com.squarespace.less.model.Anonymous.java Source code

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Here is the source code for com.squarespace.less.model.Anonymous.java

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/**
 * Copyright (c) 2014 SQUARESPACE, Inc.
 *
 * 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.squarespace.less.model;

import static com.squarespace.less.core.LessUtils.safeEquals;

import org.apache.commons.lang3.StringEscapeUtils;

import com.squarespace.less.core.Buffer;
import com.squarespace.less.core.LessInternalException;

/**
 * Anonymous nodes are used any time an opaque string.
 */
public class Anonymous extends BaseNode {

    /**
     * Default value for anonymous nodes are the empty string.
     */
    private static final String EMPTY = "";

    /**
     * String value to be emitted.
     */
    protected final String value;

    /**
     * Constructs an anonymous string with an empty string.
     */
    public Anonymous() {
        this.value = EMPTY;
    }

    /**
     * Constructs an anonymous string with the given {@code value}.
     */
    public Anonymous(String value) {
        if (value == null) {
            throw new LessInternalException("Serious error: value cannot be null.");
        }
        this.value = value;
    }

    /**
     * Returns the string value.
     */
    public String value() {
        return value;
    }

    /**
     * See {@link Node#type()}
     */
    @Override
    public NodeType type() {
        return NodeType.ANONYMOUS;
    }

    /**
     * See {@link Node#repr(Buffer)}
     */
    @Override
    public void repr(Buffer buf) {
        buf.append(value);
    }

    /**
     * See {@link Node#modelRepr(Buffer)}
     */
    @Override
    public void modelRepr(Buffer buf) {
        typeRepr(buf);
        posRepr(buf);
        buf.append(" \"");
        if (value != null) {
            buf.append(StringEscapeUtils.escapeJava(value));
        }
        buf.append('"');
    }

    @Override
    public boolean equals(Object obj) {
        return (obj instanceof Anonymous) ? safeEquals(value, ((Anonymous) obj).value) : false;
    }

    @Override
    public int hashCode() {
        return hashCode == 0 ? buildHashCode(value) : hashCode;
    }

}