From 4180be8908fa4f520599e6d416b403008e384310 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 21 Jun 2018 15:22:50 +0200
Subject: [client] Refactor change monitor classes, better error message
 handling

---
 .../gui/changemonitor/AbstractControlWrapper.java  | 48 ++++++++++++++++------
 1 file changed, 36 insertions(+), 12 deletions(-)

(limited to 'dozentenmodul/src/main/java/org/openslx/dozmod/gui/changemonitor/AbstractControlWrapper.java')

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/changemonitor/AbstractControlWrapper.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/changemonitor/AbstractControlWrapper.java
index 4f7f2145..e43b5393 100644
--- a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/changemonitor/AbstractControlWrapper.java
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/changemonitor/AbstractControlWrapper.java
@@ -1,6 +1,10 @@
 package org.openslx.dozmod.gui.changemonitor;
 
+import java.util.ArrayList;
 import java.util.Comparator;
+import java.util.List;
+
+import org.openslx.dozmod.gui.changemonitor.DialogChangeMonitor.ValidationConstraint;
 
 /**
  * Control/element wrapper
@@ -9,23 +13,19 @@ public abstract class AbstractControlWrapper<T> {
 	private final DialogChangeMonitor dcm;
 	protected boolean wasEverChanged;
 	protected boolean isCurrentlyChanged;
-	protected boolean isValid = true;
 	private T originalContent;
-	private final DialogChangeMonitor.ValidationConstraint<T> constraint;
+	private List<ValidationConstraint<T>> constraints;
 	private final Comparator<T> cmp;
-	protected final String constraintErrorMessage;
+	protected String currentError = null;
 	/**
 	 * If muted, this wrapper will not react to changes of the underlying
 	 * control.
 	 */
 	private boolean muted = false;
 
-	protected AbstractControlWrapper(DialogChangeMonitor dcm, String errorMessage, Comparator<T> comp,
-			DialogChangeMonitor.ValidationConstraint<T> cons) {
+	protected AbstractControlWrapper(DialogChangeMonitor dcm, Comparator<T> comp) {
 		this.dcm = dcm;
-		this.constraintErrorMessage = errorMessage;
 		this.cmp = comp;
-		this.constraint = cons;
 	}
 
 	public boolean hasChangedSinceInit() {
@@ -36,6 +36,24 @@ public abstract class AbstractControlWrapper<T> {
 		return isCurrentlyChanged;
 	}
 
+	/**
+	 * Returns the current error message for the first failed constraint. If no
+	 * constraint currently yields invalid, null is returned.
+	 * 
+	 * @return
+	 */
+	public String currentConstraintError() {
+		return currentError;
+	}
+	
+	public AbstractControlWrapper<T> addConstraint(ValidationConstraint<T> constraint) {
+		if (constraints == null) {
+			constraints = new ArrayList<>();
+		}
+		constraints.add(constraint);
+		return this;
+	}
+
 	/**
 	 * Resets the change state of this control
 	 * and removes the "muted" flag, if set.
@@ -48,7 +66,7 @@ public abstract class AbstractControlWrapper<T> {
 			dcm.contentChanged(this);
 		}
 	}
-
+	
 	protected final void resetChangeState() {
 		muted = false;
 		isCurrentlyChanged = wasEverChanged = false;
@@ -107,12 +125,18 @@ public abstract class AbstractControlWrapper<T> {
 	}
 
 	protected void checkValid(T text) {
-		if (muted)
+		if (muted || constraints == null || constraints.isEmpty())
 			return;
-		boolean valid = constraint == null || constraint.isValid(text);
-		if (isValid != valid) {
-			isValid = valid;
+		String error = null;
+		for (ValidationConstraint<T> i : constraints) {
+			error = i.checkStateValid(text);
+			if (error != null)
+				break;
+		}
+		if (error != currentError) {
+			currentError = error;
 			dcm.validityChanged(this);
 		}
 	}
+
 }
\ No newline at end of file
-- 
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