added basic Preprocessor infrastructure, moved logging to logback

3 files changed, 138 insertions, 0 deletions

diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/DebugPreProcessor.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/DebugPreProcessor.java
new file mode 100644
index 00000000..1a262aca
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/DebugPreProcessor.java
@@ -0,0 +1,69 @@
+package at.gv.egiz.pdfas.lib.impl.preprocessor;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.common.exceptions.PDFASError;
+import at.gv.egiz.pdfas.lib.api.Configuration;
+import at.gv.egiz.pdfas.lib.api.preprocessor.PreProcessor;
+import at.gv.egiz.pdfas.lib.api.sign.SignParameter;
+import at.gv.egiz.pdfas.lib.api.verify.VerifyParameter;
+
+public class DebugPreProcessor implements PreProcessor {
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(DebugPreProcessor.class);
+	
+	private static final String NAME = "Debug PreProcessor";
+	
+	@Override
+	public void initialize(Configuration configuration) {
+		logger.debug("Initializing {}", getName());
+	}
+
+	private void listPPArguments(Map<String, String> map) {
+		if(map != null) {
+			logger.debug("pre processor arguments:");
+			Iterator<Entry<String, String>> entryIt = map.entrySet().iterator();
+			while(entryIt.hasNext()) {
+				Entry<String, String> entry = entryIt.next();
+				logger.debug("  {} => {}", entry.getKey(), entry.getValue());
+			}
+		} else {
+			logger.debug("No pre processor arguments");
+		}
+	}
+	
+	@Override
+	public void sign(SignParameter parameter) throws PDFASError {
+		logger.debug("preprocessor signing ...");
+		
+		listPPArguments(parameter.getPreprocessorArguments());
+		
+		logger.debug("preprocessor signing done");
+	}
+
+	@Override
+	public void verify(VerifyParameter parameter) throws PDFASError {
+		logger.debug("preprocessor verifing ...");
+		
+		listPPArguments(parameter.getPreprocessorArguments());
+		
+		logger.debug("preprocessor verifing done");
+	}
+
+	@Override
+	public int registrationPosition() {
+		return -1;
+	}
+
+	@Override
+	public String getName() {
+		return NAME;
+	}
+
+}
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorCompare.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorCompare.java
new file mode 100644
index 00000000..ef716403
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorCompare.java
@@ -0,0 +1,25 @@
+package at.gv.egiz.pdfas.lib.impl.preprocessor;
+
+import java.util.Comparator;
+
+import at.gv.egiz.pdfas.lib.api.preprocessor.PreProcessor;
+
+public class PreProcessorCompare implements Comparator<PreProcessor> {
+
+	@Override
+	public int compare(PreProcessor o1, PreProcessor o2) {
+		if(o1.registrationPosition() < 0 && o2.registrationPosition() < 0) {
+			// equal
+			return 0;
+		} else if(o1.registrationPosition() < 0) {
+			// o2 vor o1
+			return 1;
+		} else if(o2.registrationPosition() < 0) {
+			// o1 vor o2
+			return -1;
+		} else {
+			return Integer.compare(o1.registrationPosition(), o2.registrationPosition());
+		}
+	}
+
+}
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorLoader.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorLoader.java
new file mode 100644
index 00000000..91218c82
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorLoader.java
@@ -0,0 +1,44 @@
+package at.gv.egiz.pdfas.lib.impl.preprocessor;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ServiceLoader;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.lib.api.Configuration;
+import at.gv.egiz.pdfas.lib.api.preprocessor.PreProcessor;
+
+public class PreProcessorLoader {
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(PreProcessorLoader.class);
+	
+	private static ServiceLoader<PreProcessor> preProcessorLoader = ServiceLoader.load(PreProcessor.class);
+	
+	public static List<PreProcessor> getPreProcessors(Configuration configuration) {
+		logger.debug("building PreProcessors");
+		
+		List<PreProcessor> processors = new ArrayList<PreProcessor>();
+		Iterator<PreProcessor> processorIterator = preProcessorLoader.iterator();
+		
+		while(processorIterator.hasNext()) {
+			PreProcessor preProcessor = processorIterator.next();
+			logger.debug("Loading " + preProcessor.getName() + " [" + preProcessor.getClass().getName() + "]");
+			preProcessor.initialize(configuration);
+			logger.debug("Initialized " + preProcessor.getName());
+			processors.add(preProcessor);
+			logger.debug("Preprocessor added " + preProcessor.getName());
+		}
+		
+		logger.debug("PreProcessors constructed");
+		
+		Collections.sort(processors, new PreProcessorCompare());
+		
+		logger.debug("PreProcessors sorted");
+		return processors;
+	}
+}