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/*
* Copyright 2004-2019 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.engine;
import org.h2.message.DbException;
import org.h2.message.Trace;
import org.h2.schema.Schema;
import org.h2.table.Table;
/**
* An access right. Rights are regular database objects, but have generated
* names.
*/
public class Right extends DbObjectBase {
/**
* The right bit mask that means: selecting from a table is allowed.
*/
public static final int SELECT = 1;
/**
* The right bit mask that means: deleting rows from a table is allowed.
*/
public static final int DELETE = 2;
/**
* The right bit mask that means: inserting rows into a table is allowed.
*/
public static final int INSERT = 4;
/**
* The right bit mask that means: updating data is allowed.
*/
public static final int UPDATE = 8;
/**
* The right bit mask that means: create/alter/drop schema is allowed.
*/
public static final int ALTER_ANY_SCHEMA = 16;
/**
* The right bit mask that means: select, insert, update, delete, and update
* for this object is allowed.
*/
public static final int ALL = SELECT | DELETE | INSERT | UPDATE;
/**
* To whom the right is granted.
*/
private RightOwner grantee;
/**
* The granted role, or null if a right was granted.
*/
private Role grantedRole;
/**
* The granted right.
*/
private int grantedRight;
/**
* The object. If the right is global, this is null.
*/
private DbObject grantedObject;
public Right(Database db, int id, RightOwner grantee, Role grantedRole) {
super(db, id, "RIGHT_" + id, Trace.USER);
this.grantee = grantee;
this.grantedRole = grantedRole;
}
public Right(Database db, int id, RightOwner grantee, int grantedRight,
DbObject grantedObject) {
super(db, id, Integer.toString(id), Trace.USER);
this.grantee = grantee;
this.grantedRight = grantedRight;
this.grantedObject = grantedObject;
}
private static boolean appendRight(StringBuilder buff, int right, int mask,
String name, boolean comma) {
if ((right & mask) != 0) {
if (comma) {
buff.append(", ");
}
buff.append(name);
return true;
}
return comma;
}
public String getRights() {
StringBuilder buff = new StringBuilder();
if (grantedRight == ALL) {
buff.append("ALL");
} else {
boolean comma = false;
comma = appendRight(buff, grantedRight, SELECT, "SELECT", comma);
comma = appendRight(buff, grantedRight, DELETE, "DELETE", comma);
comma = appendRight(buff, grantedRight, INSERT, "INSERT", comma);
comma = appendRight(buff, grantedRight, ALTER_ANY_SCHEMA,
"ALTER ANY SCHEMA", comma);
appendRight(buff, grantedRight, UPDATE, "UPDATE", comma);
}
return buff.toString();
}
public Role getGrantedRole() {
return grantedRole;
}
public DbObject getGrantedObject() {
return grantedObject;
}
public DbObject getGrantee() {
return grantee;
}
@Override
public String getDropSQL() {
return null;
}
@Override
public String getCreateSQLForCopy(Table table, String quotedName) {
return getCreateSQLForCopy(table);
}
private String getCreateSQLForCopy(DbObject object) {
StringBuilder buff = new StringBuilder();
buff.append("GRANT ");
if (grantedRole != null) {
grantedRole.getSQL(buff);
} else {
buff.append(getRights());
if (object != null) {
if (object instanceof Schema) {
buff.append(" ON SCHEMA ");
object.getSQL(buff);
} else if (object instanceof Table) {
buff.append(" ON ");
object.getSQL(buff);
}
}
}
buff.append(" TO ");
grantee.getSQL(buff);
return buff.toString();
}
@Override
public String getCreateSQL() {
return getCreateSQLForCopy(grantedObject);
}
@Override
public int getType() {
return DbObject.RIGHT;
}
@Override
public void removeChildrenAndResources(Session session) {
if (grantedRole != null) {
grantee.revokeRole(grantedRole);
} else {
grantee.revokeRight(grantedObject);
}
database.removeMeta(session, getId());
grantedRole = null;
grantedObject = null;
grantee = null;
invalidate();
}
@Override
public void checkRename() {
DbException.throwInternalError();
}
public void setRightMask(int rightMask) {
grantedRight = rightMask;
}
public int getRightMask() {
return grantedRight;
}
}
