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Diffstat (limited to 'common/src/at/gv/egovernment/moa/util/StreamEntityResolver.java')
-rw-r--r--common/src/at/gv/egovernment/moa/util/StreamEntityResolver.java64
1 files changed, 64 insertions, 0 deletions
diff --git a/common/src/at/gv/egovernment/moa/util/StreamEntityResolver.java b/common/src/at/gv/egovernment/moa/util/StreamEntityResolver.java
new file mode 100644
index 000000000..38c4e863c
--- /dev/null
+++ b/common/src/at/gv/egovernment/moa/util/StreamEntityResolver.java
@@ -0,0 +1,64 @@
+package at.gv.egovernment.moa.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Map;
+
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * An <code>EntityResolver</code> that maps system IDs to
+ * <code>InputStream</code>s.
+ *
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class StreamEntityResolver implements EntityResolver {
+
+ /** A mapping from Public ID or System ID to an <code>InputStream</code>
+ * containing the entity. */
+ private Map mappedEntities;
+
+ /**
+ * Create a <code>StreamEntityResolver</code>.
+ *
+ * @param mappedEntities A mapping from public or system IDs
+ * (<code>String</code> objects) to <code>InputStream</code>s.
+ */
+ public StreamEntityResolver(Map mappedEntities) {
+ this.mappedEntities = mappedEntities;
+ }
+
+ /**
+ * Resolve an entity by looking it up in the mapped entities.
+ *
+ * First, the public ID is looked up in the mapping, then the system ID.
+ *
+ * @param publicId The public ID of the entity.
+ * @param systemId The system ID of the entity.
+ * @return An <code>InputStream</code> containing the entity or
+ * <code>null</code> if no entity could be found.
+ * @throws SAXException Signalling a parsing exception.
+ * @throws IOException Error reading the entity.
+ */
+ public InputSource resolveEntity(String publicId, String systemId)
+ throws SAXException, IOException {
+
+ InputSource src = null;
+
+ if (publicId != null && mappedEntities.get(publicId) != null) {
+ src = new InputSource((InputStream) mappedEntities.get(publicId));
+ } else if (systemId != null && mappedEntities.get(systemId) != null) {
+ src = new InputSource((InputStream) mappedEntities.get(systemId));
+ }
+
+ if (src != null) {
+ src.setPublicId(publicId);
+ src.setSystemId(systemId);
+ }
+
+ return src;
+ }
+}