breaking out general purpose validation stuff

formerly in mircoders.localizer.basic.MirBasicPostingSessionHandler

diff --git a/source/mir/session/ValidationError.java b/source/mir/session/ValidationError.java
new file mode 100755 (executable)
index 0000000..5768240
--- /dev/null
+++ b/source/mir/session/ValidationError.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2001, 2002 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with  any library licensed under the Apache Software License,
+ * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
+ * (or with modified versions of the above that use the same license as the above),
+ * and distribute linked combinations including the two.  You must obey the
+ * GNU General Public License in all respects for all of the code used other than
+ * the above mentioned libraries.  If you modify this file, you may extend this
+ * exception to your version of the file, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your version.
+ */
+
+package mir.session;
+
+import java.util.Arrays;
+import java.util.List;
+
+  /**
+   * Class that represents a validation error
+   *
+   * <p>Title: </p>
+   * <p>Description: </p>
+   * <p>Copyright: Copyright (c) 2003</p>
+   * <p>Company: </p>
+   * @author not attributable
+   * @version 1.0
+   */
+
+public class ValidationError {
+  private String field;
+  private String message;
+  private List parameters;
+  
+  public ValidationError(String aField, String aMessage) {
+    this (aField, aMessage, new String[] {});
+  }
+  
+  public ValidationError(String aField, String aMessage, Object aParameter) {
+    this (aField, aMessage, new Object[] {aParameter});
+  }
+  
+  public ValidationError(String aField, String aMessage, Object[] aParameters) {
+    field = aField;
+    message = aMessage;
+    parameters = Arrays.asList(aParameters);
+  }
+
+  public String getMessage() {
+    return message;
+  }
+  
+  public String getField() {
+    return field;
+  }
+  
+  public List getParameters() {
+    return parameters;
+    }
+}
+
+

diff --git a/source/mir/session/ValidationHelper.java b/source/mir/session/ValidationHelper.java
new file mode 100755 (executable)
index 0000000..015b9ab
--- /dev/null
+++ b/source/mir/session/ValidationHelper.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2001, 2002 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with  any library licensed under the Apache Software License,
+ * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
+ * (or with modified versions of the above that use the same license as the above),
+ * and distribute linked combinations including the two.  You must obey the
+ * GNU General Public License in all respects for all of the code used other than
+ * the above mentioned libraries.  If you modify this file, you may extend this
+ * exception to your version of the file, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your version.
+ */
+
+package mir.session;
+
+import java.util.List;
+
+import mir.session.Request;
+import mir.session.ValidationError;
+
+
+public class ValidationHelper {
+  /**
+   * Convenience validation method to test whether a field has been filled in
+   *
+   * @param aRequest
+   * @param aFieldName
+   * @param anErrorMessageResource
+   * @param aValidationResults
+   * @return
+   */
+
+  public static boolean testFieldEntered(Request aRequest, String aFieldName, String anErrorMessageResource, List aValidationResults) {
+    Object value = aRequest.getParameter(aFieldName);
+    if (value==null || !(value instanceof String) || ((String) value).trim().length()==0) {
+      aValidationResults.add(new ValidationError(aFieldName, anErrorMessageResource));
+      return false;
+    }
+    else
+      return true;
+  }
+
+  /**
+   * Convenience validation method to test wether a field is numeric
+
+   * @param aRequest
+   * @param aFieldName
+   * @param anErrorMessageResource
+   * @param aValidationResults
+   * @return
+   */
+
+  public static boolean testFieldIsNumeric(Request aRequest, String aFieldName, String anErrorMessageResource, List aValidationResults) {
+    Object value = aRequest.getParameter(aFieldName);
+    if (value!=null) {
+      try {
+        Integer.parseInt((String) value);
+        return true;
+      }
+      catch (Throwable t) {
+        aValidationResults.add(new ValidationError(aFieldName, anErrorMessageResource));
+        return false;
+      }
+    }
+    return true;
+  }
+
+  /**
+   * Convenience validation method to test whether a field exceeds a given length
+
+   * @param aRequest
+   * @param aFieldName
+   * @param aMaxLength
+   * @param anErrorMessageResource
+   * @param aValidationResults
+   * @return
+   */
+
+  public static boolean testFieldLength(Request aRequest, String aFieldName, int aMaxLength, String anErrorMessageResource, List aValidationResults) {
+    String value = aRequest.getParameter(aFieldName);
+
+    if (value!=null) {
+      if (value.length()>aMaxLength) {
+        aValidationResults.add(new ValidationError(aFieldName, anErrorMessageResource));
+        return false;
+      }
+      else return true;
+    }
+    return true;
+  }
+}