gaffer.predicate.summarytype.impl.SummaryTypeInSetPredicate.java Source code

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Here is the source code for gaffer.predicate.summarytype.impl.SummaryTypeInSetPredicate.java

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/**
 * Copyright 2015 Crown Copyright
 *
 * Licensed 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 gaffer.predicate.summarytype.impl;

import gaffer.predicate.summarytype.SummaryTypePredicate;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.apache.hadoop.io.Text;

/**
 * A predicate that returns true if the given summary type is in the
 * provided set of {@link String}s.
 */
public class SummaryTypeInSetPredicate extends SummaryTypePredicate {

    private static final long serialVersionUID = 2445811708688453414L;
    private Set<String> allowedSummaryTypes;

    public SummaryTypeInSetPredicate() {
        this.allowedSummaryTypes = new HashSet<String>();
    }

    public SummaryTypeInSetPredicate(Set<String> allowedSummaryTypes) {
        this.allowedSummaryTypes = allowedSummaryTypes;
    }

    public SummaryTypeInSetPredicate(String... allowedSummaryTypes) {
        this();
        Collections.addAll(this.allowedSummaryTypes, allowedSummaryTypes);
    }

    public void addAllowedSummaryTypes(Set<String> allowedSummaryTypes) {
        this.allowedSummaryTypes.addAll(allowedSummaryTypes);
    }

    public void addAllowedSummaryTypes(String... allowedSummaryTypes) {
        Collections.addAll(this.allowedSummaryTypes, allowedSummaryTypes);
    }

    public boolean accept(String summaryType, String summarySubType) {
        return allowedSummaryTypes.contains(summaryType);
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        int size = in.readInt();
        allowedSummaryTypes = new HashSet<String>(size);
        for (int i = 0; i < size; i++) {
            allowedSummaryTypes.add(Text.readString(in));
        }
    }

    @Override
    public void write(DataOutput out) throws IOException {
        out.writeInt(allowedSummaryTypes.size());
        for (String s : allowedSummaryTypes) {
            Text.writeString(out, s);
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((allowedSummaryTypes == null) ? 0 : allowedSummaryTypes.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        SummaryTypeInSetPredicate other = (SummaryTypeInSetPredicate) obj;
        if (allowedSummaryTypes == null) {
            if (other.allowedSummaryTypes != null)
                return false;
        } else if (!allowedSummaryTypes.equals(other.allowedSummaryTypes))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "SummaryTypeInSetPredicate [allowedSummaryTypes=" + allowedSummaryTypes + "]";
    }

}