org.sunnycode.schema.Schema.java Source code

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Here is the source code for org.sunnycode.schema.Schema.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.sunnycode.schema;

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

import org.sunnycode.schema.Attribute.Type;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;

/**
 * Schema definition class - the main entry point for schema creation.
 */
@JsonIgnoreProperties(ignoreUnknown = true)
public class Schema {
    public static Schema SCHEMA_SCHEMA = (new Builder()).addAttribute("attributes", Type.ARRAY, false).build();

    private final List<Attribute> attributes;
    private final Map<String, Attribute> attributeMap;

    @JsonCreator
    public Schema(@JsonProperty("attributes") List<Attribute> attributes) {
        if (attributes == null) {
            throw new IllegalArgumentException("'attributes' must be present");
        }

        this.attributes = Collections.unmodifiableList(attributes);

        Map<String, Attribute> newAttributes = new LinkedHashMap<String, Attribute>();
        for (Attribute attr : attributes) {
            newAttributes.put(attr.getName(), attr);
        }

        this.attributeMap = Collections.unmodifiableMap(newAttributes);
    }

    public List<Attribute> getAttributes() {
        return attributes;
    }

    @JsonIgnore
    public Attribute getAttribute(String name) {
        return attributeMap.get(name);
    }

    public static class Builder {
        private List<Attribute> attributes = new ArrayList<Attribute>();

        public Builder addAttribute(String name, Type type, boolean nullable) {
            this.attributes.add(new Attribute(name, type, null, nullable));

            return this;
        }

        public Builder addAttribute(String name, Type type, List<Object> values, boolean nullable) {
            this.attributes.add(new Attribute(name, type, values, nullable));

            return this;
        }

        public Schema build() {
            return new Schema(attributes);
        }
    }
}