WriterContext.java

/************************************************************************
 * Copyright (c) 2014-2016 IoT-Solutions e.U.
 * 
 * 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 iot.jcypher.query.writer;

import java.util.ArrayList;
import java.util.List;

import iot.jcypher.query.ast.ClauseType;

public class WriterContext {

	public StringBuilder buffer = new StringBuilder();
	public StringBuilder filterBuffer;
	public Format cypherFormat = Format.NONE;
	public boolean inFunction = false;
	public ClauseType currentClause;
	public ClauseType previousClause;
	boolean extractParams = false;
	List<IQueryParam> queryParams;
	IQueryParam currentParamOrSet;
	// vs. using cypher endpoint
	boolean useTransactionalEndpoint = false;
	Object preparedQuery;
	
	// allows to specify a number of resultDataContents for
	// JSON output from the REST API
	private List<String> resultDataContents;
	private int paramIndex = -1;
	private int paramSetIndex = 0;
	private int level = 0;
	
	public void incrementLevel() {
		this.level++;
	}
	
	public void decrementLevel() {
		this.level--;
	}
	
	public void resetLevel() {
		this.level = 0;
	}
	
	public String getLevelIndent() {
		String indent = new String();
		for (int i = 0; i < this.level;i++) {
			indent = indent.concat(Pretty.INDENT);
		}
		return indent;
	}
	
	int getParamIndex() {
		return paramIndex;
	}

	void setParamIndex(int paramIndex) {
		this.paramIndex = paramIndex;
	}

	int getNextParamIndex() {
		this.paramIndex++;
		return this.paramIndex;
	}
	
	void incrementParamSetIndex() {
		this.paramSetIndex++;
	}
	
	int getParamSetIndex() {
		return this.paramSetIndex;
	}
	
	List<String> getResultDataContents() {
		if (this.resultDataContents == null) {
			this.resultDataContents = new ArrayList<String>();
		}
		return this.resultDataContents;
	}

	void setResultDataContents(List<String> resultDataContents) {
		this.resultDataContents = resultDataContents;
	}
	
	void doesHaveDSLParams() {
		if (this.preparedQuery instanceof PreparedQuery)
			((PreparedQuery)this.preparedQuery).setdSLParams();
		else if (this.preparedQuery instanceof PreparedQueries)
			((PreparedQueries)this.preparedQuery).setdSLParams();
	}
}