com.ibm.watson.catalyst.jumpqa.replacer.VarReplacer.java Source code

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Here is the source code for com.ibm.watson.catalyst.jumpqa.replacer.VarReplacer.java

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/*******************************************************************************
 * Copyright 2015 IBM Corporation
 *
 * 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 com.ibm.watson.catalyst.jumpqa.replacer;

import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.builder.HashCodeBuilder;

import com.ibm.watson.catalyst.jumpqa.replacer.IReplacer;

/**
 * TODO: Class description
 * 
 * @author Will Beason
 * @version 0.1.1
 * @since 0.1.0
 *
 */
public class VarReplacer implements IReplacer {

    private final Pattern _pattern;

    /**
     * @param aPattern the pattern to replace
     */
    public VarReplacer(Pattern aPattern) {
        _pattern = aPattern;
    }

    /**
     * @param aPattern the regular expression replace
     */
    public VarReplacer(String aPattern) {
        this(Pattern.compile(aPattern));
    }

    @Override
    public String replace(String input, String... args) {
        return _pattern.matcher(input).replaceAll(Matcher.quoteReplacement(args[0]));
    }

    /**
     * TODO: Method description
     * 
     * @param input the input string
     * @param arg the argument
     * @return the replacement
     */
    public String replace(String input, String arg) {
        return _pattern.matcher(input).replaceAll(Matcher.quoteReplacement(arg));
    }

    @Override
    public int numArgs() {
        return 1;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null || getClass() != obj.getClass())
            return false;
        VarReplacer other = (VarReplacer) obj;
        if (!Objects.equals(other._pattern.toString(), this._pattern.toString()))
            return false;
        if (!Objects.equals(other._pattern.flags(), this._pattern.flags()))
            return false;
        return true;
    }

    @Override
    public int hashCode() {
        return (new HashCodeBuilder(SEED, MULTIPLY)).append(_pattern.toString()).append(_pattern.flags())
                .hashCode();
    }

    private static final int SEED = 1853186509;
    private static final int MULTIPLY = 1530150889;

}