true the srs is value is required"); } } double rotation = params.optFloat("rotation", 0.0F) * Math.PI / 180.0; return new Transformer(centerX, centerY, width, height, scale, dpi, unitEnum, rotation, srs); } public void setHeight(String height) { //this.height = Integer.toString(height);a this.height = height; } public int getHeight(RenderingContext context, PJsonObject params) { return Integer.parseInt(PDFUtils.evalString(context, params, height)); } public void setWidth(String width) { //this.width = Integer.toString(width); this.width = width; } public int getWidth(RenderingContext context, PJsonObject params) { return Integer.parseInt(PDFUtils.evalString(context, params, width)); } public boolean isAbsolute() { return absoluteX != null && absoluteY != null; } public void setAbsoluteX(String absoluteX) { this.absoluteX = absoluteX; } public int getAbsoluteX(RenderingContext context, PJsonObject params) { return Integer.parseInt(PDFUtils.evalString(context, params, absoluteX)); } public void setAbsoluteY(String absoluteY) { this.absoluteY = absoluteY; } public int getAbsoluteY(RenderingContext context, PJsonObject params) { return Integer.parseInt(PDFUtils.evalString(context, params, absoluteY)); } public MapBlock getMap() { return Double.isNaN(overviewMap) ? this : null; } public void printClientConfig(JSONWriter json) throws JSONException { json.object(); int w; try { w = Integer.parseInt(width); } catch (NumberFormatException e) { w = 0; } json.key("width").value(w); int h; try { h = Integer.parseInt(height); } catch (NumberFormatException e) { h = 0; } json.key("height").value(h); json.endObject(); } public void setOverviewMap(double overviewMap) { this.overviewMap = overviewMap; } public void setName(String name) { this.name = name; } public void validate() { super.validate(); if (absoluteX != null ^ absoluteY != null) { if (absoluteX == null) { throw new InvalidValueException("absoluteX", "null"); } else { throw new InvalidValueException("absoluteY", "null"); } } if (width == null) { throw new InvalidValueException("width", null); } if (height == null) { throw new InvalidValueException("width", null); } } }