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The AceQL Java Client JDBC Driver allows to wrap the AceQL HTTP APIs and eliminates the tedious works of handling communications errors and parsing JSON results. Android and Java Desktop application developers can access remote SQL databases and/or SQL databases in the cloud by simply including standard JDBC calls in their code, just like they would for a local database.
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/*
 * This file is part of AceQL JDBC Driver.
 * AceQL JDBC Driver: Remote JDBC access over HTTP with AceQL HTTP.                                 
 * Copyright (c) 2023,  KawanSoft SAS
 * (http://www.kawansoft.com). All rights reserved.                                
 *                                                                               
 * 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.aceql.jdbc.commons.main.abstracts;

import java.sql.ResultSetMetaData;
import java.sql.SQLException;

/**
 * ResultSetMetaData Wrapper. 

 * Implements all the ResultSetMetaData methods. Usage is exactly the same as a
 * ResultSetMetaData.
 * 
 */

public abstract class AbstractResultSetMetaData implements ResultSetMetaData {

    /** Flag that says the caller is ConnectionHttp */
    private boolean isConnectionHttp = false;

    /**
     * Constructor
     */
    public AbstractResultSetMetaData() {
	this.isConnectionHttp = true;
    }

    /**
     * Constructor
     * 
     * @param isConnectionHttp
     *            Flag that says the caller is ConnectionHttp
     */
    public AbstractResultSetMetaData(boolean isConnectionHttp) {
	this.isConnectionHttp = isConnectionHttp;
    }

    /**
     * Will throw a SQL Exception if callin method is not authorized
     **/
    protected void verifyCallAuthorization(String methodName)
	    throws SQLException {

	if (isConnectionHttp) {
	    throw new SQLException(
		    AbstractConnection.FEATURE_NOT_SUPPORTED_IN_THIS_VERSION
		    + methodName);
	}
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.Wrapper#unwrap(java.lang.Class)
     */
    @Override
    public  T unwrap(Class iface) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.Wrapper#isWrapperFor(java.lang.Class)
     */
    @Override
    public boolean isWrapperFor(Class iface) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnCount()
     */
    @Override
    public int getColumnCount() throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return 0;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isAutoIncrement(int)
     */
    @Override
    public boolean isAutoIncrement(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isCaseSensitive(int)
     */
    @Override
    public boolean isCaseSensitive(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isSearchable(int)
     */
    @Override
    public boolean isSearchable(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isCurrency(int)
     */
    @Override
    public boolean isCurrency(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isNullable(int)
     */
    @Override
    public int isNullable(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return 0;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isSigned(int)
     */
    @Override
    public boolean isSigned(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnDisplaySize(int)
     */
    @Override
    public int getColumnDisplaySize(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return 0;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnLabel(int)
     */
    @Override
    public String getColumnLabel(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnName(int)
     */
    @Override
    public String getColumnName(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getSchemaName(int)
     */
    @Override
    public String getSchemaName(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getPrecision(int)
     */
    @Override
    public int getPrecision(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return 0;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getScale(int)
     */
    @Override
    public int getScale(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return 0;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getTableName(int)
     */
    @Override
    public String getTableName(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getCatalogName(int)
     */
    @Override
    public String getCatalogName(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnType(int)
     */
    @Override
    public int getColumnType(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return 0;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnTypeName(int)
     */
    @Override
    public String getColumnTypeName(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isReadOnly(int)
     */
    @Override
    public boolean isReadOnly(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isWritable(int)
     */
    @Override
    public boolean isWritable(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#isDefinitelyWritable(int)
     */
    @Override
    public boolean isDefinitelyWritable(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.sql.ResultSetMetaData#getColumnClassName(int)
     */
    @Override
    public String getColumnClassName(int column) throws SQLException {
	String methodName = new Object() {
	}.getClass().getEnclosingMethod().getName();
	verifyCallAuthorization(methodName);
	return null;
    }

}