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/**
 * DataCleaner (community edition)
 * Copyright (C) 2014 Free Software Foundation, Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.datacleaner.job;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Map;

import org.apache.metamodel.schema.ColumnType;
import org.apache.metamodel.util.BaseObject;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;

/**
 * Immutable implementation of {@link AnalysisJobMetadata}.
 */
public class ImmutableAnalysisJobMetadata extends BaseObject implements AnalysisJobMetadata {

    private final String _jobName;
    private final String _jobVersion;
    private final String _jobDescription;
    private final String _author;
    private final Date _createdDate;
    private final Date _updatedDate;
    private final String _datastoreName;
    private final List _sourceColumnPaths;
    private final Map _variables;
    private final List _sourceColumnTypes;
    private final Map _properties;

    public ImmutableAnalysisJobMetadata(final String jobName, final String jobVersion, final String jobDescription,
            final String author, final Date createdDate, final Date updatedDate, final String datastoreName,
            final List sourceColumnPaths, final List sourceColumnTypes,
            Map variables, final Map properties) {
        _jobName = jobName;
        _jobVersion = jobVersion;
        _jobDescription = jobDescription;
        _author = author;
        _createdDate = createdDate;
        _updatedDate = updatedDate;
        _datastoreName = datastoreName;

        if (properties == null) {
            _properties = Collections.emptyMap();
        } else {
            _properties = ImmutableMap.copyOf(properties);
        }
        if (sourceColumnPaths == null) {
            _sourceColumnPaths = Collections.emptyList();
        } else {
            _sourceColumnPaths = ImmutableList.copyOf(sourceColumnPaths);
        }
        if (sourceColumnTypes == null) {
            _sourceColumnTypes = new ArrayList<>(sourceColumnPaths.size());
        } else {
            // we don't use ImmutableList here because it does not allow nulls
            _sourceColumnTypes = Collections.unmodifiableList(sourceColumnTypes);
        }

        if (variables == null) {
            variables = Collections.emptyMap();
        } else {
            variables = ImmutableMap.copyOf(variables);
        }
        _variables = Collections.unmodifiableMap(variables);
    }

    @Override
    protected void decorateIdentity(final List