diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/CollectionUtils.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/CollectionUtils.java | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/CollectionUtils.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/CollectionUtils.java deleted file mode 100644 index 03c48d93..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/CollectionUtils.java +++ /dev/null @@ -1,278 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You 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.apache.tools.ant.util; - -import java.util.ArrayList; -import java.util.Collection; -import java.util.Collections; -import java.util.Dictionary; -import java.util.Enumeration; -import java.util.Iterator; -import java.util.List; -import java.util.NoSuchElementException; -import java.util.Vector; - -// CheckStyle:HideUtilityClassConstructorCheck OFF - bc - -/** - * A set of helper methods related to collection manipulation. - * - * @since Ant 1.5 - */ -public class CollectionUtils { - - /** - * Collections.emptyList() is Java5+. - */ - @SuppressWarnings("rawtypes") - @Deprecated - public static final List EMPTY_LIST = Collections.EMPTY_LIST; - - /** - * Please use Vector.equals() or List.equals(). - * @param v1 the first vector. - * @param v2 the second vector. - * @return true if the vectors are equal. - * @since Ant 1.5 - * @deprecated since 1.6.x. - */ - public static boolean equals(Vector<?> v1, Vector<?> v2) { - if (v1 == v2) { - return true; - } - - if (v1 == null || v2 == null) { - return false; - } - - return v1.equals(v2); - } - - /** - * Dictionary does not have an equals. - * Please use Map.equals(). - * - * <p>Follows the equals contract of Java 2's Map.</p> - * @param d1 the first directory. - * @param d2 the second directory. - * @return true if the directories are equal. - * @since Ant 1.5 - * @deprecated since 1.6.x. - */ - public static boolean equals(Dictionary<?, ?> d1, Dictionary<?, ?> d2) { - if (d1 == d2) { - return true; - } - - if (d1 == null || d2 == null) { - return false; - } - - if (d1.size() != d2.size()) { - return false; - } - - Enumeration<?> e1 = d1.keys(); - while (e1.hasMoreElements()) { - Object key = e1.nextElement(); - Object value1 = d1.get(key); - Object value2 = d2.get(key); - if (value2 == null || !value1.equals(value2)) { - return false; - } - } - - // don't need the opposite check as the Dictionaries have the - // same size, so we've also covered all keys of d2 already. - - return true; - } - - /** - * Creates a comma separated list of all values held in the given - * collection. - * - * @param c collection to transform - * @return string representation of the collection - * @since Ant 1.8.0 - */ - public static String flattenToString(Collection<?> c) { - final StringBuilder sb = new StringBuilder(); - for (Object o : c) { - if (sb.length() != 0) { - sb.append(","); - } - sb.append(o); - } - return sb.toString(); - } - - /** - * Dictionary does not know the putAll method. Please use Map.putAll(). - * @param m1 the to directory. - * @param m2 the from directory. - * @param <K> type of the key - * @param <V> type of the value - * @since Ant 1.6 - * @deprecated since 1.6.x. - */ - public static <K, V> void putAll(Dictionary<? super K, ? super V> m1, Dictionary<? extends K, ? extends V> m2) { - for (Enumeration<? extends K> it = m2.keys(); it.hasMoreElements();) { - K key = it.nextElement(); - m1.put(key, m2.get(key)); - } - } - - /** - * An empty enumeration. - * @since Ant 1.6 - */ - public static final class EmptyEnumeration<E> implements Enumeration<E> { - /** Constructor for the EmptyEnumeration */ - public EmptyEnumeration() { - } - - /** - * @return false always. - */ - public boolean hasMoreElements() { - return false; - } - - /** - * @return nothing. - * @throws NoSuchElementException always. - */ - public E nextElement() throws NoSuchElementException { - throw new NoSuchElementException(); - } - } - - /** - * Append one enumeration to another. - * Elements are evaluated lazily. - * @param e1 the first enumeration. - * @param e2 the subsequent enumeration. - * @param <E> element type - * @return an enumeration representing e1 followed by e2. - * @since Ant 1.6.3 - */ - public static <E> Enumeration<E> append(Enumeration<E> e1, Enumeration<E> e2) { - return new CompoundEnumeration<E>(e1, e2); - } - - /** - * Adapt the specified Iterator to the Enumeration interface. - * @param iter the Iterator to adapt. - * @param <E> element type - * @return an Enumeration. - */ - public static <E> Enumeration<E> asEnumeration(final Iterator<E> iter) { - return new Enumeration<E>() { - public boolean hasMoreElements() { - return iter.hasNext(); - } - public E nextElement() { - return iter.next(); - } - }; - } - - /** - * Adapt the specified Enumeration to the Iterator interface. - * @param e the Enumeration to adapt. - * @param <E> element type - * @return an Iterator. - */ - public static <E> Iterator<E> asIterator(final Enumeration<E> e) { - return new Iterator<E>() { - public boolean hasNext() { - return e.hasMoreElements(); - } - public E next() { - return e.nextElement(); - } - public void remove() { - throw new UnsupportedOperationException(); - } - }; - } - - /** - * Returns a collection containing all elements of the iterator. - * - * @param iter the Iterator to convert - * @param <T> element type - * @return the collection - * @since Ant 1.8.0 - */ - public static <T> Collection<T> asCollection(final Iterator<? extends T> iter) { - List<T> l = new ArrayList<T>(); - while (iter.hasNext()) { - l.add(iter.next()); - } - return l; - } - - private static final class CompoundEnumeration<E> implements Enumeration<E> { - - private final Enumeration<E> e1, e2; - - public CompoundEnumeration(Enumeration<E> e1, Enumeration<E> e2) { - this.e1 = e1; - this.e2 = e2; - } - - public boolean hasMoreElements() { - return e1.hasMoreElements() || e2.hasMoreElements(); - } - - public E nextElement() throws NoSuchElementException { - if (e1.hasMoreElements()) { - return e1.nextElement(); - } else { - return e2.nextElement(); - } - } - - } - - /** - * Counts how often the given Object occurs in the given - * collection using equals() for comparison. - * - * @param c collection in which to search - * @param o object to search - * @return frequency - * @since Ant 1.8.0 - */ - public static int frequency(Collection<?> c, Object o) { - // same as Collections.frequency introduced with JDK 1.5 - int freq = 0; - if (c != null) { - for (Iterator<?> i = c.iterator(); i.hasNext();) { - Object test = i.next(); - if (o == null ? test == null : o.equals(test)) { - freq++; - } - } - } - return freq; - } - -} |