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Google App Engine compliant variation of FreeMarker. FreeMarker is a "template engine"; a generic tool to generate text output based on templates.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 freemarker.debug;

import java.io.Serializable;

/**
 * Represents a breakpoint location consisting of a template name and a line number.
 */
public class Breakpoint implements Serializable, Comparable {
    private static final long serialVersionUID = 1L;

    private final String templateName;
    private final int line;
    
    /**
     * Creates a new breakpoint.
     * @param templateName the name of the template
     * @param line the line number in the template where to put the breakpoint
     */
    public Breakpoint(String templateName, int line) {
        this.templateName = templateName;
        this.line = line;
    }

    /**
     * Returns the line number of the breakpoint
     */
    public int getLine() {
        return line;
    }
    /**
     * Returns the template name of the breakpoint
     */
    public String getTemplateName() {
        return templateName;
    }

    @Override
    public int hashCode() {
        return templateName.hashCode() + 31 * line;
    }
    
    @Override
    public boolean equals(Object o) {
        if (o instanceof Breakpoint) {
            Breakpoint b = (Breakpoint) o;
            return b.templateName.equals(templateName) && b.line == line;
        }
        return false;
    }
    
    @Override
    public int compareTo(Object o) {
        Breakpoint b = (Breakpoint) o;
        int r = templateName.compareTo(b.templateName);
        return r == 0 ? line - b.line : r;
    }
    
    /**
     * Returns the template name and the line number separated with a colon
     */
    public String getLocationString() {
        return templateName + ":" + line;
    }
}