Java tutorial
/* * 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.SchemaTableName; import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonValue; import com.google.common.base.Function; import com.google.common.base.Splitter; import com.google.common.collect.ImmutableList; import javax.annotation.concurrent.Immutable; import java.util.Objects; import static com.facebook.presto.metadata.MetadataUtil.checkTableName; import static com.google.common.base.Preconditions.checkArgument; import static java.util.Objects.requireNonNull; @Immutable public class QualifiedTableName { @JsonCreator public static QualifiedTableName valueOf(String tableName) { requireNonNull(tableName, "tableName is null"); ImmutableList<String> ids = ImmutableList.copyOf(Splitter.on('.').split(tableName)); checkArgument(ids.size() == 3, "Invalid tableName %s", tableName); return new QualifiedTableName(ids.get(0), ids.get(1), ids.get(2)); } private final String catalogName; private final String schemaName; private final String tableName; public QualifiedTableName(String catalogName, String schemaName, String tableName) { checkTableName(catalogName, schemaName, tableName); this.catalogName = catalogName; this.schemaName = schemaName; this.tableName = tableName; } public String getCatalogName() { return catalogName; } public String getSchemaName() { return schemaName; } public String getTableName() { return tableName; } public SchemaTableName asSchemaTableName() { return new SchemaTableName(schemaName, tableName); } @Override public boolean equals(Object obj) { if (obj == this) { return true; } if ((obj == null) || (getClass() != obj.getClass())) { return false; } QualifiedTableName o = (QualifiedTableName) obj; return Objects.equals(catalogName, o.catalogName) && Objects.equals(schemaName, o.schemaName) && Objects.equals(tableName, o.tableName); } @Override public int hashCode() { return Objects.hash(catalogName, schemaName, tableName); } @JsonValue @Override public String toString() { return catalogName + '.' + schemaName + '.' + tableName; } public static Function<SchemaTableName, QualifiedTableName> convertFromSchemaTableName( final String catalogName) { return input -> new QualifiedTableName(catalogName, input.getSchemaName(), input.getTableName()); } }