com.opengamma.elsql.LikeSqlFragment.java Source code

Introduction

Here is the source code for com.opengamma.elsql.LikeSqlFragment.java

Source

/**
 * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.elsql;

import org.apache.commons.lang.ObjectUtils;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;

/**
 * Representation of LIKE(variable).
 * <p>
 * This handles switching between LIKE and = based on the presence of wildcards.
 */
final class LikeSqlFragment extends ContainerSqlFragment {

    /**
     * The variable.
     */
    private final String _variable;

    /**
     * Creates an instance.
     * 
     * @param variable  the variable to base the LIKE on, not null
     */
    LikeSqlFragment(String variable) {
        if (variable == null) {
            throw new IllegalArgumentException("Variable must be specified");
        }
        if (variable.startsWith(":") == false || variable.length() < 2) {
            throw new IllegalArgumentException("Argument is not a variable (starting with a colon)");
        }
        _variable = variable.substring(1);
    }

    //-------------------------------------------------------------------------
    /**
     * Gets the variable.
     * 
     * @return the variable, not null
     */
    public String getVariable() {
        return _variable;
    }

    //-------------------------------------------------------------------------
    @Override
    protected void toSQL(StringBuilder buf, ElSqlBundle bundle, SqlParameterSource paramSource) {
        String value = ObjectUtils.toString(paramSource.getValue(_variable));
        if (bundle.getConfig().isLikeWildcard(value)) {
            buf.append("LIKE ");
            super.toSQL(buf, bundle, paramSource);
            buf.append(bundle.getConfig().getLikeSuffix());
        } else {
            buf.append("= ");
            super.toSQL(buf, bundle, paramSource);
        }
    }

    //-------------------------------------------------------------------------
    @Override
    public String toString() {
        return getClass().getSimpleName() + ":" + _variable + " " + getFragments();
    }

}