mirror of https://github.com/apache/jclouds.git
added new param parser for comma-separated lists
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/**
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*
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* Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
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*
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* ====================================================================
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ====================================================================
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*/
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package org.jclouds.functions;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.base.Preconditions.checkNotNull;
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import java.lang.reflect.Array;
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import javax.inject.Singleton;
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import com.google.common.base.Function;
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import com.google.common.base.Joiner;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.ImmutableList.Builder;
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/**
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*
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* @author Adrian Cole
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*
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*/
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@Singleton
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public class JoinOnComma implements Function<Object, String> {
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public String apply(Object o) {
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checkNotNull(o, "input cannot be null");
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if (o.getClass().isArray()) {
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Builder<Object> builder = ImmutableList.builder();
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for (int i = 0; i < Array.getLength(o); i++)
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builder.add(Array.get(o, i));
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o = builder.build();
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}
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checkArgument(o instanceof Iterable<?>, "you must pass an iterable or array");
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Iterable<?> toJoin = (Iterable<?>) o;
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checkArgument(Iterables.size(toJoin) > 0, "you must pass an iterable or array with elements");
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return Joiner.on(',').join(toJoin);
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}
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}
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@ -0,0 +1,61 @@
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/**
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*
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* Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
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*
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* ====================================================================
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ====================================================================
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*/
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package org.jclouds.functions;
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import static org.testng.Assert.assertEquals;
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import org.jclouds.functions.JoinOnComma;
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import org.testng.annotations.Test;
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import com.google.common.collect.ImmutableList;
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/**
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*
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* @author Adrian Cole
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*/
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@Test(groups = "unit", sequential = true)
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public class JoinOnCommaTest {
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@Test
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public void testIterableLong() {
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String list = new JoinOnComma().apply(ImmutableList.of(1l, 2l));
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assertEquals(list, "1,2");
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}
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@Test
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public void testLongArray() {
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String list = new JoinOnComma().apply(new long[] { 1l, 2l });
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assertEquals(list, "1,2");
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}
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testEmptyArrayIllegalArgumentException() {
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new JoinOnComma().apply(new long[] {});
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}
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testEmptyIterableIllegalArgumentException() {
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new JoinOnComma().apply(ImmutableList.of());
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}
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@Test(expectedExceptions = NullPointerException.class)
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public void testNullPointer() {
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new JoinOnComma().apply(null);
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}
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}
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