Moving files around

2026-05-22 00:00:03 -04:00 · 2009-11-06 21:26:32 +01:00
parent ba5f0a2f5f
commit 9b615de8ed
86 changed files with 0 additions and 0 deletions
@@ -0,0 +1,124 @@
+package com.twelvemonkeys.lang;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Map;
+
+/**
+ * Kind of like {@code org.apache.commons.lang.Validate}. Just smarter. ;-)
+ * <p/>
+ * Uses type parameterized return values, thus making it possible to check
+ * constructor arguments before
+ * they are passed on to {@code super} or {@code this} type constructors. 
+ *
+ * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
+ * @author last modified by $Author: haku $
+ * @version $Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/lang/Validate.java#1 $
+ */
+public final class Validate {
+    private static final String UNSPECIFIED_PARAM_NAME = "method parameter";
+
+    private Validate() {}
+
+    // Not null...
+
+    public static <T> T notNull(final T pParameter) {
+        return notNull(pParameter, null);
+    }
+
+    public static <T> T notNull(final T pParameter, final String pParamName) {
+        if (pParameter == null) {
+            throw new IllegalArgumentException(String.format("%s may not be null", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+        }
+        return pParameter;
+    }
+
+    // Not empty...
+
+    public static <T extends CharSequence> T notEmpty(final T pParameter) {
+        return notEmpty(pParameter, null);
+    }
+
+    public static <T extends CharSequence> T notEmpty(final T pParameter, final String pParamName) {
+        if (pParameter == null || pParameter.length() == 0) {
+            throw new IllegalArgumentException(String.format("%s may not be empty", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+        }
+
+        return pParameter;
+    }
+
+    public static <T> T[] notEmpty(final T[] pParameter) {
+        return notEmpty(pParameter, null);
+    }
+
+    public static <T> T[] notEmpty(final T[] pParameter, final String pParamName) {
+        if (pParameter == null || pParameter.length == 0) {
+            throw new IllegalArgumentException(String.format("%s may not be empty", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+        }
+
+        return pParameter;
+    }
+
+    public static <T> Collection<T> notEmpty(final Collection<T> pParameter) {
+        return notEmpty(pParameter, null);
+    }
+
+    public static <T> Collection<T> notEmpty(final Collection<T> pParameter, final String pParamName) {
+        if (pParameter == null || pParameter.isEmpty()) {
+            throw new IllegalArgumentException(String.format("%s may not be empty", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+        }
+
+        return pParameter;
+    }
+
+    public static <K, V> Map<K, V> notEmpty(final Map<K, V> pParameter) {
+        return notEmpty(pParameter, null);
+    }
+
+    public static <K, V> Map<K, V> notEmpty(final Map<K, V> pParameter, final String pParamName) {
+        if (pParameter == null || pParameter.isEmpty()) {
+            throw new IllegalArgumentException(String.format("%s may not be empty", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+        }
+
+        return pParameter;
+    }
+
+    // No null elements
+
+    public static <T> T[] noNullElements(final T[] pParameter) {
+        return noNullElements(pParameter, null);
+    }
+
+    public static <T> T[] noNullElements(final T[] pParameter, final String pParamName) {
+        noNullElements(Arrays.asList(pParameter), pParamName);
+        return pParameter;
+    }
+
+    public static <T> Collection<T> noNullElements(final Collection<T> pParameter) {
+        return noNullElements(pParameter, null);
+    }
+
+    public static <T> Collection<T> noNullElements(final Collection<T> pParameter, final String pParamName) {
+        for (T element : pParameter) {
+            if (element == null) {
+                throw new IllegalArgumentException(String.format("%s may not contain null elements", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+            }
+        }
+
+        return pParameter;
+    }
+
+    public static <K, V> Map<K, V>  noNullElements(final Map<K, V>  pParameter) {
+        return noNullElements(pParameter, null);
+    }
+
+    public static <K, V> Map<K, V>  noNullElements(final Map<K, V>  pParameter, final String pParamName) {
+        for (V element : pParameter.values()) {
+            if (element == null) {
+                throw new IllegalArgumentException(String.format("%s may not contain null elements", pParamName == null ? UNSPECIFIED_PARAM_NAME : pParamName));
+            }
+        }
+
+        return pParameter;
+    }
+}