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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
 *
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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 *
 * Modifications:
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package org.glassfish.persistence.jpa.schemageneration;

import com.sun.enterprise.deployment.PersistenceUnitDescriptor;
import org.glassfish.api.deployment.DeploymentContext;

import java.io.CharArrayReader;
import java.util.HashMap;
import java.util.Map;


/**
 * Schema generation processor while using standard JPA based schema generation
 * @author Mitesh Meswani
 */
public class JPAStandardSchemaGenerationProcessor implements SchemaGenerationProcessor {
    private static final String SCHEMA_GENERATION_DATABASE_ACTION_PROPERTY = "jakarta.persistence.schema-generation.database.action";
    private static final String SCHEMA_GENERATION_SCRIPTS_ACTION_PROPERTY = "jakarta.persistence.schema-generation.scripts.action";
    private static final String SQL_LOAD_SCRIPT_SOURCE = "jakarta.persistence.sql_load-script-source";

    private static final String SCHEMA_GENERATION_ACTION_NONE = "none";

    @Override
    public void init(PersistenceUnitDescriptor pud, DeploymentContext deploymentContext) {
        // Nothing to init
    }

    @Override
    public Map getOverridesForSchemaGeneration() {
        // No override is needed now. When we wire in taking schema generation overrides from deploy CLI, this method will return corresponding overrides.
        return null;
    }

    @Override
    public Map getOverridesForSuppressingSchemaGeneration() {
        Map overrides = new HashMap<>();

        overrides.put(SCHEMA_GENERATION_DATABASE_ACTION_PROPERTY, SCHEMA_GENERATION_ACTION_NONE); // suppress database action
        overrides.put(SCHEMA_GENERATION_SCRIPTS_ACTION_PROPERTY, SCHEMA_GENERATION_ACTION_NONE);  // suppress script action
        overrides.put(SQL_LOAD_SCRIPT_SOURCE, new CharArrayReader(new char[0])); // suppress execution of load scripts

        return overrides;
    }

    @Override
    public boolean isContainerDDLExecutionRequired() {
        // DDL execution is done by JPA provider.
        return false;
    }

    @Override
    public void executeCreateDDL() {
        // We should never reach here as this processor returns false for isContainerDDLExecutionRequired()
        throw new UnsupportedOperationException();
    }
}