1 files changed, 65 insertions, 0 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/ErrorExtractor.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/ErrorExtractor.java
new file mode 100644
index 00000000..90a4e9e8
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/ErrorExtractor.java
@@ -0,0 +1,65 @@
+package at.gv.egiz.pdfas.lib.impl;
+
+import at.gv.egiz.pdfas.common.exceptions.ErrorConstants;
+import at.gv.egiz.pdfas.common.exceptions.PDFASError;
+import at.gv.egiz.pdfas.common.exceptions.SLPdfAsException;
+
+public class ErrorExtractor implements ErrorConstants {
+
+	private static final int MAX_CAUSE_DEPTH = 30;
+
+	private static PDFASError convertPdfAsError(Throwable e) {
+		if (e instanceof SLPdfAsException) {
+			SLPdfAsException ex = (SLPdfAsException) e;
+			if (ex.getInfo() != null) {
+				return new PDFASError(ex.getCode(), ex.getInfo(), e);
+			} else {
+				return new PDFASError(ex.getCode(), e);
+			}
+		} // TODO: Handle more exceptions
+
+		return null;
+	}
+
+	public static PDFASError searchPdfAsError(Throwable e) {
+		Throwable cur = e;
+		PDFASError err = null;
+
+		// Search PDFASError
+		for (int i = 0; i < MAX_CAUSE_DEPTH; i++) {
+			if (cur instanceof PDFASError) {
+				err = (PDFASError) cur;
+			}
+			if (err != null) {
+				break;
+			}
+
+			cur = cur.getCause();
+			if (cur == null) {
+				break;
+			}
+		}
+		cur = e;
+		// Search other reasons
+		for (int i = 0; i < MAX_CAUSE_DEPTH; i++) {
+
+			if (cur == null) {
+				break;
+			}
+
+			err = convertPdfAsError(cur);
+
+			if (err != null) {
+				break;
+			}
+
+			cur = cur.getCause();
+		}
+
+		if (err != null) {
+			return err;
+		}
+
+		return new PDFASError(ERROR_GENERIC, e);
+	}
+}