com.google.javascript.jscomp.newtypes.TypeWithPropertiesStatics Maven / Gradle / Ivy

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Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs. This binary checks for style issues such as incorrect or missing JSDoc usage, and missing goog.require() statements. It does not do more advanced checks such as typechecking.

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/*
 * Copyright 2014 The Closure Compiler 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 com.google.javascript.jscomp.newtypes;

import com.google.common.collect.ImmutableSet;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

/**
 * Static methods that operate on {@code TypeWithProperties} instances.
 */
final class TypeWithPropertiesStatics {

  // Never create any instances of this class
  private TypeWithPropertiesStatics() {}

  static JSType getProp(
      ImmutableSet types, QualifiedName qname) {
    if (types == null) {
      return null;
    }
    JSType ptype = null;
    for (TypeWithProperties t : types) {
      if (t.mayHaveProp(qname)) {
        JSType tmp = t.getProp(qname);
        ptype = ptype == null ? tmp : JSType.join(ptype, tmp);
      }
    }
    return ptype;
  }

  static JSType getDeclaredProp(
      ImmutableSet types, QualifiedName qname) {
    if (types == null) {
      return null;
    }
    JSType ptype = null;
    for (TypeWithProperties t : types) {
      if (t.mayHaveProp(qname)) {
        JSType declType = t.getDeclaredProp(qname);
        if (declType != null) {
          ptype = ptype == null ? declType : JSType.join(ptype, declType);
        }
      }
    }
    return ptype;
  }

  static Collection getSubtypesWithProperty(
      ImmutableSet types, QualifiedName qname) {
    if (types == null) {
      return ImmutableSet.of();
    }
    Set typesWithProp = new HashSet<>();
    for (TypeWithProperties t : types) {
      typesWithProp.addAll(t.getSubtypesWithProperty(qname));
    }
    return typesWithProp;
  }

  static boolean mayHaveProp(
      ImmutableSet types, QualifiedName qname) {
    if (types == null) {
      return false;
    }
    for (TypeWithProperties t : types) {
      if (t.mayHaveProp(qname)) {
        return true;
      }
    }
    return false;
  }

  static boolean hasProp(
      ImmutableSet types, QualifiedName qname) {
    if (types == null) {
      return false;
    }
    for (TypeWithProperties t : types) {
      if (!t.hasProp(qname)) {
        return false;
      }
    }
    return true;
  }

  static boolean hasConstantProp(
      ImmutableSet types, QualifiedName qname) {
    if (types == null) {
      return false;
    }
    for (TypeWithProperties t : types) {
      if (t.hasConstantProp(qname)) {
        return true;
      }
    }
    return false;
  }
}