Mercurial > hg > release > thermostat-1.0
view storage/core/src/main/java/com/redhat/thermostat/storage/internal/statement/ParsedStatementImpl.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
---|---|
date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | d09fd25379e8 |
children |
line wrap: on
line source
/* * Copyright 2012-2014 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.storage.internal.statement; import com.redhat.thermostat.storage.core.Add; import com.redhat.thermostat.storage.core.IllegalPatchException; import com.redhat.thermostat.storage.core.ParsedStatement; import com.redhat.thermostat.storage.core.PreparedParameter; import com.redhat.thermostat.storage.core.Query; import com.redhat.thermostat.storage.core.Remove; import com.redhat.thermostat.storage.core.Replace; import com.redhat.thermostat.storage.core.Statement; import com.redhat.thermostat.storage.core.Update; import com.redhat.thermostat.storage.model.Pojo; import com.redhat.thermostat.storage.query.Expression; /** * Result object as returned by {@link BasicDescriptorParser#parse()}. * An instance of this plus a list of {@link PreparedParameter} should * be sufficient to patch up a prepared statement with its real values. * * @see PreparedStatementImpl#executeQuery() */ class ParsedStatementImpl<T extends Pojo> implements ParsedStatement<T> { private final Statement<T> statement; private int numParams; private SuffixExpression suffixExpn; private SetList setList; ParsedStatementImpl(Statement<T> statement) { this.statement = statement; } @Override public int getNumParams() { return numParams; } @Override public Statement<T> patchStatement(PreparedParameter[] params) throws IllegalPatchException { if (suffixExpn == null) { String msg = "Suffix expression must be set before patching!"; IllegalStateException expn = new IllegalStateException(msg); throw new IllegalPatchException(expn); } /* * Statements may not be stateless and hence, we need to create a * duplicate prior every patch + execution. */ Statement<T> stmt = statement.getRawDuplicate(); patchSetList(stmt, params); patchWhere(stmt, params); patchSort(stmt, params); patchLimit(stmt, params); // TODO count actual patches and throw an exception if not all vars // have been patched up. return stmt; } private void patchSetList(Statement<T> stmt, PreparedParameter[] params) throws IllegalPatchException { if (setList.getValues().size() == 0) { // no set list, nothing to do return; } // do the patching PatchedSetList patchedSetList = setList.patch(params); // set the values if (stmt instanceof Add) { Add<T> add = (Add<T>)stmt; for (PatchedSetListMember member: patchedSetList.getSetListMembers()) { add.set(member.getKey().getName(), member.getValue()); } } if (stmt instanceof Replace) { Replace<T> replace = (Replace<T>)stmt; for (PatchedSetListMember member: patchedSetList.getSetListMembers()) { replace.set(member.getKey().getName(), member.getValue()); } } if (stmt instanceof Update) { Update<T> update = (Update<T>)stmt; for (PatchedSetListMember member: patchedSetList.getSetListMembers()) { update.set(member.getKey().getName(), member.getValue()); } } } private void patchLimit(Statement<T> stmt, PreparedParameter[] params) throws IllegalPatchException { LimitExpression expn = suffixExpn.getLimitExpn(); if (expn == null) { // no limit expn, nothing to do return; } PatchedLimitExpression patchedExp = expn.patch(params); if (stmt instanceof Query) { Query<T> query = (Query<T>) stmt; query.limit(patchedExp.getLimitValue()); } else { String msg = "Patching 'limit' of non-query types not supported! Class was:" + stmt.getClass().getName(); IllegalStateException invalid = new IllegalStateException(msg); throw new IllegalPatchException(invalid); } } private void patchSort(Statement<T> stmt, PreparedParameter[] params) throws IllegalPatchException { SortExpression expn = suffixExpn.getSortExpn(); if (expn == null) { // no sort expn, nothing to do return; } PatchedSortExpression patchedExp = expn.patch(params); if (stmt instanceof Query) { Query<T> query = (Query<T>) stmt; PatchedSortMember[] members = patchedExp.getSortMembers(); for (int i = 0; i < members.length; i++) { query.sort(members[i].getSortKey(), members[i].getDirection()); } } else { String msg = "Patching 'sort' of non-query types not supported! Class was:" + stmt.getClass().getName(); IllegalStateException invalid = new IllegalStateException(msg); throw new IllegalPatchException(invalid); } } private void patchWhere(Statement<T> stmt, PreparedParameter[] params) throws IllegalPatchException { WhereExpression expn = suffixExpn.getWhereExpn(); if (expn == null) { // no where, nothing to do return; } // walk the tree, create actual expressions and patch values along // the way. PatchedWhereExpression patchedExp = expn.patch(params); Expression whereClause = patchedExp.getExpression(); if (stmt instanceof Query) { Query<T> query = (Query<T>) stmt; query.where(whereClause); } else if (stmt instanceof Replace) { Replace<T> replace = (Replace<T>) stmt; replace.where(whereClause); } else if (stmt instanceof Update) { Update<T> update = (Update<T>) stmt; update.where(whereClause); } else if (stmt instanceof Remove) { Remove<T> remove = (Remove<T>) stmt; remove.where(whereClause); } else { String msg = "Patching of where clause not supported! Class was:" + stmt.getClass().getName(); IllegalStateException invalid = new IllegalStateException(msg); throw new IllegalPatchException(invalid); } } Statement<T> getRawStatement() { return statement; } void setNumFreeParams(int num) { this.numParams = num; } void setSuffixExpression(SuffixExpression tree) { this.suffixExpn = tree; } SuffixExpression getSuffixExpression() { return suffixExpn; } SetList getSetList() { return setList; } void setSetList(SetList setList) { this.setList = setList; } }