/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.elasticsearch.common.lucene.search;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.OpenBitSet;

import java.io.IOException;

/**
 * A simple filter for a specific term.
 *
 * @author kimchy (shay.banon)
 */
public class TermFilter extends Filter {

    private final Term term;

    public TermFilter(Term term) {
        this.term = term;
    }

    public Term getTerm() {
        return term;
    }

    @Override public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
        OpenBitSet result = new OpenBitSet(reader.maxDoc());
        TermDocs td = reader.termDocs();
        try {
            td.seek(term);
            while (td.next()) {
                result.fastSet(td.doc());
            }
        }
        finally {
            td.close();
        }
        return result;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        TermFilter that = (TermFilter) o;

        if (term != null ? !term.equals(that.term) : that.term != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        return term != null ? term.hashCode() : 0;
    }
}

/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.elasticsearch.common.lucene.search;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.OpenBitSet;

import java.io.IOException;

/**
 * A simple filter for a specific term.
 *
 * @author kimchy (shay.banon)
 */
public class TermFilter extends Filter {

    private final Term term;

    public TermFilter(Term term) {
        this.term = term;
    }

    public Term getTerm() {
        return term;
    }

    @Override public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
        OpenBitSet result = new OpenBitSet(reader.maxDoc());
        TermDocs td = reader.termDocs();
        try {
            td.seek(term);
            while (td.next()) {
                result.fastSet(td.doc());
            }
        }
        finally {
            td.close();
        }
        return result;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        TermFilter that = (TermFilter) o;

        if (term != null ? !term.equals(that.term) : that.term != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        return term != null ? term.hashCode() : 0;
    }

    @Override public String toString() {
        return term.field() + ":" + term.text();
    }
}

add term filter toString