refactoring of the config interface towards more reuse in the implementation and...

[xmlrouter] / impl / src / main / java / org / wamblee / xmlrouter / impl / RobustDocumentType.java

diff --git a/impl/src/main/java/org/wamblee/xmlrouter/impl/RobustDocumentType.java b/impl/src/main/java/org/wamblee/xmlrouter/impl/RobustDocumentType.java
new file mode 100644 (file)
index 0000000..34664e8
--- /dev/null
+++ b/impl/src/main/java/org/wamblee/xmlrouter/impl/RobustDocumentType.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2005-2011 the original author or authors.
+ * 
+ * Licensed 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.
+ */
+package org.wamblee.xmlrouter.impl;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.xml.transform.dom.DOMSource;
+
+import org.wamblee.xmlrouter.common.Id;
+import org.wamblee.xmlrouter.config.DocumentType;
+
+/**
+ * Robust document type provides robustness towards externally provided document
+ * types.
+ * 
+ * @author Erik Brakkee
+ * 
+ */
+public class RobustDocumentType implements DocumentType {
+
+    private static final Logger LOGGER = Logger
+        .getLogger(RobustDocumentType.class.getName());
+
+    private Id<DocumentType> id;
+    private DocumentType type;
+
+    /**
+     * Constructs the wrapper.
+     * 
+     * @param aId
+     *            Id.
+     * @param aType
+     *            Document type to wrap.
+     */
+    public RobustDocumentType(Id<DocumentType> aId, DocumentType aType) {
+        id = aId;
+        type = aType;
+    }
+
+    @Override
+    public String getName() {
+        try {
+            String name = type.getName();
+            if (name == null) {
+                LOGGER.log(Level.WARNING, "Document type " + id +
+                    " returned null for name");
+                return Constants.UNKNOWN_DOCUMENT_TYPE.toString();
+            }
+            return name;
+        } catch (Exception e) {
+            LOGGER.log(Level.WARNING, "Document type " + id +
+                " threw exception", e);
+            return Constants.UNKNOWN_DOCUMENT_TYPE.toString();
+        }
+    }
+
+    @Override
+    public boolean isInstance(DOMSource aSource) {
+        try {
+            return type.isInstance(aSource);
+        } catch (Exception e) {
+            LOGGER.log(Level.WARNING, "Document type " + id +
+                " threw exception", e);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean validate(DOMSource aSource) {
+        try {
+            return type.validate(aSource);
+        } catch (Exception e) {
+            LOGGER.log(Level.WARNING, "Document type " + id +
+                " threw exception", e);
+            return false;
+        }
+    }
+}