/*
* 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.facebook.presto.metadata;
import com.facebook.presto.spi.type.Type;
import com.google.common.collect.ImmutableMap;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
public class BoundVariables
{
private final Map<String, Type> typeVariables;
private final Map<String, Long> longVariables;
public BoundVariables(Map<String, Type> typeVariables,
Map<String, Long> longVariables)
{
requireNonNull(typeVariables, "typeVariableBindings is null");
requireNonNull(longVariables, "longVariableBindings is null");
this.typeVariables = ImmutableMap.copyOf(typeVariables);
this.longVariables = ImmutableMap.copyOf(longVariables);
}
public Type getTypeVariable(String variableName)
{
return getValue(typeVariables, variableName);
}
public boolean containsTypeVariable(String variableName)
{
return containsValue(typeVariables, variableName);
}
public Map<String, Type> getTypeVariables()
{
return typeVariables;
}
public Long getLongVariable(String variableName)
{
return getValue(longVariables, variableName);
}
public boolean containsLongVariable(String variableName)
{
return containsValue(longVariables, variableName);
}
public Map<String, Long> getLongVariables()
{
return longVariables;
}
private static <T> T getValue(Map<String, T> map, String variableName)
{
checkState(variableName != null, "variableName is null");
T value = map.get(variableName);
checkState(value != null, "value for variable '%s' is null", variableName);
return value;
}
private static boolean containsValue(Map<String, ?> map, String variableName)
{
checkState(variableName != null, "variableName is null");
return map.containsKey(variableName);
}
private static <T> void setValue(Map<String, T> map, String variableName, T value)
{
checkState(variableName != null, "variableName is null");
checkState(value != null, "value for variable '%s' is null", variableName);
map.put(variableName, value);
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
BoundVariables that = (BoundVariables) o;
return Objects.equals(typeVariables, that.typeVariables) &&
Objects.equals(longVariables, that.longVariables);
}
@Override
public int hashCode()
{
return Objects.hash(typeVariables, longVariables);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("typeVariables", typeVariables)
.add("longVariables", longVariables)
.toString();
}
public static Builder builder()
{
return new Builder();
}
public static class Builder
{
private final Map<String, Type> typeVariables = new HashMap<>();
private final Map<String, Long> longVariables = new HashMap<>();
public Type getTypeVariable(String variableName)
{
return getValue(typeVariables, variableName);
}
public Builder setTypeVariable(String variableName, Type variableValue)
{
setValue(typeVariables, variableName, variableValue);
return this;
}
public boolean containsTypeVariable(String variableName)
{
return containsValue(typeVariables, variableName);
}
public Map<String, Type> getTypeVariables()
{
return typeVariables;
}
public Long getLongVariable(String variableName)
{
return getValue(longVariables, variableName);
}
public Builder setLongVariable(String variableName, Long variableValue)
{
setValue(longVariables, variableName, variableValue);
return this;
}
public boolean containsLongVariable(String variableName)
{
return containsValue(longVariables, variableName);
}
public Map<String, Long> getLongVariables()
{
return longVariables;
}
public BoundVariables build()
{
return new BoundVariables(typeVariables, longVariables);
}
}
}