de.metanome.algorithm_integration.ColumnConditionAnd.java Source code

Introduction

Here is the source code for de.metanome.algorithm_integration.ColumnConditionAnd.java

Source

/*
 * Copyright 2014 by the Metanome project
 *
 * 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 de.metanome.algorithm_integration;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonTypeName;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;

/**
 * Logical "and" used in the composite pattern to represent column condition. Contains subcondition
 * that are concatenated by "and".
 *
 * @author Jens Ehrlich
 */
@JsonTypeName("ColumnConditionAnd")
public class ColumnConditionAnd implements ColumnCondition {

    protected boolean isNegated = false;
    protected float coverage = Float.NaN;
    protected Set<ColumnCondition> columnValues;

    /**
     * Exists for Gwt serialization
     */
    protected ColumnConditionAnd() {
        this.columnValues = new TreeSet<>();
    }

    public ColumnConditionAnd(Map<ColumnIdentifier, String> conditionMap) {
        this();
        for (ColumnIdentifier column : conditionMap.keySet()) {

            columnValues.add(new ColumnConditionValue(column, conditionMap.get(column)));
        }
    }

    public ColumnConditionAnd(TreeSet<ColumnCondition> treeSet) {
        this.columnValues = new TreeSet<>(treeSet);
    }

    public ColumnConditionAnd(ColumnCondition... conditions) {
        this();
        for (ColumnCondition condition : conditions) {
            this.columnValues.add(condition);
        }
    }

    public Set<ColumnCondition> getColumnValues() {
        return columnValues;
    }

    public void setColumnValues(Set<ColumnCondition> columnValues) {
        this.columnValues = columnValues;
    }

    public boolean isNegated() {
        return isNegated;
    }

    public void setNegated(boolean isNegated) {
        this.isNegated = isNegated;
    }

    @Override
    public float getCoverage() {
        if (Float.isNaN(this.coverage)) {
            float coverage = Float.MAX_VALUE;
            for (ColumnCondition subCondition : this.columnValues) {
                if (coverage > subCondition.getCoverage()) {
                    coverage = subCondition.getCoverage();
                }
            }
            return coverage;
        } else {
            return this.coverage;
        }
    }

    @Override
    public void setCoverage(float coverage) {
        this.coverage = coverage;
    }

    @Override
    public ColumnCondition add(ColumnCondition condition) {
        this.columnValues.add(condition);
        return this;
    }

    @Override
    @JsonIgnore
    public TreeSet<ColumnIdentifier> getContainedColumns() {
        TreeSet<ColumnIdentifier> result = new TreeSet<>();
        for (ColumnCondition subElement : this.columnValues) {
            result.addAll(subElement.getContainedColumns());
        }
        return result;
    }

    @Override
    @JsonIgnore
    public List<Map<ColumnIdentifier, String>> getPatternConditions() {
        List<Map<ColumnIdentifier, String>> result = new LinkedList<>();
        Map<ColumnIdentifier, String> condition = new TreeMap<>();
        for (ColumnCondition columnCondition : this.columnValues) {
            condition.putAll(columnCondition.getPatternConditions().get(0));
        }
        result.add(condition);
        return result;
    }

    @Override
    public int compareTo(ColumnCondition o) {
        if (o instanceof ColumnConditionAnd) {
            ColumnConditionAnd other = (ColumnConditionAnd) o;
            int lengthComparison = this.columnValues.size() - other.columnValues.size();
            if (lengthComparison != 0) {
                return lengthComparison;
            } else {
                Iterator<ColumnCondition> otherIterator = other.columnValues.iterator();
                int equalCount = 0;

                while (otherIterator.hasNext()) {
                    ColumnCondition currentOther = otherIterator.next();
                    // because the order of the single column values can differ,
                    // you have to compare all permutations
                    for (ColumnCondition currentThis : this.columnValues) {
                        int currentComparison = currentThis.compareTo(currentOther);
                        if (currentComparison == 0) {
                            equalCount++;
                        }
                    }
                }

                if (equalCount == this.columnValues.size())
                    return 0;
                else
                    return 1;
            }
        } else {
            //and always last
            return 1;
        }
    }

    @Override
    public String toString() {
        String delimiter = " " + AND + " ";
        StringBuilder builder = new StringBuilder();
        if (isNegated) {
            builder.append(NOT);
        }
        builder.append(OPEN_BRACKET);
        for (ColumnCondition value : this.columnValues) {
            builder.append(value.toString());
            builder.append(delimiter);
        }
        return builder.substring(0, builder.length() - delimiter.length()).concat(CLOSE_BRACKET);
    }

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

        ColumnConditionAnd that = (ColumnConditionAnd) o;

        if (isNegated != that.isNegated) {
            return false;
        }
        if (columnValues != null ? !columnValues.equals(that.columnValues) : that.columnValues != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = (isNegated ? 1 : 0);
        result = 31 * result + (columnValues != null ? columnValues.hashCode() : 0);
        return result;
    }
}