io.kazuki.v0.store.schema.model.IndexDefinition.java Source code

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Here is the source code for io.kazuki.v0.store.schema.model.IndexDefinition.java

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/**
 * Copyright 2014 Sunny Gleason and original author or authors
 *
 * 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 io.kazuki.v0.store.schema.model;

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

import javax.annotation.Nullable;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.google.common.base.Preconditions;

/**
 * Object class for an index definition, including name and column definitions.
 */
public class IndexDefinition {
    private final String name;
    private final List<IndexAttribute> indexColumns;
    private final List<String> attributeNames;
    private final boolean unique;
    private final Map<String, IndexAttribute> indexAttributeMap;
    private final String renameOf;

    @JsonCreator
    public IndexDefinition(@JsonProperty("name") String name, @JsonProperty("cols") List<IndexAttribute> cols,
            @JsonProperty("unique") @Nullable Boolean unique, @JsonProperty("renameOf") @Nullable String renameOf) {
        Preconditions.checkNotNull(name, "name");
        Preconditions.checkNotNull(cols, "cols");
        Preconditions.checkArgument(!cols.isEmpty(), "cols");

        this.name = name;
        this.unique = (unique != null && unique);

        List<String> newAttributeNames = new ArrayList<String>();
        Map<String, IndexAttribute> newIndexAttributeMap = new LinkedHashMap<String, IndexAttribute>();

        for (IndexAttribute attr : cols) {
            String attrName = attr.getName();

            if (newIndexAttributeMap.containsKey(attrName)) {
                throw new IllegalArgumentException("index definition contains duplicate attribute: " + attrName);
            }

            newAttributeNames.add(attrName);
            newIndexAttributeMap.put(attrName, attr);
        }

        if (newIndexAttributeMap.containsKey("id")) {
            throw new IllegalArgumentException("index definition must not contain 'id' attribute");
        }

        this.indexColumns = Collections.unmodifiableList(cols);
        this.attributeNames = Collections.unmodifiableList(newAttributeNames);
        this.indexAttributeMap = Collections.unmodifiableMap(newIndexAttributeMap);
        this.renameOf = renameOf;
    }

    public String getName() {
        return name;
    }

    public boolean isUnique() {
        return unique;
    }

    @JsonIgnore
    public List<String> getAttributeNames() {
        return attributeNames;
    }

    @JsonIgnore
    public IndexAttribute getIndexAttribute(String attrName) {
        return this.indexAttributeMap.get(attrName);
    }

    @JsonProperty("cols")
    public List<IndexAttribute> getIndexAttributes() {
        return indexColumns;
    }

    @JsonIgnore
    public Map<String, IndexAttribute> getIndexAttributeMap() {
        return indexAttributeMap;
    }

    @JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
    public String getRenameOf() {
        return renameOf;
    }
}