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Thymeleaf Layout Dialect rewritten in java.

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/*
 * Copyright 2016, Emanuel Rabina (http://www.ultraq.net.nz/)
 *
 * 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 nz.net.ultraq.thymeleaf.models;

import org.thymeleaf.standard.expression.Assignation;

/**
 * Representation of a scoped variable declaration made through {@code th:with}
 * attributes. This is really a wrapper around Thymeleaf's {@link Assignation}
 * class, but simplified to just the left and right hand components in string
 * form.
 *
 * @author zhanhb
 * @author Emanuel Rabina
 */
public class VariableDeclaration {

    private final String name;
    private final String value;

    /**
     * Constructor, create an instance from a Thymeleaf assignation.
     *
     * @param assignation
     */
    public VariableDeclaration(Assignation assignation) {
        String declaration = assignation.getStringRepresentation();
        int equalsIndex = declaration.indexOf('=');

        name = declaration.substring(0, equalsIndex);
        value = declaration.substring(equalsIndex + 1);
    }

    /**
     * Reconstructs the variable for use with {@code th:with}.
     *
     * @return {name}=${value}
     */
    @Override
    public String toString() {
        return name + "=" + value;
    }

    public String getName() {
        return name;
    }

    public String getValue() {
        return value;
    }

}