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core module for querydsl
There is a newer version: 6.8
/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * 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.querydsl.core;

import com.querydsl.core.types.Expression;
import com.querydsl.core.types.OrderSpecifier;
import com.querydsl.core.types.ParamExpression;
import com.querydsl.core.types.Predicate;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * {@code EmptyMetadata} provides an immutable empty {@link QueryMetadata} instance.
 *
 * Modification methods throw {@link UnsupportedOperationException}.
 *
 * @author tiwe
 */
public final class EmptyMetadata implements QueryMetadata {

  private static final long serialVersionUID = 134750105981272499L;

  public static final QueryMetadata DEFAULT = new EmptyMetadata();

  @Override
  public void addGroupBy(Expression o) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addHaving(Predicate o) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addJoin(JoinType joinType, Expression expr) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addJoinCondition(Predicate o) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addOrderBy(OrderSpecifier o) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setProjection(Expression o) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addWhere(Predicate o) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void clearOrderBy() {
    throw new UnsupportedOperationException();
  }

  @Override
  public void clearWhere() {
    throw new UnsupportedOperationException();
  }

  @Override
  public QueryMetadata clone() {
    return this;
  }

  @Override
  public List> getGroupBy() {
    return Collections.emptyList();
  }

  @Override
  public Predicate getHaving() {
    return null;
  }

  @Override
  public List getJoins() {
    return Collections.emptyList();
  }

  @Override
  public QueryModifiers getModifiers() {
    return null;
  }

  @Override
  public List> getOrderBy() {
    return Collections.emptyList();
  }

  @Override
  public Expression getProjection() {
    return null;
  }

  @Override
  public Map, Object> getParams() {
    return Collections.emptyMap();
  }

  @Override
  public Predicate getWhere() {
    return null;
  }

  @Override
  public boolean isDistinct() {
    return false;
  }

  @Override
  public boolean isUnique() {
    return false;
  }

  @Override
  public void reset() {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setDistinct(boolean distinct) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setLimit(Long limit) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setModifiers(QueryModifiers restriction) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setOffset(Long offset) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setUnique(boolean unique) {
    throw new UnsupportedOperationException();
  }

  @Override
  public  void setParam(ParamExpression param, T value) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addFlag(QueryFlag flag) {
    throw new UnsupportedOperationException();
  }

  @Override
  public boolean hasFlag(QueryFlag flag) {
    return false;
  }

  @Override
  public Set getFlags() {
    return Collections.emptySet();
  }

  @Override
  public void setValidate(boolean v) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void addJoinFlag(JoinFlag flag) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void removeFlag(QueryFlag flag) {}
}