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package org.apache.lucene.index;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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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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import java.io.IOException;
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import java.io.Closeable;
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/** Abstract class for enumerating terms.
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<p>Term enumerations are always ordered by Term.compareTo(). Each term in
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the enumeration is greater than all that precede it. */
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public abstract class TermEnum implements Closeable {
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/** Increments the enumeration to the next element. True if one exists.*/
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public abstract boolean next() throws IOException;
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/** Returns the current Term in the enumeration.*/
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public abstract Term term();
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/** Returns the docFreq of the current Term in the enumeration.*/
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public abstract int docFreq();
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/** Closes the enumeration to further activity, freeing resources. */
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public abstract void close() throws IOException;