com.clican.pluto.dataprocess.dpl.function.impl.BaseFunction.java Source code

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Here is the source code for com.clican.pluto.dataprocess.dpl.function.impl.BaseFunction.java

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/**
 * The Clican-Pluto software suit is Copyright 2009, Clican Company and individual contributors, and is licensed under the GNU LGPL.
 *
 * @author clican
 *
 */
package com.clican.pluto.dataprocess.dpl.function.impl;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.UUID;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.clican.pluto.dataprocess.dpl.parser.bean.PrefixAndSuffix;
import com.clican.pluto.dataprocess.dpl.parser.object.Function;
import com.clican.pluto.dataprocess.exception.DplParseException;

public abstract class BaseFunction implements Function {

    protected final Log log = LogFactory.getLog(getClass());

    protected final Log tracesLog = LogFactory
            .getLog("com.jsw.dataprocess.engine.processes.DplExecProcessor.tracesLog");

    protected List<Object> params;

    protected List<PrefixAndSuffix> pasList;

    protected String id;

    protected String expr;

    protected String trace;

    /**
     * ?select??
     */
    protected String columnName;

    public String getColumnName() {
        return this.columnName;
    }

    public void setColumnName(String columnName) {
        this.columnName = columnName;
    }

    public BaseFunction() {
        this.id = UUID.randomUUID().toString();
    }

    public String getId() {
        return id;
    }

    public String getExpr() {
        return expr;
    }

    public void setExpr(String expr) {
        this.expr = expr;
    }

    public String getTrace() {
        return trace;
    }

    public void setTrace(String trace) {
        this.trace = trace;
    }

    public void setParams(List<Object> params) throws DplParseException {
        this.params = params;
        this.pasList = getPrefixeAndSuffix(params);
    }

    public List<Object> getParams() {
        return this.params;
    }

    public List<String> getFromParams() {
        Set<String> fromParams = new HashSet<String>();
        for (PrefixAndSuffix pas : this.pasList) {
            fromParams.addAll(pas.getFromParams());
        }
        return new ArrayList<String>(fromParams);
    }

    private List<PrefixAndSuffix> getPrefixeAndSuffix(List<Object> params) throws DplParseException {
        List<PrefixAndSuffix> list = new ArrayList<PrefixAndSuffix>();
        for (Object param : params) {
            PrefixAndSuffix pas;
            if (param instanceof Function) {
                pas = new PrefixAndSuffix((Function) param);
            } else if (param instanceof String) {
                pas = new PrefixAndSuffix(param.toString());
            } else if (param instanceof PrefixAndSuffix) {
                pas = (PrefixAndSuffix) param;
            } else {
                // ?????,FunctionParser??
                throw new DplParseException("??");
            }
            list.add(pas);
        }
        return list;
    }

    public boolean isLazyCalc() {
        return true;
    }

}

// $Id: BaseFunction.java 13254 2010-05-26 09:50:41Z wei.zhang $