nl.topicus.jdbc.shaded.com.google.cloud.spanner.AbstractStructReader Maven / Gradle / Ivy
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/*
* Copyright 2017 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in nl.topicus.jdbc.shaded.com.liance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.nl.topicus.jdbc.shaded.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 nl.topicus.jdbc.shaded.com.google.cloud.spanner;
import static nl.topicus.jdbc.shaded.com.google.nl.topicus.jdbc.shaded.com.on.base.Preconditions.checkState;
import nl.topicus.jdbc.shaded.com.google.cloud.ByteArray;
import nl.topicus.jdbc.shaded.com.google.cloud.Date;
import nl.topicus.jdbc.shaded.com.google.cloud.Timestamp;
import java.util.List;
/**
* Base class for assisting {@link StructReader} implementations.
*
* This class implements the majority of the {@code StructReader} interface, leaving subclasses
* to implement core data access via the {@code getTypeNameInternal()} methods. {@code
* AbstractStructReader} guarantees that these will only be called for non-{@code NULL} columns of a
* type appropriate for the method.
*/
public abstract class AbstractStructReader implements StructReader {
protected abstract boolean getBooleanInternal(int columnIndex);
protected abstract long getLongInternal(int columnIndex);
protected abstract double getDoubleInternal(int columnIndex);
protected abstract String getStringInternal(int columnIndex);
protected abstract ByteArray getBytesInternal(int columnIndex);
protected abstract Timestamp getTimestampInternal(int columnIndex);
protected abstract Date getDateInternal(int columnIndex);
protected abstract boolean[] getBooleanArrayInternal(int columnIndex);
protected abstract List getBooleanListInternal(int columnIndex);
protected abstract long[] getLongArrayInternal(int columnIndex);
protected abstract List getLongListInternal(int columnIndex);
protected abstract double[] getDoubleArrayInternal(int columnIndex);
protected abstract List getDoubleListInternal(int columnIndex);
protected abstract List getStringListInternal(int columnIndex);
protected abstract List getBytesListInternal(int columnIndex);
protected abstract List getTimestampListInternal(int columnIndex);
protected abstract List getDateListInternal(int columnIndex);
protected abstract List getStructListInternal(int columnIndex);
@Override
public int getColumnCount() {
return getType().getStructFields().size();
}
@Override
public Type getColumnType(int columnIndex) {
return getType().getStructFields().get(columnIndex).getType();
}
@Override
public Type getColumnType(String columnName) {
return getType().getStructFields().get(getColumnIndex(columnName)).getType();
}
@Override
public boolean isNull(String columnName) {
return isNull(getColumnIndex(columnName));
}
@Override
public boolean getBoolean(int columnIndex) {
checkNonNullOfType(columnIndex, Type.bool(), columnIndex);
return getBooleanInternal(columnIndex);
}
@Override
public boolean getBoolean(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.bool(), columnName);
return getBooleanInternal(columnIndex);
}
@Override
public long getLong(int columnIndex) {
checkNonNullOfType(columnIndex, Type.int64(), columnIndex);
return getLongInternal(columnIndex);
}
@Override
public long getLong(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.int64(), columnName);
return getLongInternal(columnIndex);
}
@Override
public double getDouble(int columnIndex) {
checkNonNullOfType(columnIndex, Type.float64(), columnIndex);
return getDoubleInternal(columnIndex);
}
@Override
public double getDouble(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.float64(), columnName);
return getDoubleInternal(columnIndex);
}
@Override
public String getString(int columnIndex) {
checkNonNullOfType(columnIndex, Type.string(), columnIndex);
return getStringInternal(columnIndex);
}
@Override
public String getString(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.string(), columnName);
return getStringInternal(columnIndex);
}
@Override
public ByteArray getBytes(int columnIndex) {
checkNonNullOfType(columnIndex, Type.bytes(), columnIndex);
return getBytesInternal(columnIndex);
}
@Override
public ByteArray getBytes(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.bytes(), columnName);
return getBytesInternal(columnIndex);
}
@Override
public Timestamp getTimestamp(int columnIndex) {
checkNonNullOfType(columnIndex, Type.timestamp(), columnIndex);
return getTimestampInternal(columnIndex);
}
@Override
public Timestamp getTimestamp(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.timestamp(), columnName);
return getTimestampInternal(columnIndex);
}
@Override
public Date getDate(int columnIndex) {
checkNonNullOfType(columnIndex, Type.date(), columnIndex);
return getDateInternal(columnIndex);
}
@Override
public Date getDate(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.date(), columnName);
return getDateInternal(columnIndex);
}
@Override
public boolean[] getBooleanArray(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.bool()), columnIndex);
return getBooleanArrayInternal(columnIndex);
}
@Override
public boolean[] getBooleanArray(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.bool()), columnName);
return getBooleanArrayInternal(columnIndex);
}
@Override
public List getBooleanList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.bool()), columnIndex);
return getBooleanListInternal(columnIndex);
}
@Override
public List getBooleanList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.bool()), columnName);
return getBooleanListInternal(columnIndex);
}
@Override
public long[] getLongArray(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.int64()), columnIndex);
return getLongArrayInternal(columnIndex);
}
@Override
public long[] getLongArray(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.int64()), columnName);
return getLongArrayInternal(columnIndex);
}
@Override
public List getLongList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.int64()), columnIndex);
return getLongListInternal(columnIndex);
}
@Override
public List getLongList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.int64()), columnName);
return getLongListInternal(columnIndex);
}
@Override
public double[] getDoubleArray(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.float64()), columnIndex);
return getDoubleArrayInternal(columnIndex);
}
@Override
public double[] getDoubleArray(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.float64()), columnName);
return getDoubleArrayInternal(columnIndex);
}
@Override
public List getDoubleList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.float64()), columnIndex);
return getDoubleListInternal(columnIndex);
}
@Override
public List getDoubleList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.float64()), columnName);
return getDoubleListInternal(columnIndex);
}
@Override
public List getStringList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.string()), columnIndex);
return getStringListInternal(columnIndex);
}
@Override
public List getStringList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.string()), columnName);
return getStringListInternal(columnIndex);
}
@Override
public List getBytesList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.bytes()), columnIndex);
return getBytesListInternal(columnIndex);
}
@Override
public List getBytesList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.bytes()), columnName);
return getBytesListInternal(columnIndex);
}
@Override
public List getTimestampList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.timestamp()), columnIndex);
return getTimestampListInternal(columnIndex);
}
@Override
public List getTimestampList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.timestamp()), columnName);
return getTimestampListInternal(columnIndex);
}
@Override
public List getDateList(int columnIndex) {
checkNonNullOfType(columnIndex, Type.array(Type.date()), columnIndex);
return getDateListInternal(columnIndex);
}
@Override
public List getDateList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullOfType(columnIndex, Type.array(Type.date()), columnName);
return getDateListInternal(columnIndex);
}
@Override
public List getStructList(int columnIndex) {
checkNonNullArrayOfStruct(columnIndex, columnIndex);
return getStructListInternal(columnIndex);
}
@Override
public List getStructList(String columnName) {
int columnIndex = getColumnIndex(columnName);
checkNonNullArrayOfStruct(columnIndex, columnName);
return getStructListInternal(columnIndex);
}
@Override
public int getColumnIndex(String columnName) {
// Use the Type instance for field name lookup. Type instances are naturally shared by the
// ResultSet, all Structs corresponding to rows in the read, and all Structs corresponding to
// the values of ARRAY> columns in the read, so this is the best location to
// amortize lookup costs.
return getType().getFieldIndex(columnName);
}
private void checkNonNullOfType(int columnIndex, Type expectedType, Object columnNameForError) {
Type actualType = getColumnType(columnIndex);
checkState(
expectedType.equals(actualType),
"Column %s is not of correct type: expected %s but was %s",
columnNameForError,
expectedType,
actualType);
checkNonNull(columnIndex, columnNameForError);
}
private void checkNonNullArrayOfStruct(int columnIndex, Object columnNameForError) {
Type actualType = getColumnType(columnIndex);
checkState(
actualType.getCode() == Type.Code.ARRAY
&& actualType.getArrayElementType().getCode() == Type.Code.STRUCT,
"Column %s is not of correct type: expected ARRAY> but was %s",
columnNameForError,
actualType);
checkNonNull(columnIndex, columnNameForError);
}
private void checkNonNull(int columnIndex, Object columnNameForError) {
if (isNull(columnIndex)) {
throw new NullPointerException("Column " + columnNameForError + " contains NULL value");
}
}
}