1 files changed, 74 insertions, 0 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java
new file mode 100644
index 000000000..2cd1370c1
--- /dev/null
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java
@@ -0,0 +1,74 @@
+/*
+* Copyright 2003 Federal Chancellery Austria
+*
+* 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 at.gv.egovernment.moa.id.auth.builder;
+
+import at.gv.egovernment.moa.id.BuildException;
+import at.gv.egovernment.moa.util.StringUtils;
+
+/**
+ * Base class for HTML/XML builders providing commonly useful functions.
+ * 
+ * @author Paul Ivancsics
+ * @version $Id$
+ */
+public class Builder {
+  
+  /**
+   * Replaces a given number of occurences of a special tag in an XML or HTML template by a value.
+   * @param template html template
+   * @param tag special tag
+   * @param value value replacing the tag
+   * @param expected specifies if the tag is expected to present; if <code>true</code> and the tag
+   *                 is not present, an exception is thrown; if <code>false</code> and the tag is
+   *                 not present, the original string is returned
+   * @param maxreplacements Set -1 to replace each occurence of tag, or limit replacements by a given positive number  
+   * @return XML or HTML code, the tag replaced
+   * @throws BuildException when template does not contain the tag
+   */
+  protected String replaceTag(
+    String template, 
+    String tag, 
+    String value, 
+    boolean expected, 
+    int maxreplacements) 
+  throws BuildException 
+  {
+    String result = template;
+    int index = result.indexOf(tag);
+    if (index < 0) {
+      if (expected) {
+    	// Substring not found but should
+        throw new BuildException(
+                "builder.01", 
+                new Object[] {"&lt;" + tag.substring(1, tag.length() - 1) + "&gt;"});
+      }
+    } else {
+       // replace each occurence
+       if (maxreplacements == -1) {
+         return StringUtils.replaceAll(template, tag, value);       
+       } else {
+         int found = 1;
+         while (index > -1 && (found <= maxreplacements)) {
+           result = result.substring(0, index) + value + result.substring(index + tag.length());
+           index = result.indexOf(tag);
+           if (index > -1) found += 1;
+         }
+       }
+    }
+    return result;
+  }
+
+}