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Squarespace template compiler

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/**
 * Copyright (c) 2014 SQUARESPACE, Inc.
 *
 * 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 com.squarespace.template;

import java.util.ArrayList;
import java.util.List;


/**
 * Symbol table holding all active formatters.
 */
public class FormatterTable extends SymbolTable {

  /**
   * Default number of hash buckets for the {@link Formatter} symbol table.
   */
  private static final int NUM_BUCKETS = 64;

  /**
   * List of identifiers of the {@link Formatter}s that have been registered.
   */
  private final List symbolList = new ArrayList<>();

  /**
   * Constructs a formatter table with the default number of hash buckets
   */
  public FormatterTable() {
    super(NUM_BUCKETS);
  }

  /**
   * Constructs a formatter table with the specified number of hash buckets.
   */
  public FormatterTable(int numBuckets) {
    super(numBuckets);
  }

  public void initialize(Compiler compiler) {
    setInUse();
    for (Formatter formatter : values()) {
      try {
        formatter.initialize(compiler);
      } catch (CodeException e) {
        throw new IllegalStateException(e.toString(), e);
      }
    }
  }

  /**
   * Returns the list of identifiers of the formatters that have been registered.
   */
  public String[] getSymbols() {
    return symbolList.toArray(Constants.EMPTY_ARRAY_OF_STRING);
  }

  public void register(FormatterRegistry registry) {
    registry.registerFormatters(this);
  }

  /**
   * Callback to cast the Formatter and store it in the table.
   */
  @Override
  public void add(Formatter formatter) {
    put(new StringView(formatter.identifier()), formatter);
    symbolList.add(formatter.identifier());
  }

}