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com.jn.sqlhelper.springjdbc.statement.PreparedStatementCreatorImpl Maven / Gradle / Ivy
/*
* Copyright 2019 the original author or authors.
*
* Licensed under the LGPL, Version 3.0 (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.gnu.org/licenses/lgpl-3.0.html
*
* 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.jn.sqlhelper.springjdbc.statement;
import com.jn.langx.annotation.Nullable;
import com.jn.langx.util.Throwables;
import com.jn.langx.util.collection.Collects;
import com.jn.langx.util.collection.Pipeline;
import com.jn.langx.util.function.Consumer2;
import com.jn.langx.util.reflect.Reflects;
import com.jn.langx.util.struct.Entry;
import com.jn.langx.util.struct.Pair;
import com.jn.sqlhelper.dialect.pagination.PagedPreparedParameterSetter;
import com.jn.sqlhelper.dialect.pagination.QueryParameters;
import org.springframework.dao.InvalidDataAccessApiUsageException;
import org.springframework.jdbc.core.*;
import org.springframework.util.Assert;
import java.lang.reflect.Field;
import java.sql.*;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class PreparedStatementCreatorImpl implements PreparedStatementCreator, PreparedStatementSetter, SqlProvider, ParameterDisposer, PagedPreparedParameterSetter {
private final String actualSql;
private final List parameters;
private List declaredParameters;
private int resultSetType = ResultSet.TYPE_FORWARD_ONLY;
private boolean updatableResults = false;
private boolean returnGeneratedKeys = false;
@Nullable
private String[] generatedKeysColumnNames;
public PreparedStatementCreatorImpl(String actualSql, List declaredParameters, List parameters) {
this.actualSql = actualSql;
Assert.notNull(parameters, "Parameters List must not be null");
this.parameters = parameters;
if (this.parameters.size() != declaredParameters.size()) {
// Account for named parameters being used multiple times
Set names = new HashSet();
for (int i = 0; i < parameters.size(); i++) {
Object param = parameters.get(i);
if (param instanceof SqlParameterValue) {
names.add(((SqlParameterValue) param).getName());
} else {
names.add("Parameter #" + i);
}
}
if (names.size() != declaredParameters.size()) {
throw new InvalidDataAccessApiUsageException(
"SQL [" + actualSql + "]: given " + names.size() +
" parameters but expected " + declaredParameters.size());
}
}
}
@Override
public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
PreparedStatement ps;
if (generatedKeysColumnNames != null || returnGeneratedKeys) {
if (generatedKeysColumnNames != null) {
ps = con.prepareStatement(this.actualSql, generatedKeysColumnNames);
} else {
ps = con.prepareStatement(this.actualSql, PreparedStatement.RETURN_GENERATED_KEYS);
}
} else if (resultSetType == ResultSet.TYPE_FORWARD_ONLY && !updatableResults) {
ps = con.prepareStatement(this.actualSql);
} else {
ps = con.prepareStatement(this.actualSql, resultSetType,
updatableResults ? ResultSet.CONCUR_UPDATABLE : ResultSet.CONCUR_READ_ONLY);
}
setValues(ps);
return ps;
}
@Override
public void setValues(PreparedStatement ps) throws SQLException {
// Set arguments: Does nothing if there are no parameters.
int sqlColIndx = 1;
for (int i = 0; i < this.parameters.size(); i++) {
Object in = this.parameters.get(i);
SqlParameter declaredParameter;
// SqlParameterValue overrides declared parameter meta-data, in particular for
// independence from the declared parameter position in case of named parameters.
if (in instanceof SqlParameterValue) {
SqlParameterValue paramValue = (SqlParameterValue) in;
in = paramValue.getValue();
declaredParameter = paramValue;
} else {
if (declaredParameters.size() <= i) {
throw new InvalidDataAccessApiUsageException(
"SQL [" + actualSql + "]: unable to access parameter number " + (i + 1) +
" given only " + declaredParameters.size() + " parameters");
}
declaredParameter = declaredParameters.get(i);
}
if (in instanceof Iterable && declaredParameter.getSqlType() != Types.ARRAY) {
Iterable entries = (Iterable) in;
for (Object entry : entries) {
if (entry instanceof Object[]) {
Object[] valueArray = (Object[]) entry;
for (Object argValue : valueArray) {
StatementCreatorUtils.setParameterValue(ps, sqlColIndx++, declaredParameter, argValue);
}
} else {
StatementCreatorUtils.setParameterValue(ps, sqlColIndx++, declaredParameter, entry);
}
}
} else {
StatementCreatorUtils.setParameterValue(ps, sqlColIndx++, declaredParameter, in);
}
}
}
@Override
public String getSql() {
return actualSql;
}
@Override
public void cleanupParameters() {
StatementCreatorUtils.cleanupParameters(this.parameters);
}
@Override
public String toString() {
return "PreparedStatementCreator: sql=[" + actualSql + "]; parameters=" + this.parameters;
}
/**
* Set whether to use prepared statements that return a specific type of ResultSet.
*
* @param resultSetType the ResultSet type
* @see java.sql.ResultSet#TYPE_FORWARD_ONLY
* @see java.sql.ResultSet#TYPE_SCROLL_INSENSITIVE
* @see java.sql.ResultSet#TYPE_SCROLL_SENSITIVE
*/
public void setResultSetType(int resultSetType) {
this.resultSetType = resultSetType;
}
/**
* Set whether to use prepared statements capable of returning updatable ResultSets.
*/
public void setUpdatableResults(boolean updatableResults) {
this.updatableResults = updatableResults;
}
/**
* Set whether prepared statements should be capable of returning auto-generated keys.
*/
public void setReturnGeneratedKeys(boolean returnGeneratedKeys) {
this.returnGeneratedKeys = returnGeneratedKeys;
}
/**
* Set the column names of the auto-generated keys.
*/
public void setGeneratedKeysColumnNames(String... names) {
this.generatedKeysColumnNames = names;
}
@Override
public int setBeforeSubqueryParameters(PreparedStatement statement, QueryParameters queryParameters, int startIndex) throws SQLException {
List> parameters = flatParameters();
return setSqlParameters(statement, Collects.limit(parameters, queryParameters.getBeforeSubqueryParameterCount()), startIndex);
}
@Override
public int setSubqueryParameters(PreparedStatement statement, QueryParameters queryParameters, int startIndex) throws SQLException {
List> parameters = flatParameters();
Collection> p = Pipeline.of(parameters)
.limit(parameters.size() - queryParameters.getAfterSubqueryParameterCount())
.skip(queryParameters.getBeforeSubqueryParameterCount()).asList();
return setSqlParameters(statement, p, startIndex);
}
@Override
public int setAfterSubqueryParameters(PreparedStatement statement, QueryParameters queryParameters, int startIndex) throws SQLException {
List> parameters = flatParameters();
return setSqlParameters(statement, Collects.skip(parameters, parameters.size() - queryParameters.getAfterSubqueryParameterCount()), startIndex);
}
@Override
public int setOriginalParameters(PreparedStatement statement, QueryParameters queryParameters, int startIndex) throws SQLException {
List> parameters = flatParameters();
return setSqlParameters(statement, parameters, 1);
}
private int setSqlParameters(final PreparedStatement statement, Collection> parameters, final int startIndex) {
Collects.forEach(parameters, new Consumer2>() {
@Override
public void accept(Integer index, Pair pair) {
try {
StatementCreatorUtils.setParameterValue(statement, index + startIndex, pair.getKey(), pair.getValue());
} catch (SQLException ex) {
throw Throwables.wrapAsRuntimeException(ex);
}
}
});
return parameters.size();
}
private List> flatParameters() {
final List> ret = Collects.emptyArrayList();
Collects.forEach(this.parameters, new Consumer2() {
@Override
public void accept(Integer i, Object in) {
SqlParameter declaredParameter;
// SqlParameterValue overrides declared parameter meta-data, in particular for
// independence from the declared parameter position in case of named parameters.
if (in instanceof SqlParameterValue) {
SqlParameterValue paramValue = (SqlParameterValue) in;
in = paramValue.getValue();
declaredParameter = paramValue;
} else {
if (declaredParameters.size() <= i) {
throw new InvalidDataAccessApiUsageException(
"SQL [" + getSql() + "]: unable to access parameter number " + (i + 1) +
" given only " + declaredParameters.size() + " parameters");
}
declaredParameter = declaredParameters.get(i);
}
if (in instanceof Collection && declaredParameter.getSqlType() != Types.ARRAY) {
Collection entries = (Collection) in;
for (Object entry : entries) {
if (entry instanceof Object[]) {
Object[] valueArray = ((Object[]) entry);
for (Object argValue : valueArray) {
ret.add(new Entry(declaredParameter, argValue));
}
} else {
ret.add(new Entry(declaredParameter, entry));
}
}
} else {
ret.add(new Entry(declaredParameter, in));
}
}
});
return ret;
}
public static class Factory {
private static Field actualSqlField; // String
private static Field parametersField; //List
private static Field declaredParametersField; //List
private static Field resultSetTypeField; // int, default: ResultSet.TYPE_FORWARD_ONLY
private static Field updatableResultsField; //boolean, default: false
private static Field returnGeneratedKeysField; //boolean, default: false
@Nullable
private static Field generatedKeysColumnNamesField; // String[]
public static PreparedStatementCreatorImpl creator(Object instance) {
Class clazz = instance.getClass();
if (actualSqlField == null) {
actualSqlField = Reflects.getDeclaredField(clazz, "actualSql");
}
if (parametersField == null) {
parametersField = Reflects.getDeclaredField(clazz, "parameters");
}
String actualSql = Reflects.getFieldValue(actualSqlField, instance, true, false);
List parameters = Reflects.getFieldValue(parametersField, instance, true, false);
return new PreparedStatementCreatorImpl(actualSql, null, parameters);
}
}
}
