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Diffstat (limited to 'src/java/org/apache/fop/apps/FopConfParser.java')
| -rw-r--r-- | src/java/org/apache/fop/apps/FopConfParser.java | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/apps/FopConfParser.java b/src/java/org/apache/fop/apps/FopConfParser.java new file mode 100644 index 000000000..4ab788701 --- /dev/null +++ b/src/java/org/apache/fop/apps/FopConfParser.java @@ -0,0 +1,359 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* $Id$ */ + +package org.apache.fop.apps; + +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.net.URI; +import java.net.URISyntaxException; +import java.util.HashMap; +import java.util.Map; + +import org.xml.sax.SAXException; + +import org.apache.avalon.framework.configuration.Configuration; +import org.apache.avalon.framework.configuration.ConfigurationException; +import org.apache.avalon.framework.configuration.DefaultConfigurationBuilder; +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; + +import org.apache.xmlgraphics.image.loader.spi.ImageImplRegistry; +import org.apache.xmlgraphics.image.loader.util.Penalty; + +import org.apache.fop.apps.io.DefaultResourceResolver; +import org.apache.fop.apps.io.ResourceResolver; +import org.apache.fop.apps.io.URIResolverWrapper; +import org.apache.fop.fonts.FontManagerConfigurator; +import org.apache.fop.hyphenation.HyphenationTreeCache; +import org.apache.fop.util.LogUtil; + +/** + * Parses the FOP configuration file and returns a {@link FopFactoryBuilder} which builds a + * {@link FopFactory}. + */ +public class FopConfParser { + + private static final String PREFER_RENDERER = "prefer-renderer"; + + private final Log log = LogFactory.getLog(FopConfParser.class); + + private final FopFactoryBuilder fopFactoryBuilder; + + /** + * Constructor that takes the FOP conf in the form of an {@link InputStream}. A default base URI + * must be given as a fall-back mechanism for URI resolution. + * + * @param fopConfStream the fop conf input stream + * @param enviro the profile of the FOP deployment environment + * @throws SAXException if a SAX error was thrown parsing the FOP conf + * @throws IOException if an I/O error is thrown while parsing the FOP conf + */ + public FopConfParser(InputStream fopConfStream, EnvironmentProfile enviro) + throws SAXException, IOException { + DefaultConfigurationBuilder cfgBuilder = new DefaultConfigurationBuilder(); + Configuration cfg; + try { + cfg = cfgBuilder.build(fopConfStream); + } catch (ConfigurationException e) { + throw new FOPException(e); + } + // The default base URI is taken from the directory in which the fopConf resides + fopFactoryBuilder = new FopFactoryBuilder(enviro).setConfiguration(cfg); + configure(enviro.getDefaultBaseURI(), enviro.getResourceResolver(), cfg); + } + + /** + * Constructor that takes the FOP conf in the form of an {@link InputStream}. A default base URI + * must be given as a fall-back mechanism for URI resolution. + * + * @param fopConfStream the fop conf input stream + * @param defaultBaseURI the default base URI + * @param resolver the URI resolver + * @throws SAXException if a SAX error was thrown parsing the FOP conf + * @throws IOException if an I/O error is thrown while parsing the FOP conf + */ + public FopConfParser(InputStream fopConfStream, URI defaultBaseURI, + ResourceResolver resolver) throws SAXException, IOException { + this(fopConfStream, EnvironmentalProfileFactory.createDefault(defaultBaseURI, resolver)); + } + + /** + * Constructor that takes the FOP conf in the form of an {@link InputStream}. A default base URI + * must be given as a fall-back mechanism for URI resolution. The default URI resolvers is used. + * + * @param fopConfStream the fop conf input stream + * @param defaultBaseURI the default base URI + * @throws SAXException if a SAX error was thrown parsing the FOP conf + * @throws IOException if an I/O error is thrown while parsing the FOP conf + */ + public FopConfParser(InputStream fopConfStream, URI defaultBaseURI) throws SAXException, + IOException { + this(fopConfStream, defaultBaseURI, new DefaultResourceResolver()); + } + + /** + * Constructor that takes the FOP conf and uses the default URI resolver. + * + * @param fopConfFile the FOP conf file + * @throws SAXException if a SAX error was thrown parsing the FOP conf + * @throws IOException if an I/O error is thrown while parsing the FOP conf + */ + public FopConfParser(File fopConfFile) throws SAXException, IOException { + this(fopConfFile, new DefaultResourceResolver()); + } + + /** + * Constructor that parses the FOP conf and uses the URI resolver given. + * + * @param fopConfFile the FOP conf file + * @param resolver the URI resolver + * @throws SAXException if a SAX error was thrown parsing the FOP conf + * @throws IOException if an I/O error is thrown while parsing the FOP conf + */ + public FopConfParser(File fopConfFile, ResourceResolver resolver) + throws SAXException, IOException { + this(new FileInputStream(fopConfFile), + fopConfFile.getAbsoluteFile().getParentFile().toURI(), resolver); + } + + private void configure(final URI defaultBaseURI, final ResourceResolver resolver, + Configuration cfg) throws FOPException { + if (log.isDebugEnabled()) { + log.debug("Initializing FopFactory Configuration"); + } + + // TODO: This makes this variable both strict FO and user-config validation, is that right? + boolean strict = false; + // strict fo validation + if (cfg.getChild("strict-validation", false) != null) { + try { + strict = cfg.getChild("strict-validation").getValueAsBoolean(); + fopFactoryBuilder.setStrictUserConfigValidation(strict); + } catch (ConfigurationException e) { + LogUtil.handleException(log, e, false); + } + } + + if (cfg.getChild("accessibility", false) != null) { + try { + fopFactoryBuilder.setAccessibility(cfg.getChild("accessibility").getValueAsBoolean()); + } catch (ConfigurationException e) { + LogUtil.handleException(log, e, false); + } + } + + // base definitions for relative path resolution + if (cfg.getChild("base", false) != null) { + try { + URI confUri = URIResolverWrapper.getBaseURI(cfg.getChild("base").getValue(null)); + fopFactoryBuilder.setBaseURI(defaultBaseURI.resolve(confUri)); + } catch (URISyntaxException use) { + LogUtil.handleException(log, use, strict); + } + } + + if (cfg.getChild("hyphenation-base", false) != null) { + String path = cfg.getChild("hyphenation-base").getValue(null); + if (defaultBaseURI != null) { + try { + URI hyphBaseUri = URIResolverWrapper.getBaseURI(path); + fopFactoryBuilder.setHyphenationBaseURI(defaultBaseURI.resolve(hyphBaseUri)); + } catch (URISyntaxException use) { + LogUtil.handleException(log, use, strict); + } + } + } + + // renderer options + if (cfg.getChild("source-resolution", false) != null) { + float srcRes = cfg.getChild("source-resolution").getValueAsFloat( + FopFactoryConfig.DEFAULT_SOURCE_RESOLUTION); + fopFactoryBuilder.setSourceResolution(srcRes); + if (log.isDebugEnabled()) { + log.debug("source-resolution set to: " + srcRes + "dpi"); + } + } + if (cfg.getChild("target-resolution", false) != null) { + float targetRes = cfg.getChild("target-resolution").getValueAsFloat( + FopFactoryConfig.DEFAULT_TARGET_RESOLUTION); + fopFactoryBuilder.setTargetResolution(targetRes); + if (log.isDebugEnabled()) { + log.debug("target-resolution set to: " + targetRes + "dpi"); + } + } + if (cfg.getChild("break-indent-inheritance", false) != null) { + try { + fopFactoryBuilder.setBreakIndentInheritanceOnReferenceAreaBoundary( + cfg.getChild("break-indent-inheritance").getValueAsBoolean()); + } catch (ConfigurationException e) { + LogUtil.handleException(log, e, strict); + } + } + Configuration pageConfig = cfg.getChild("default-page-settings"); + if (pageConfig.getAttribute("height", null) != null) { + String pageHeight = pageConfig.getAttribute("height", + FopFactoryConfig.DEFAULT_PAGE_HEIGHT); + fopFactoryBuilder.setPageHeight(pageHeight); + if (log.isInfoEnabled()) { + log.info("Default page-height set to: " + pageHeight); + } + } + if (pageConfig.getAttribute("width", null) != null) { + String pageWidth = pageConfig.getAttribute("width", + FopFactoryConfig.DEFAULT_PAGE_WIDTH); + fopFactoryBuilder.setPageWidth(pageWidth); + if (log.isInfoEnabled()) { + log.info("Default page-width set to: " + pageWidth); + } + } + + if (cfg.getChild("complex-scripts") != null) { + Configuration csConfig = cfg.getChild("complex-scripts"); + fopFactoryBuilder.setComplexScriptFeatures(!csConfig.getAttributeAsBoolean("disabled", + false)); + } + + setHyphPatNames(cfg, fopFactoryBuilder, strict); + + // prefer Renderer over IFDocumentHandler + if (cfg.getChild(PREFER_RENDERER, false) != null) { + try { + fopFactoryBuilder.setPreferRenderer( + cfg.getChild(PREFER_RENDERER).getValueAsBoolean()); + } catch (ConfigurationException e) { + LogUtil.handleException(log, e, strict); + } + } + + // configure font manager + new FontManagerConfigurator(cfg, fopFactoryBuilder.getBaseUri(), resolver).configure( + fopFactoryBuilder.getFontManager(), strict); + + // configure image loader framework + configureImageLoading(cfg.getChild("image-loading", false), strict); + } + + private void setHyphPatNames(Configuration cfg, FopFactoryBuilder builder, boolean strict) + throws FOPException { + Configuration[] hyphPatConfig = cfg.getChildren("hyphenation-pattern"); + if (hyphPatConfig.length != 0) { + Map<String, String> hyphPatNames = new HashMap<String, String>(); + for (int i = 0; i < hyphPatConfig.length; ++i) { + String lang; + String country; + String filename; + StringBuffer error = new StringBuffer(); + String location = hyphPatConfig[i].getLocation(); + + lang = hyphPatConfig[i].getAttribute("lang", null); + if (lang == null) { + addError("The lang attribute of a hyphenation-pattern configuration" + + " element must exist (" + location + ")", error); + } else if (!lang.matches("[a-zA-Z]{2}")) { + addError("The lang attribute of a hyphenation-pattern configuration" + + " element must consist of exactly two letters (" + + location + ")", error); + } + lang = lang.toLowerCase(); + + country = hyphPatConfig[i].getAttribute("country", null); + if ("".equals(country)) { + country = null; + } + if (country != null) { + if (!country.matches("[a-zA-Z]{2}")) { + addError("The country attribute of a hyphenation-pattern configuration" + + " element must consist of exactly two letters (" + + location + ")", error); + } + country = country.toUpperCase(); + } + + filename = hyphPatConfig[i].getValue(null); + if (filename == null) { + addError("The value of a hyphenation-pattern configuration" + + " element may not be empty (" + location + ")", error); + } + + if (error.length() != 0) { + LogUtil.handleError(log, error.toString(), strict); + continue; + } + + String llccKey = HyphenationTreeCache.constructLlccKey(lang, country); + hyphPatNames.put(llccKey, filename); + if (log.isDebugEnabled()) { + log.debug("Using hyphenation pattern filename " + filename + + " for lang=\"" + lang + "\"" + + (country != null ? ", country=\"" + country + "\"" : "")); + } + } + builder.setHyphPatNames(hyphPatNames); + } + } + + private static void addError(String message, StringBuffer error) { + if (error.length() != 0) { + error.append(". "); + } + error.append(message); + } + + private void configureImageLoading(Configuration parent, boolean strict) throws FOPException { + if (parent == null) { + return; + } + ImageImplRegistry registry = fopFactoryBuilder.getImageManager().getRegistry(); + Configuration[] penalties = parent.getChildren("penalty"); + try { + for (int i = 0, c = penalties.length; i < c; i++) { + Configuration penaltyCfg = penalties[i]; + String className = penaltyCfg.getAttribute("class"); + String value = penaltyCfg.getAttribute("value"); + Penalty p = null; + if (value.toUpperCase().startsWith("INF")) { + p = Penalty.INFINITE_PENALTY; + } else { + try { + p = Penalty.toPenalty(Integer.parseInt(value)); + } catch (NumberFormatException nfe) { + LogUtil.handleException(log, nfe, strict); + } + } + if (p != null) { + registry.setAdditionalPenalty(className, p); + } + } + } catch (ConfigurationException e) { + LogUtil.handleException(log, e, strict); + } + } + + /** + * Returns the {@link FopFactoryBuilder}. + * + * @return the object for configuring the {@link FopFactory} + */ + public FopFactoryBuilder getFopFactoryBuilder() { + return fopFactoryBuilder; + } +} |